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Title: 400EX cam chain and/or valves Post by: QuadMAN2k5 on December 04, 2010, 07:10:35 PM I am pretty sure it is the timing chain... what do you think??
400 EX timing chain and or valves vid # 2? (http://www.youtube.com/watch?v=80hsRXqlzkA#) 400EX timing chain ticking noise (http://www.youtube.com/watch?v=d6QeRQ8QuNw#) Title: Re: 400EX cam chain and/or valves Post by: duroc825 on December 12, 2010, 05:01:28 PM Have you checked valve clearance? Either way put a crf400 or 450r (depending on your year) timing chain it it. My guess is timing chain.
Title: Re: 400EX cam chain and/or valves Post by: QuadMAN2k5 on December 17, 2010, 02:59:56 PM Yea there were several things going on, The timing chain was really stretched, the valves were off and the tensioner was broken, dont know how it managed to run, but should be up to to specs in a few days
Title: Re: 400EX cam chain and/or valves Post by: duroc825 on December 19, 2010, 07:28:15 PM ;) Guess it's a good thing that ya know your problem now. Unfortunately it's gonna require some work $ and downtime.
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