help with new BBk ---- please!

[sc00ter]

Another thing I just thought of, and this is actually very important. Did you do a leak down test after it was re-assembled? If you are getting air in anywheres then setting the carb will be extra hard to dial in. Heres the crazy part. The new plug wont really read a accurate color (as far as rich or lean) until you get some WOT runs on it first. The Moped Army website has a pretty good plug reading guide for tuning. So if the scoot wont do WOT runs then you have to get the basics down first so you can do WOT runs. I dont think down jetting the main is a wise choice, and Im pretty sure you will have to up the pilot. Tuning is part science and part patience. Oh, and I hate those "No number" jets! We use the factory jets to the brand of carb we are working with. I still think the belt is pulling into the pulleys early, meaning re-tuning the trans to match the bigger motor is in order.