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Valve Tappet Wrench Set

  • Thread starter Thread starter vur
  • Start date Start date
V

vur

Guest
Does anyone know the specific tappet nut (8, 9 or 10 mm?) and adjuster screw (3 or 4 mm square or straight) size for a '84 GS750 16 valve?

I am looking at purchasing the wrench set similar to that in the referenced web site.
http://www.motocrossgiant.com/Motion_Pro_Tappet_Adjustment_Wrench_Set_p/08-0073.htm

What to confirm if it will work for my GS (have yet to take valve cover off to confirm sizes). Looks like wrench set should cover pretty much any combination.

Thanks,

VUR
 
I have never had the 'pleasure' of adjusting valves on a 16-valve motor, but from what I have gathered here on the board, you will need an 8mm combination wrench to loosen the locknut. For the square adjuster, many are using a square-drive drywall-type screw that is inserted into a wood dowel. Much cheaper, just as effective, even if it isn't quite as pretty sitting in the tool box. 8-[

.
 
Never thought of using a Robinson screw head. What a great idea!

Thanks,

VUR
 
Well, I can't speak for anyone else, but I used a 9mm line wrench on the lock nuts. 8mm doesn't fit (just double checked).

Also, if you're lazy or cheap (or both), I just grabbed the little square things with my fingers and turned them.

This was on an 81 GS750 BTW.
 
I don't know the sizes offhand but believe the 9mm hex and 4mm square are correct. I own the Motion Pro set and it does include the correct sizes. It makes valve adjustment much easier than any other method I've tried. Motion Pro also makes some feeler gauges specifically designed for valve adjustment. They also make the job easier.

Thanks,
Joe
 
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