View Single Post
Old 01-14-2010, 11:08 PM
2door's Avatar
2door 2door is offline
Super Moderator
Join Date: Sep 2008
Location: Littleton, Colorado
Posts: 16,221
Default Re: Backlash question

Shimming works on helical cut gears, not straight cut ones like the ones in a Chinese 2 stroke. Helical gears have rounded surfaces that when properly spaced or positioned to each other relative to the curvature of the gear tooth will run quieter and more effeciently. Straight, or square cut gears mesh at the same angle so shimming either the drive or driven gear in or out will not have any effect on gear mesh only the amount of surface contact. Hence no noise reduction. This is an over simplication of gear engineering but I hope it answers your question.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"

Last edited by 2door; 01-14-2010 at 11:10 PM.
Reply With Quote