Sprocket ratio

May 29, 2008 · Registered. Joined May 15, 2007. 1,980 Posts. #4 · May 29, 2008. The 16 tooth sprocket will net you about 500 RPM's lower than normal. Gains in mileage can vary from 2 mpg up to 5 or 6, it all is dependant upon your riding style, how hard you like to hit the accelorator and of course overall weight. Sprocket Ratios... Jump to Latest Follow 1 - 10 of 10 Posts. P. pmartnz2000 · Registered. Joined Sep 29, 2006 · 4 Posts ...'Sprocket', namely refers to a wheel of any type over which radially directed projections for engagement is made and a chain is passed over it. It is differentiated from a gear by the fact that it can never be meshed together directly and differs from a pulley as a sprocket has teeth. ... 1st gear ratio = 12/32. Final drive ratio = 2.66×2.66 x ...Jun 29, 2015 · So I have a 2001 400ex bored to a 440 with lots of extras it works great. It's pretty fast but not the greatest with wheelies and I was just wondering if I dropped down a sprocket size in the front would do the trick and give it a little more grunt. Currently has a 15/38 ratio, so I was just wond... Our sprockets and chains are made with the highest quality materials and craftsmanship, so you are guaranteed high-functioning operations for years to come. Give our knowledgeable professionals a call at (847) 893-0740 or send us an email at [email protected] today for more information about your unique sprocket solution.'Sprocket', namely refers to a wheel of any type over which radially directed projections for engagement is made and a chain is passed over it. It is differentiated from a gear by the fact that it can never be meshed together directly and differs from a pulley as a sprocket has teeth. ... 1st gear ratio = 12/32. Final drive ratio = 2.66×2.66 x ...Feb 22, 2017 · How to Calculate Secondary Drive Ratio: Number of teeth on rear sprocket/Number of teeth on the front sprocket. This would provide you with a ratio of X: 1. The higher the ratio, the shorter the gearing will be. A tall ratio would be 2.5:1 while a shorter one would be 3.5:1. Shift points are also affected by drive ratio. Sprocket Ratio. Jump to Latest Follow 1 - 10 of 10 Posts. R ... When I went -1 +2 I was neck and neck with him from 1st on. I don't understand why I was faster with stock sprockets but I was. Just something to think about I guess... 2006 white/blue GSXR 1000-Lowered 2"/1.5", Puig tinted windscreen ...PITCH PD = SIN (180/Nt) Outside Diameter - The measurement from the tip of the sprocket tooth (O.D.) across to the corresponding point directly across the sprocket. It is comparatively unimportant as the tooth length is not vital to proper meshing with the chain. cash in hand work east london Once you have chosen a specific ratio apply your tire correction factor and then use the following formula to determine the drive-out sprocket to use: Drive-out Sprocket teeth = (Big sprocket teeth * D) divided by (desired gear ratio), where D = 1.2 for the larger engine pulley on later eagles or 1.56 for the smaller engine pulley on early eagles.Sprocket ratio is the number of times the front sprocket has to rotate for each single revolution of the rear sprocket. This is determined by the the number of teeth on the front sprocket, compared to the number of teeth in the rear sprocket. The gear ratio is the ratio of the circumference of the input gear to the circumference of the output gear in a gear train. The gear ratio helps us in determining the number of teeth each gear needs to produce a desired output speed/angular velocity, or torque. We calculate the gear ratio between two gears by dividing the circumference of the input gear by the circumference of the output gear.Some manufacturers make their sprocket teeth a little longer or shorter than others so please allow for a small amount of difference in the sprocket's actual outside diameter when using this calculator. Chain Pitch is the center to center distance between two adjacent pins. Sprocket Teeth is the number of individual teeth that the sprocket has. I have read in other forums that changing the gear ratio of a e-bike is not