I am in 100% agreement with Gray on all his statements. I'll add that if you must be able to nail the throttle from idle and not have a bog, then the ALJ or a small LJ will solve it. But you have to have the oring mod or the stiffer sping, you have to have the AP timing right first. The big downside to using a small LJ (or ALJ setting) is excessive fuel use at higher RPMs. In fact, it can result in a high rpm bog due to an excessively rich mix. BTW, I install a O2 bung on all my bikes and use a five wire Bosch Lamda sensor to check/set primary jetting. The AP can cause as much as a 6 point jump in A/F!