did you ever look at the spark plug??? it wont be completely accurate because pump gas has too many additives and sh*t but its a good starting point...you can definatly tell if its running lean or too rich...


my bike ran like a champ but was still lean...bumped up the mainjet from a 150 to a 155 and now the plug is a nice choclate colour and runs better! before there was hardly any colour on the porselin part of the plug and tip part was like WHITE.....

 

You should always warm her up first. Let all the metals expand equally, and the t-stat open up.