possible, because the motor software has been factory programmed on each e-bike model to a certain gear ratio. For example, If you change the rear sprocket 11-42 / 11 speed for a 10-50 / 10 speed, the system detect that the gear ratio is not correct and launch a display ...Sprockets come in a wide range of tooth counts for each ANSI chain size. Below is a sprocket diameter chart we've put together to help you identify the sprocket diameter you need based on the chain size and tooth count. The diameters listed in our chart is the outside diameter of the sprocket (Tip of the sprocket tooth). Style Sprockets We Offer:A larger gear ratio—say, 3.10—correlates to shorter gearing, while a low number—like 2.70—represents taller gearing. It all goes back to how many times that front sprocket has to rotate to turn the...I wouldn't want a "higher" (lower numerically) final drive ratio myself on my stock-engine Generation 1, but . . . as mentioned, a matter of individual choice. That said, if you want to gear your bike higher, there exists a 17-tooth countershaft sprocket, I'm told; may require some relief modifications for clearance.Motorcycle speed and sprocket calculator with bike database for gearing, sprockets, tires and chains of over 1750 bikes. Request yours to be added as well. ... Sprocket-Combo Help on: Sprocket-Combo-Speed graph; Final Drive Ratio Help on: Final Drive Ratio graph (Bike independant). RPM Differences Help on: ...Sprocket Ratios... Jump to Latest Follow 1 - 10 of 10 Posts. P. pmartnz2000 · Registered. Joined Sep 29, 2006 · 4 Posts ...You can your gear ratio 2 ways: Change your pulley and belt, or change your primary ratio. The stock final gear ratio on the TWIN CAM is 3.153:1 ratio. (5-speed) If you drop the compensating sprocket (OEM 25T) from 25 teeth down to 24 teeth and drop the transmission sprocket from 32 teeth down to 30 teeth, (Andrews sells one) your gear ratio ... small monolithic dome homes For every 1 tooth that you change on the front sprocket is like changing 3 to 4 teeth on the rear (and that's true for higher gearing ratios, too). This configuration creates that smaller ...Feb 09, 2007 · 2/10/2007 9:18 PM. whats a good sprocket to freewheel ratio for someone who likes to ride around a lot and like to bmx park at times. like a decent acceleration and a decent top speed. cuz im not one of those bmx all day or the ride around all day poeple. im more of both. i had a 43t that came with my bike, but then i changed to a 33t industry ... May 29, 2008 · Registered. Joined May 15, 2007. 1,980 Posts. #4 · May 29, 2008. The 16 tooth sprocket will net you about 500 RPM's lower than normal. Gains in mileage can vary from 2 mpg up to 5 or 6, it all is dependant upon your riding style, how hard you like to hit the accelorator and of course overall weight. Follow our diagram and input the teeth count of your Engine/Clutch Sprocket and your Rear Axle Sprocket. Measure the circumference in inches for your rear tire. This will calculate the final gear ratio and mph. EC Kart Gearing Calculator Engine Teeth Count Axle Teeth Count Engine RPM Right Rear Tire CircumferenceThe sprocket pitch diameter is an imaginary circle through which the chain pin centers move around the sprocket. The pitch diameter is the fundamental design geometry that determines the size shape and form of the sprocket teeth dimensions. ... Two Gears Sprocket Speed and Gear Ratio Equation and Calculator; Roller Chains Review - Engineers ...May 10, 2020 · A larger gear ratio—say, 3.10—correlates to shorter gearing, while a low number—like 2.70—represents taller gearing. It all goes back to how many times that front sprocket has to rotate to ... Enter gear ratios, primary ratio, sprocket sizes and tire diameter, then drag RPM slider to calculate speed from RPM. Drag Max RPM slider to adjust the range of the RPM and Speedometer Gauges. Enter Shift at RPM, select gear to shift to and hit Shift and Trace to run up through the gears recording shift point RPM and km/h - mph.Shimano's 8-speed for road bikes is CLARIS, and the medium cage rear derailleur is RD-R2000-GS. The RD-R2000-GS has a total gear