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Can anyone tell me what year the GSXR750 went to a shim under bucket valvetrain? I have got a 1991 in my garage that I am working one and it has got an excruciatingly loud valve. If it is a screw and locknut motor i will dig in and adjust it. Shim under bucket......thats a different story. Last year for screw and locknut adjustment was 1990 wasnt it??
 

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Yes, 1990 was the last year for screw type adjusters....
-Karl
 

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Its just as easy to adjust the screw type as the shim type. all you have to do is measure the gap, subtract the gap setting thats listed in the manual, then grab the right shim and stick it in.
Bones
 
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