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NoQu4rt3r
 Post subject: Valve rocker arm
PostPosted: Sun May 31, 2015 9:31 am 
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Clutch Springs

Joined: Fri May 22, 2015 6:37 am
Posts: 9
Canada
Hey guys, my bike has been maling noise in the top end after I bought it and figured it was probably due for a valve job. Well, I found out the noise isn't the valves themselves, but the rocker arm, specifically the exhaust. It's extremely loose and the up and down movement is causing the rocker arm and stem to constantly make contact. I can't find anything in the manual on how to adjust the rocker arm firmness. Any ideas?


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mmiller
 Post subject: Re: Valve rocker arm
PostPosted: Sun May 31, 2015 12:59 pm 
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Racing ECU (!!)
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Joined: Sun Mar 23, 2014 9:21 pm
Posts: 535
Location: Parksville, BC, Canada
Canada
It sounds like you're talking about lashing the valves, which is a routine maintenance item on these bikes. Typically, the first lash is the most important as the cam/rockers/adjusters wear in during the break-in. It would be helpful to know what the mileage is on the bike (in the future).

See the attached file for how to perform the procedure :top:


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Valve Lash.xps [575.01 KiB]
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...because every day is MotoGP day when you own a CBR 125r...
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