capacity of 43T and a maximum low of 34T, so a wide ratio sprocket of up to 34T can be used. There are quite a few options for wide-ratio sprockets, even for 8-speed road bikes, and in many cases, the initial state ... sig p365 two tone price SPEED RATIOS SPROCKET DIAMETERS HORSEPOWER RATINGS SPROCKETS American sprocket manufacturers have adopted 4 specific types of sprocket construction styles as American Standards. In addition to the standard sprockets, special sprockets may be available in the same styles. Style A - Flat sprocket with no hub extension either side. Sprockets come in a wide range of tooth counts for each ANSI chain size. Below is a sprocket diameter chart we've put together to help you identify the sprocket diameter you need based on the chain size and tooth count. The diameters listed in our chart is the outside diameter of the sprocket (Tip of the sprocket tooth). SPROCKET (CHAINWHEEL) Old BMX bikes were equipped with 48T (teeth) sprockets, however this is not a standard size anymore. Most common sprocket size today is 25T or 28T with 23,7mm bore. There are two basic sprocket types - bolt drive and spline drive. Bolt drive sprocket is attached to the crank arm with a bolt.For chain sprockets that is the diameter which defined by the centerline of the chain rollers on the sprocket (red circle): Pd = Pitch Diameter ( smaller as actual sprocket diameter Sd) Sd = Sprocket diameter (max. sprocket diameter) Cd = Chain Diameter (diameter sprocket and chain together) Question about sprockets - a good one this time...VIDEO SEARCH - https://the-workshop.net/STICKERS here - https://www.redbubble.com/people/the-workshop/shop?...Gear Ratio to Speed Ratio Equivalency Equation: (Number of Teeth in Pinion Gear) / (Number of Teeth in Spur Gear) = (Speed of Spur Gear) / (Speed of Pinion Gear) Vehicle Velocity (mph) = Spur gear RPM * Wheel diameter (inches) * π * 60 (minutes/hr) / 63360 (in/hr) orFeb 22, 2017 · How to Calculate Secondary Drive Ratio: Number of teeth on rear sprocket/Number of teeth on the front sprocket. This would provide you with a ratio of X: 1. The higher the ratio, the shorter the gearing will be. A tall ratio would be 2.5:1 while a shorter one would be 3.5:1. Shift points are also affected by drive ratio. May 10, 2020 · A larger gear ratio—say, 3.10—correlates to shorter gearing, while a low number—like 2.70—represents taller gearing. It all goes back to how many times that front sprocket has to rotate to ... alto camper for sale Feb 22, 2017 · The most common gear change is the -1 +2, 520 conversion, representing the front and rear sprocket pitches respectively and referencing them to the biker's current sprockets. Once changed, the front sprocket is one tooth smaller than its reference while the rear sprocket is two teeth larger than its reference. Notice from the table that 996's are geared unusually high, probably the highest of any Ducati model. The high gearing is the result of using the unique combination of the standard gearbox plus the 1:84 primary gear ratio. So sprockets that work well for 916's and 998's are still too high for 996's. Tales of the Front SprocketFirst, count the teeth on your sprockets Then, You will need to divide the amount of rear sprocket teeth. To how many teeth you have, on the front sprocket Lets say for example, you have 50 teeth. On the rear sprocket, and 14 on the front (countershaft) sprocket. 50/14=3.57 This means, the front sprocket will rotate 3.57 times.For example, a motorcycle with a 17-tooth front sprocket and a 45-tooth rear sprocket would have a ratio of 2.65 (45 divided by 17 = 2.65). The higher the ratio number, the more acceleration and bottom-end power your motorcycle will have, but a lower top-end speed. SPEED RATIOS SPROCKET DIAMETERS HORSEPOWER RATINGS SPROCKETS American sprocket manufacturers have adopted 4 specific types of sprocket construction styles as American Standards. In addition to the standard sprockets, special sprockets may be available in the same styles. Style A - Flat sprocket with no hub extension either side. John Henry Foster Co. 4700 LeBourget Dr. St. Louis, MO 63134 