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Fast Eddie

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Oct 4, 2013
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On the uphill runs, at WOT in third gear, it lost power. Slightly backing off the throttle, power returns immediately. That was the indicator that the mains are a bit small. Will take another look at float levels.
Agreed. That sounds like mains.

Float bowls take a little while of sustained WOT before they empty, then they take a little while to refill and resume fueling suites as well, so quite different symptoms.
 
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Oct 1, 2018
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Back to the Vincent: Pulled out the 290 mains this week and installed 300's. Much better response at WOT and even a bit better mid-throttle.

I usually turn off the fuel just ahead of pulling into my driveway and then running the fuel out idling before putting bike away in the garage. The front cyl was dying out much earlier than the rear which sounded like a low float level. It turned out to a plugged idle air jet that took 90 lbs of air pressure to clear! Took it out for a ride yesterday and was pleasantly surprised with the jet change. :)
 
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