loquin Well-Known Member Local time 7:33 AM Joined Jan 11, 2008 Messages 2,207 Location Mount Vernon, Ohio, USA Mar 26, 2009 #1 on the happy time engines, what is the shaft diameter of the engine sprocket?
MotorBicycleRacing Well-Known Member Local time 7:33 AM Joined Jul 3, 2008 Messages 2,311 Location SoCal Mar 26, 2009 #2 loquin said: on the happy time engines, what is the shaft diameter of the engine sprocket? Click to expand... a bit over 9/16" on a 66 cc Chinese engine or ~ 0.570" however an older bronze bushed 66 cc motor is ~ 0.580" and their sprockets are not interchangeable they also use different sized keys Last edited: Mar 26, 2009
loquin said: on the happy time engines, what is the shaft diameter of the engine sprocket? Click to expand... a bit over 9/16" on a 66 cc Chinese engine or ~ 0.570" however an older bronze bushed 66 cc motor is ~ 0.580" and their sprockets are not interchangeable they also use different sized keys
azbill Active Member Local time 7:33 AM Joined Dec 15, 2006 Messages 3,675 Location Fountain Hills, AZ Mar 26, 2009 #3 I went to measure and forbisher beat me at least I got the same thing !!! LOL