Alright I have searched google and the forums. I feel these 400 ATís arenít talked about much.
I did a timing chain and tensioner on a buddies rancher he bought from some guy. When I got it the top end was off with a bent valve. So I replaced the valve and removed the rear cover and replaced the timing chain and tensioner.
Itís running and moving but it reva really slow even in neutral. Valves are adjusted and carb is clean as a whistle great spark!
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Think Your saying it revs really slow even in neutral ?
Are You sure the carb slide is opening fully ?