sthus Black Shifter Kit Jackshaft Kit Fits Regular 415 Chain 66cc 80cc Gas 2 Stroke Motorized Bike Bicycle
Brand: sthus

Description:
New Shifter Kit/Motorized Bike Jackshaft Kit For Regular Bicycle 66cc 80cc Gas Motorized Bicycle Manual excluded.Fits 415 Chain less noise，ride motorized bike as normal bike with pedal
1 x Jackshaft Kit
motorized bike with jackshat kit installed on it gets less noise, can ride bike as normal bike too
Higher installation ability is needed for this item. Please do not place the order if you have no idea about installation or adjustment for this kit. Thank you.

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
Bicycle gear shifting to increase power and speed 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.