Remove the rear piston bell chamber and piston. Verify that the piston
can move within the piston bell chamber. Push it up all the way, and it
should drop by itself, from gravity. There could be a dent in the
bell, that
stops the piston travel.
I have also encountered either the remains of parts from a damper being
in the tube of the piston. And, have had one case where just oil residue
kept things from moving easily. Empty out the oil from the tube, and
look
inside. The "C" or "E" clip, and part of the damper piston, could be
inside.
Or, it could just need a good cleaning out, with carb cleaner.
John Seim
Irvine, CA
On Dec 5, 2011, at 2:12 PM, <wbeech@flash.net> <wbeech@flash.net> wrote:
> Hello list,
>
> Got the SUs cleaned up and replaced a couple of questionable
> seals. All
> back together, no leaks, jets centered, slides sliding. Now I am
> ready to
> fine tune and sync them up.
>
> With linkages disconnected I and rev the motor to red line with the
> front
> carb and watch the slide gradually go up until only about 1/4" remains
> visible. However, with the rear it won't rev all the way and the
> slide will
> only go to the halfway mark. Both slides move up and down freely
> by hand.
>
> Check for air leaks & float levels, all appears to be good trying
> to do
> everything by the book.
>
> Any suggestions?
>
> Thanks,
> Bill
> ______________________________________________
>
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