314-427-0600Notice from the table that 996's are geared unusually high, probably the highest of any Ducati model. The high gearing is the result of using the unique combination of the standard gearbox plus the 1:84 primary gear ratio. So sprockets that work well for 916's and 998's are still too high for 996's. Tales of the Front SprocketSprocket Pitch Circle Diameter Equation. PD = P / sin [ 180° / N ] Where: PD = Pitch Diameter P = Chain Pitch in inches N = Number of teeth on the sprocket. Related: Precision Sprockets Caliper Diameters per ANSI/ASME B29.1M; Sprocket Center Distance Equation and Calculator; Two Gears Sprocket Speed and Gear Ratio Equation and Calculator Apr 06, 2009 · For street, smaller sprockets are better but for trails bigger ones are. It's all in personal preference. And like the person above said, try and get around 2.75 for ratio. Just divide the chainwheel with the driver to get the ratio. R ramos617 New Member Apr 6, 2009 #10 ya il mainly be on street E easterntraildigg New Member Apr 6, 2009 #11 25/9 local news traffic accidents todayrealignment us politicsMore revolutions equals shorter gearing and thus higher RPM at a given speed. The ratio on 15/42 is 2.80. 16/44 is 2.75. SPROCKET GEAR RATIOS In theory, increasing the number of teeth on the front sprocket and/or decreasing the number of teeth on the rear sprocket will result in you achieving a higher top speed, lower acceleration and better ... Lowering the ratio increases top end speed - Increasing the ratio increases acceleration and bottom end power. H T E E T T CKE RO P S AR RE > > > D E E P S D N E P O T E R O M > > > > > > < < < < < < N IO T A R E L E C C A R E T S A F < < < 0.00 1.00 2.00 3.00 4.00 5.00 6.00The ratio of the number of teeth on your sprocket and cassette is mostly personal preference. It is very similar to lots of other aspects when setting up a bike. Increasing the number of teeth on the front sprocket or decreasing the number of teeth on the rear sprocket will result in a higher gear ratio. This will make the bike hard to pedal on ...Aug 16, 2006 · Time for new chain and sprockets. Stock my bike is 13/49 but I have a new spare 51 in the garage. Will there be any problems running a 14/51 combination? Are there any disadvantages to running a bigger front sprocket? May 10, 2020 · A larger gear ratio—say, 3.10—correlates to shorter gearing, while a low number—like 2.70—represents taller gearing. It all goes back to how many times that front sprocket has to rotate to ... Cheapest easiest way to test it is put a 14t on the front and leave the 52 on the back for now. 1 tooth change on front is like 3-4 out back. You're already geared lower than stock with 13/52 so putting the 14t on won't be a crazy amount taller than stock (shouldn't totally kill low end).PITCH PD = SIN (180/Nt) Outside Diameter - The measurement from the tip of the sprocket tooth (O.D.) across to the corresponding point directly across the sprocket. It is comparatively unimportant as the tooth length is not vital to proper meshing with the chain.Feb 22, 2017 · The most common gear change is the -1 +2, 520 conversion, representing the front and rear sprocket pitches respectively and referencing them to the biker's current sprockets. Once changed, the front sprocket is one tooth smaller than its reference while the rear sprocket is two teeth larger than its reference. Notice from the table that 996's are geared unusually high, probably the highest of any Ducati model. The high gearing is the result of using the unique combination of the standard gearbox plus the 1:84 primary gear ratio. So sprockets that work well for 916's and 998's are still too high for 996's. Tales of the Front SprocketFor every 1 tooth that you change on the front sprocket is like changing 3 to 4 teeth on the rear (and that's true for higher gearing ratios, too). This configuration creates that smaller ...Feb 22, 2017 · How to Calculate Secondary Drive Ratio: Number of teeth on rear sprocket/Number of teeth on the front sprocket. This would provide you with a ratio of X: 1. The higher the ratio, the shorter the gearing will be. A tall ratio