I'm starting this thread to get some of the more relevant technical info out of JM and into a wrenchin' forum. Anyone with 2-smoke experience is welcome to chime in. I'm in the process of acquiring a 2003 Stella with 115 miles on it, and 5 miles on a new kit. The kit is a Pinasco 177, 24/24G carb, and SIP expansion chamber. Not sure which main jet he's settled on at the moment--110 maybe, though this kit usually calls for a 118-124. When I get it home, I have the option of putting the stock parts back on, or breaking in the new kit. This will be the first air-cooled 2T motor I've worked on-- my RZ350 was pretty bulletproof. Anyway, I'll probably be bouncing back and forth between the Stellaspeed forum and this one. There are a few experienced tuners there, but since there's such a huge pool of know-how here and there's a few 2T scoot owners in our midst, I thought I'd get this posted to get the ball rolling. Any wisdom on how to do this sort of thing? I know I'll be doing some plug reading, but is there any routine to this that takes some of the guesswork out?