Quote:
Originally Posted by vtrider
Well went to take the carbs off and found that the petcock has become faulty since I put the bike back together -- after removing the vacuum line and the fuel line from the petcock, fuel would continuously drain out, no matter the position of the valve.
I've got a rebuilt kit in the mail, thinking at the very least this won't be helping things, but I wonder if this could explain the problem by itself?
I'll get the carbs apart again and document things to get your take on the PO's setup / condition.
Thanks!
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Leaking petcock won't cause any running issues if you get full-flow when vacuum is applied. In reverse, if petcock doesn't supply enough fuel, then you'd get stumbling from certain RPM onwards. Bike won't rev past 8000rpms, for example. But it won't have momentary stumble in mid-range then pick up back to normal in high-end. This sounds like incorrect fuel settings with jets & needles.
Most common best-running config is downsize mains to 95-96 and shim needle with 2-washers.
http://web.archive.org/web/201703210...k-racing-cheap - scroll down to "The Nuts and Bolts" section, note: "close to perfect" is with full AreaP exhaust and factory jetting.
https://www.ninjette.org/forums/show...00#post1238900
https://www.ninjette.org/forums/show...84#post1250984
Racing Order - Dyno testing
https://www.ninjette.org/forums/showthread.php?t=55927 - Dyno Test %20 more flow and power with stock jetting