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  1. #1

    Cool Help Needed Riva Valve Buckets for Yamaha 1.8L

    Hi,
    I was trying to fit the riva valve buckets on the below valve retainer and am having difficulties maintaining clearances.

    It appears that if I make adequate separation between the valve retainer and inside of the valve bucket we do not have enough clearance left between the cam lobe and the top of the bucket!!!!

    Click image for larger version. 

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    Thanks in advance.


  2. #2
    Guidoo's Avatar
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    There shouldn't be any clearance between the valve stem,shim and bucket. Only clearance should be between the bucket and cam. You'll need to swap out shims to get the correct clearances. Don't assume the Riva buckets are spot on as the factory buckets. Be sure to keep oil on those buckets or they'll stick.

  3. #3
    Quote Originally Posted by SVHOKidd View Post
    There shouldn't be any clearance between the valve stem,shim and bucket. Only clearance should be between the bucket and cam. You'll need to swap out shims to get the correct clearances. Don't assume the Riva buckets are spot on as the factory buckets. Be sure to keep oil on those buckets or they'll stick.
    Thanks for the response SVHOKidd.

    What the workshop is saying is the clearance between the inside of the bucket and the clearance between the top of the valve retainer is not enough.

    Has anyone got the same valve retainers as in the picture and using the riva buckets????

  4. #4
    Well. Found the problem. After market valves in head that are 1.3mm longer causing insufficient clearance.

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