I have used everything from 112.5 upto 127.5 with the main jet and depending on which jet is needed i've needed to change the pilot for upto 5 sizes larger than standard too. What i'm trying to say is no 2 bikes are the same and just putting in a jet kit won't make these work correctly. Upto a whole day on a dyno has been needed depending how many times the jets need swapping around. 120 main is always a good start but make sure you dyno guy knows carbs. I have seen bikes where they haven't swapped pilots and compensated with massive jets and run massively rich and lost top end power. or set up top and had massively lean at the bottom. So beware it isn't for th DIY unless you have a dyno and know carbs. Alot of dyno's won't touch carbs as they only tne with a power commander!!!

i'm just using for normal riding. i read through in this site, there's 2 types of ring for the filter. if use the smaller 1, its for normal. if use big ring, its for tunning+race. so if i'm just using for the sake it can be washable, i just use the smaller ring + filter, thats it? like to confirm before order the filter. as oem is unable to wash.