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Old 01-28-2015, 07:00 PM
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mapbike mapbike is offline
Motorized Bicycle Elite Member
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: Curious about the engine, :question:

Originally Posted by frank66 View Post
ok i just slid my jug on and its a gt5a with a zaf80. i thought it was a zaf50 so i was wrong.

the piston sits very low on the deck!!! im shocked! it comes down way to far aswell. this is not good.... i need a taller piston. im shocked silly.

seems the problem you describe here is something all GT5 and Half Breed engines have, no way theze engines can reach full potential unless deck height is brought down, the extra low compression may be one of the reasons some people get such long life from these type engines.

the bearing aren't stressed nearly as much, personally I like the power and better cruise speeds even if it does shorten the life a bit.
I dont always ride WOT, but when I do..I do my best to keep the rubber side down..Ride safely my friends!
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