Hey guys got a couple questions, i tried searching but for some reason it doesn’t seem to work on my phone. Have a 02 660 and am about to make a few changes and was hoping for help to get started. Currently it has an aftermarket pipe (not a complete system but its more then just the muffler) the brand is a Scripion from what i’ve found is for streetbikes but it will have to do since the wife aint gonna let me fork out the money for anything else lol. Also plan on doing an EHS airbox lid and R2C airfilter with a prefilter. and just wanna get an idea on what jet sizes to start with? I don’t believe it was rejetted for the exhaust as the previous owner wasn’t that knowledgeable and i get quite the backfire on decel if i get above about 15-20mph. Going to have my uncle who was a motorcycle mechanic for years check the valves and figured while i had it apart i’d make any changes to the carb i needed. So if anyone with a similair setup could chime in with what they are running, also the elevation is about 1200ft.

Sorry for the book just wanted to try and be as thorough as possible.

Thanks