Thanks Andy. My airbox lid is stock but I was thinking of either buying the Tyga modded lid or just drilling big holes like you mentioned. So if I do that, it sounds like sticking with the 138 MJ will be alright even if it is too rich (safer is better right?). The bike will see a few track days soon but I won't be hitting any really long straights so I'm more interested in crispy throttle and good drive (relatively speaking for 2-strokes) out of corners. Besides, I'll be swapping between the NSR and my NT650 so the stronger my midrange, the easier the transition between both bikes. Thanks again Andy.

Jae