Hi,
I have installed 30mm Mikuni carbs on my Solo's from a 1991 Indy Lite Polaris sled. It was a dual carb set-up on a 340cc fan cooled 2 stroke engine.
The engine starts easily, idles nice, and revs up to 5500rpm with no problems whatsoever. The plugs are a light chocolate brown. The original high speed jets were #160. I am up to #360 jets, and it runs close to 1400 degrees which is hotter than I like it (the probe is about 2.5" from the cylinder, which may show a hotter temp). Yet the plugs show a light chocolate brown colour. My question is, why should there be such a difference in jet sizes from a 340cc engine which is like, 170cc/carb and the Solo 210cc engine for one carb? Thanks Daffy