would be 2.5:1 while a shorter one would be 3.5:1. Shift points are also affected by drive ratio. angular activatedroute snapshot Jun 02, 2021 · To turn the rear sprocket once, the counter shaft sprocket has to spin the number of times in the "Ratio" column. (see gear ratio image) As an example, a 30 tooth rear sprocket and a 10 tooth front sprocket equals a 3.00 gearing ratio or three rotations on the front for every one rotation on the rear. Gear Ratio Calculations And Terms. To obtain your gear ratio is simple, you can use the chart provided below, or simply divide the number of teeth on the rear sprocket, by the number of teeth on the front sprocket. For example if your rear sprocket had 40 teeth and your front sprocket had 12 teeth. 40/12 = 3.33, your gear ratio would be 3.33.The inner diameter is 1.4", hole spacing is 1". See table below for specifications. Commonly, the large 9-hole sprocket with 48 tooth configuration will come with the 4G T-Belt Drive 4-stroke engine kit. The small 9-hole sprockets come in two sizes, 44 tooth and 50 tooth. The inner diameter is 1.39" and hole spacing is 1".Aug 16, 2006 · Time for new chain and sprockets. Stock my bike is 13/49 but I have a new spare 51 in the garage. Will there be any problems running a 14/51 combination? Are there any disadvantages to running a bigger front sprocket? (P.D.)followed by the centers of the chain pins as the sprocket revolves in mesh with the chain. PITCH DP = INS (180/Nt) Outside Diameter- The measurement from the tip of the sprocket tooth (O.D.)across to the corresponding point directly across the sprocket.Jun 02, 2021 · To turn the rear sprocket once, the counter shaft sprocket has to spin the number of times in the "Ratio" column. (see gear ratio image) As an example, a 30 tooth rear sprocket and a 10 tooth front sprocket equals a 3.00 gearing ratio or three rotations on the front for every one rotation on the rear. Question about sprockets - a good one this time...VIDEO SEARCH - https://the-workshop.net/STICKERS here - https://www.redbubble.com/people/the-workshop/shop?... legal issues in information security The '14 came stock with 14/45 sprockets, which seems fine for the road, but I would like it to have a bit more pop down low. A lot of people tout the 14/52 setup. According to a gear ratio table, a 13/48 gives you almost the same ratio, but I think would allow me to use my stock chain. Sprocket Combo - Ratio 14/45 - 3.21 14/52 - 3.72Aug 16, 2006 · Time for new chain and sprockets. Stock my bike is 13/49 but I have a new spare 51 in the garage. Will there be any problems running a 14/51 combination? Are there any disadvantages to running a bigger front sprocket? With a 40 tooth sprocket that top speed at 6000rpm is now 28.3mph, With a 38 tooth your top speed at 6000rpm is now 29.8mph And with a 36 tooth sprocket, your top speed at 6000rpm is 31.4 Basically, in really rough numbers, every 1 tooth of back sprocket gives you roughly .75-.8mph at 6000rpm. Here is the real kicker.Aug 16, 2006 · Time for new chain and sprockets. Stock my bike is 13/49 but I have a new spare 51 in the garage. Will there be any problems running a 14/51 combination? Are there any disadvantages to running a bigger front sprocket? A ratio of 1/4 to one would be signified by .25:1. To find the total ratio, use the equation: Ratio = (Radius of Driven Sprocket) / (Radius of Drive Sprocket) Example: On a bicycle, the sprocket that is attached to the pedals is the drive sprocket and is 4 inches in radius. The driven sprocket at the rear wheel is 2 inches in radius. Dec 20, 2010 · What Is Final Drive Ratio: The final drive ratio can be calculated by dividing the number of teeth on the rear motorcycle sprockets by the number of teeth on the front or countershaft sprocket. For an off-road dirt bike the result will typically range from approximately 3.5 to 4.5. This number represents how many times the countershaft sprocket will turn in order to turn the rear motorcycle wheel one revolution. Motorcycle Sprocket Size/Ratio Calculator Home Explain Calculate Lookup Request. Select current size of front and rear sprockets as