Here's the scoop there are 4 gearbox/drives for the 4-strokes that I know of
1. the hoot style - POS
Experience - 2 on the shelf
Source - why would you
2. grubee - good, reliable with proper maint., noise is not bad, use grease, lube that bushing, leave engaged.
Problems - key shear at free wheel, clutch bushing stick
Experience many thousand of miles on one.
Source -
Bicycle Engines, Motorized Bicycles, Bicycle Motors, Motored Bikes: 2-Stroke & 4-Stroke Kits!
Price - around $120.00
3. ezmotorbike silent drive - looks like this will be the best, easy change ratios, silent
Experience - talked with co. owners, beta dealers, considering dealership
Source - local ezmotorbike dealer, try
Get YOUR EZmotorbike TODAY! home site
Price - $650.00 must buy complete kit
4. firebelly - interesting, nice design, not in production
Experience - none
Source -
FireBelly Cycles
Price - $350.00