View single post by Tom Bradley
 Posted: 08-12-2020 06:48 am
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Tom Bradley

 

Joined: 07-15-2013
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 The first thing I would check is the fuel pressure at the carbs. This should be less than 3.5 PSI. More than this and the fuel could be forcing its way past the inlet needle valves. Less than 2.5 PSI I think is better. Depends on the condition of the inlet needles.

Other possibilities are:

The float set too low, making the fuel level too high. Nowadays I set this to 17mm or even a bit higher.

The fuel inlet jet(s) are leaky and need to be replaced.

Other things you mentioned probably are not the main issue, however...
The damping force when pushing the damper up depends on the oil in the damper. Make sure they are topped up with 20W50 oil.

If one of the dampers does not fall all the way back down, it may be slightly misaligned. Try loosening the screws holding holding the top on and see if the damper will drop down. You may have to move it around a bit. Once you find a good position, carefully tighten the screws a bit at a time to keep the top from shifting position.

The throttle return springs are not that critical. As long as they are strong enough to consistently get the throttles to close back to the stop position they should be OK.