well as the new sizes. FRONT: REAR : Two Gear or Sprocket Speed and Gear Ratio Equation and Calculator. Pinion Gear definition: A pinion is a round gear - usually the smaller of two meshed or chained together gears used in many applications and is the gear that drives or provides power to the gear train system. Front and rear motorcycle sprockets come in different sizes, which are determined by the number of teeth they have. To calculate the motorcycle sprocket ratio, you divide the number of teeth in the rear sprocket by the number of teeth in the front sprocket. It is as simple as that! Here’s an example of a sprocket ratio calculation: 46-tooth rear sprocket with a 16-tooth front sprocket: 46/16 = 2.88 The range is from 50 to 110 teeth. In order to find the gear ratio, locate both the number of teeth on the top and the left most column and trace the ratio accordingly. Example: A go-kart with an engine/clutch sprocket (12 teeth) and a rear axle sprocket (75 teeth) has a gear ratio of 6.25 or 6.25:1. 3. What is a Gear Ratio on a Go-Kart?This easy online sprocket calculator will help you determine the effect that different sprockets will have on your motorbike and help you calculate the best sprocket sizes for your riding style. Select current size of front and rear sprockets as well as the new sizes. Link count is approximate. Make sure chain is long enough before you cut it.Some manufacturers make their sprocket teeth a little longer or shorter than others so please allow for a small amount of difference in the sprocket's actual outside diameter when using this calculator. Chain Pitch is the center to center distance between two adjacent pins. Sprocket Teeth is the number of individual teeth that the sprocket has. Once you have chosen a specific ratio apply your tire correction factor and then use the following formula to determine the drive-out sprocket to use: Drive-out Sprocket teeth = (Big sprocket teeth * D) divided by (desired gear ratio), where D = 1.2 for the larger engine pulley on later eagles or 1.56 for the smaller engine pulley on early eagles. The gear ratio is the ratio of the circumference of the input gear to the circumference of the output gear in a gear train. The gear ratio helps us in determining the number of teeth each gear needs to produce a desired output speed/angular velocity, or torque. We calculate the gear ratio between two gears by dividing the circumference of the input gear by the circumference of the output gear.Sprocket Pitch Circle Diameter Equation. PD = P / sin [ 180° / N ] Where: PD = Pitch Diameter P = Chain Pitch in inches N = Number of teeth on the sprocket. Related: Precision Sprockets Caliper Diameters per ANSI/ASME B29.1M; Sprocket Center Distance Equation and Calculator; Two Gears Sprocket Speed and Gear Ratio Equation and Calculator Sprocket Pitch Circle Diameter Equation. PD = P / sin [ 180° / N ] Where: PD = Pitch Diameter P = Chain Pitch in inches N = Number of teeth on the sprocket. Related: Precision Sprockets Caliper Diameters per ANSI/ASME B29.1M; Sprocket Center Distance Equation and Calculator; Two Gears Sprocket Speed and Gear Ratio Equation and Calculator can ping dns server but cannot resolveYou can your gear ratio 2 ways: Change your pulley and belt, or change your primary ratio. The stock final gear ratio on the TWIN CAM is 3.153:1 ratio. (5-speed) If you drop the compensating sprocket (OEM 25T) from 25 teeth down to 24 teeth and drop the transmission sprocket from 32 teeth down to 30 teeth, (Andrews sells one) your gear ratio ...Allows for a wide ratio of teeth number. Rear sprockets are either single, or multiple (called "cassette") - ranging from 5 to 11 or more sprockets. They have smaller gaps in teeth number between adjacent sprockets. Typical MTB cassette with 8 sprockets, which have the following numbers of teeth: 11-13-15-18-21-24-28-32Sprocket Pitch Circle Diameter Equation. PD = P / sin [ 180° / N ] Where: PD = Pitch Diameter P = Chain Pitch in inches N = Number of teeth on the sprocket. Related: Precision Sprockets Caliper Diameters per ANSI/ASME B29.1M; Sprocket Center Distance Equation and