sthus Silver Shifter Kit Jackshaft Kit for Regular 415 Chain 66cc 80cc Gas 2 Stroke Motorized Bicycle Bike
- Modified Accessories Jackshaft Kit For 415 Chain 66cc 80cc Gas Motorized Bicycle.
- This kit will fit almost any stock, unmodified 2 Stroke bike engine and allow the user to shift gears using the bike's standard rear derailleur. Take a look at the parts list in our installation manual to see what we supply in this kit..
- The secret is the front freewheel allowing you to still pedal the bike normally and yet start the bike with the pedals and not have to pedal the same speed once the motor starts..
- Package Include:1 x Jackshaft Kit 1 x Installation Notes.
- The gearing will depend on your rear transmission assembly but typically you will see ratios between 5.8 to 1 and 2.7 to 1. This is like running a 58 tooth rear sprocket in the stock set up all the way down to a 27 tooth. This will allow you to climb the steepest hills and still hit top speeds in excess of 40 mph without straining your engine..