I have a phbg 21mm on a 73cc reed kit
im far too rich at 1/8 to half throttle even with needle on top notch and a 30 pilot jet
someone has fitted a w16 needle which could be the problem - im about to change it to a W7, and the atomiser is a 262 AU.
I noticed the W16 needle is the same diameter as the W7 for the top half of its length and its only the taper that goes thinner hence richer.
my question is, at 1/8th throttle am I actually on the taper? ie is that metering my fuel at such a small throttle opening? or is it down to the atomiser which need changing for a smaller one.
I suppose I can wait till the W7 needle arrives but I could also order a smaller atomiser.
last question, is there much difference in atomisers should I go one size down to a 260 or will that not make much difference.
I can get the bike running fine at wot its just 4 stroking like mad on part throttle.