Mini Bike Sprocket Ratio

But remember it s all about the ratio and we can change the size of the rear sprocket to alter this ratio also.

Mini bike sprocket ratio.

The gear ratio on your mini bike or go kart is the ratio between the number of teeth on the clutch and the number of teeth on the drive axle sprocket. Sprocket drum combo for mini bike rear wheel. To determine the final drive ratio divide the rear sprocket size say 49 teeth by the front or countershaft sprocket size say 13 teeth like a new yamaha yz250f. One of the most common gear ratios for go karts is 11 12 teeth on the clutch sprocket and 60 teeth on the axle sprocket.

Also fits 6 in. J s out 14 thru 17 or 20 tooth output sprocket. A very common mini bike ratio is 11 12 teeth on the clutch and 72 teeth on the axle sprocket. When using a clutch to drive your go kart the top speed on flat terrain is 35mph if the terrain is hilly or the weight of the driver is high the top speed should be 25mph.

The drum bolts onto our 5 6 and 8 in. The gear ratio is 6 and the potential speed is just under 36 miles per hour. Select 60 or 72t sprocket. Applicable calculator formulae pi 3 14159.

You can find your ratio by calculating these together. To find the gear ratio simply divide the axle teeth by the clutch teeth. Astro wheel using the adapter kit. 16 in front and 46 in back would be 2 875 a less radical change but still a little more than doing only the 16 in front.

To determine the gear ratio necessary for your go kart or mini bike you must know the limit of your top speed. So if we went down to a 16 tooth in the front but simultaneously went up to a 47 tooth in the rear our new ratio would be 2 938. Our default is for a peppy potentially street legal mini bike. In this case the final drive ratio is 3 77 the front sprocket revolves 3 77 times to make one complete revolution of the rear sprocket.

The results are the circumference of the drive wheel tire combo in inches gear ratio and the potential maximum speed in mph. Mini bikes work best with a top speed of 25mph for all terrain. For ordering purposes to determine the js in out gears put your desired clutch and rear gear teeth in the proper box and change the js in gear and js out gear until you get the desired final drive ratio. Our 2208 4 1 2 in.

All sprockets are 35 chain. Axle rear axle sprocket. Rear sprockets come in sizes from 30 to 60 teeth while front sprockets come with 10 to 16 teeth. Use a ratio card to find the sprocket sizes you want.

Im stuck on which gear ratio is the best to get the most speed i can out of the engine. Sprocket size gear ratio questions hey guys i have a 2 5hp briggs and stratton engine and want to build a mini bike. Not quite as extreme.