So after around 20 miles of running, the problem was back. It seems like the same exact symptoms, lacking power, and the symptoms seems to have come on fairly quickly.
I believe the diaphragm might not be sealing correctly in the grove, I took it apart twice, the second time I put it back together with a small amount yamabond adhesive around the o ring, but still runs the same. I've ordered a new diaphragm but not sure if I should have ordered the whole diaphragm slide assembly.
I checked the valve clearances and they are within special. But I noticed a minor oil leak behind the left top engine access cover.
I wasn't really able to identify where it was coming from.
Any thoughts on either issue appreciated
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