Quote:
Originally Posted by DannoXYZ
Why would that make it leaner? There's less air per fixed volume of petrol. Or more petrol per fixed volume of air. Richer.
Yeah, also go back to factory pilots. There's absolutely zero need to change that, all adjustments needed can be done with mixture screws.
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less air for a fixed volume of fuel= Richer that's correct But as that air heats up
it becomes Leaner the hotter it gets the Leaner it becomes
Lets assume it is perfect at idle when cold .... as it warms up the fuel air ratio becomes leaner and becomes so lean that it drops a cylinder.....
Most engines do not change the fuel air ratio that much when warming up
they start out slightly rich and when they reach operating tempiture they are just right.... if My bike was set correctly when it was cold then it would warm up to a leaner condition.... that may well be the entire problem ! idle airscrews set when it was cold and not operating temp.
( that bike does take a long time to warm up ! )
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Bob.......