Accelerator pump quest in

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JJinSC

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How far in is this little plunger suppose to move when you fully press the throttle lever? Mine only seems to move about 1/8"

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It doesn't move much. The volume comes from the size of the diaphragm, and the bleed jet. The timing comes from the screw on the cam.
 
Thanks, so I want to check the timing on the activation on the a-pump. I know I have read how to do that somewhere but it is not in my shop manual for this model. Can't seem to find it anywhere on the forum here.


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Yep... they were nice to leave that out.

I would head over to Mikuni's web site, and they have all the data available.
 
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