Go Kart Clutch 3/4" Bore 10 Tooth for #40/41/420 Chain, 3/4" Bore 10T About this item ?BROAD COMPATIBILITY?: This go kart clutch and chain fit for Go Kart Yerf-Dog karts, Fit for Tecumseh, for Baja MB165 and MB200 Minibike, including for Baja Heat, for Mini Baja; for Baja Warrior. NOTE: 1, Apply lubricating oil before use; 2, After installation, start it 3-5 times for running-in ?WORK WITH?: Go Kart Clutch 3/4" Bore 10 Tooth Sprocket for 40/41/420 Chain designed for 2-6.5Hp 212cc Predator engines clutch. Outside diameter: 4 3/4"; Total width: 3"; Clutch back to sprocket: 2 1/2". (Chain Not included). ?Usage Tip 1?: Before using the product, you can drop lubricating oil above the retaining ring, fill it up in a circle, wait for it to seep in, then rotate the clutch. If there is no obstruction during rotation, there is no need to disassemble it. (The oil dripping position can be seen in the picture below) ?Usage Tip 2?: When this product is first installed and started to operate, it needs to be run-in 3 to 5 times to avoid the problem of insufficient contact area of the internal parts of the clutch due to insufficient speed, which may cause slippage and smoke due to friction. The specific measurement steps are as follows: First, run the engine no-load until the clutch is engaged for the first time, hold for 10 seconds, and then turn off the engine to cool down. Second, gradually increase the load three times, from 0 to full speed, with a 2-minute interval for cooling each time. If there are no issues with the appeal process, it can be used normally. ?FITMENT? : Fit for 2- 6.5HP Small Engines Fit for HONDA GC160, GC190, GX120, GX140, GX160, GX200. And for BS and Fit for Tecumseh 2-6.5 HP with 3/4" Shaft. ?WARM TIPS? : 3/4 inch centrifugal clutch for single wheel belt direct drive karts with tires No Larger Than 15" tall. ?Quick reply? : Go Cart centrifugal clutch from Youxmoto. Quick reply within 8 hours; Provide technical support, If you encounter any questions on our Products.