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2005 Yamaha Bruin 350 4x2 help!

Matt3

By Matt3
in Yamaha ATV Forum

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Matt3

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Recently, I changed the timing chain. I lined up all timing marks and set valve lash at TDC.  The mark on flywheel was on point as well when I looked through sight hole. I started the engine and starter turned it over then it hit and stuck. I did it one more time and the same thing happened. I took everything off and saw no damage. I tried to turn it over by hand and same thing. It turns halfway or so and hits. I loosened valve lash and took crank gear off and it does the same thing. It will turn over clockwise fully but not CCW. It seems like the crank sub assembly weight is hitting the gear balancer weight. I can turn crankshaft CCW while turning the gear balancer CW and get it to go but feel it hitting something. I also can spin crankshaft CCW without crank gear on and force the engine to break past the stick. It’s not the piston.

Please give me some suggestions thanks

  • 3 weeks later...

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