Calculator; Two Gears Sprocket Speed and Gear Ratio Equation and Calculator Mar 10, 2015 · No, unfortunately not. If you get a 10T clutch you will have a 3.1:1 ratio, and if you get a 12T you will have a higher 2.58:1 ratio. Even with 10" tyres you are going to have a problem. Any tyre bigger than that will be even worse. There is no way around it i am afraid. The 16HP will help a bit, but not enough. Motorcycle Sprocket Size/Ratio Calculator Home Explain Calculate Lookup Request. Select current size of front and rear sprockets as well as the new sizes. FRONT: REAR : Sprocket Centers 234 Gear Ratio 1.706 : 1 Chain Speed @ 1000 RPM Small Sprocket 216.3 m / min Small Teeth Large Teeth Chain Links Scale Full Scale Rotate ↺ ↻ ← Tooth Marker The lower the chain revolutions, the more frequently each chain link engages the same sprocket tooth, so greater and more uneven the wear.The best ratio for acceleration potential is 7 : 1 – 8 : 1 …. keep it right in that range and do not swerve from it. That is what you will find is typically ideal. Now, also, note your front and back sprocket as well as the difference of teeth between the two. You get about 10 – 15 on that engine sprocket, up front, as well as 30 – 90 ... airsoft shooting range mallThe ratio is 43 divided by 18, which equals 2.39. Say you want more acceleration and don’t mind making the engine rev higher at highway speeds. Switch to a 17-tooth front sprocket and a 45-tooth rear. Now the ratio is 2.65, which means you’ve increased the ratio by approximately 10.9 percent. Sprocket Centers 234 Gear Ratio 1.706 : 1 Chain Speed @ 1000 RPM Small Sprocket 216.3 m / min Small Teeth Large Teeth Chain Links Scale Full Scale Rotate ↺ ↻ ← Tooth Marker The lower the chain revolutions, the more frequently each chain link engages the same sprocket tooth, so greater and more uneven the wear.Apr 06, 2009 · For street, smaller sprockets are better but for trails bigger ones are. It's all in personal preference. And like the person above said, try and get around 2.75 for ratio. Just divide the chainwheel with the driver to get the ratio. R ramos617 New Member Apr 6, 2009 #10 ya il mainly be on street E easterntraildigg New Member Apr 6, 2009 #11 25/9 Position the clutch either way so the sprocket lines up with the rear sprocket (or the jackshaft sprocket). A baja style minibike with 18 or 19" tires comes stock with 10:1 gear ratio with your typical 5-6HP engine. Every minibike I've put together used a torque converter and wheelied dangerously (how i like it).To find the total ratio, use the equation: Ratio = (Radius of Driven Sprocket) / (Radius of Drive Sprocket) Example: On a bicycle, the sprocket that is attached to the pedals is the drive sprocket and is 4 inches in radius. The driven sprocket at the rear wheel is 2 inches in radius. What is the total ratio? Ratio = 2 / 4 Stock sprockets are 16 front, 45 rear for the Virago-250 (V Star 250). A popular upgrade is to replace the sprockets so that the gearing is taller. Taller gearing requires less frequent shifting and even better fuel economy. The Virago 250's V-twin provides sufficient torque to cope with taller gearing. I have read that 17/42 works well.So the sprocket ratio that came with your bike might not be ideal for you. If you want to change it slightly, to give you a little more power for hills for instance, you can easily change one or both sprockets. A new rear sprocket usually costs more than a front sprocket, because it's takes more steel/aluminum and work to make. Position the clutch either way so the sprocket lines up with the rear sprocket (or the jackshaft sprocket). A baja style minibike with 18 or 19" tires comes stock with 10:1 gear ratio with your typical 5-6HP engine. Every minibike I've put together used a torque converter and wheelied dangerously (how i like it).The ratio is 43 divided by 18, which equals 2.39. Say you want more acceleration and don’t mind making the engine rev higher at highway speeds. Switch to a 17-tooth front sprocket and a 45-tooth rear. Now the ratio is 2.65, which means you’ve increased the ratio by approximately 10.9 percent. okcupid xa