It's raining and cold here I Orange County CA and have been spending several hrs. on the computer doing research on CVTs and Torque Converters, I stumbled across a new forum (new to me) that I thought members here might find useful.
OldMiniBikes.com Welcome to OldMiniBikes.com - Vintage Mini Bike Community. Forum, Photo Album, Projects and more A lot of information there about High Performance 4-stroke motors and parts Although most of the motors they are talking about there are larger than the ones normally used on bicycles there are members here using some of these larger motors.
ocscully
Biggest selection of motors. Most orders ship out same-day!
Pirate Cycles
Performance Motors
Monark Springer Forks
Shifting Kits For Motorized Bicycles and More
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Sportsman Flyer Bikes and Accesories
Phantom Bikes
SpookyToothCycles.com
HP 4-stroke motor info Link
Linear Mode
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AUSTRALIA Home for
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gasbike.net
BikeMotorKit.com
Bicycle Sales & Service, Bicycle Engine Kits in Los Angeles
Custom Motorized Bicycle Sprockets
Motorized Bicycle Engine and Parts
TheJakeBike.com
GoldenMotor.com