Then you have a 4 valve head and your bike is much different from the US bikes. Not sure how a 2 into 2 exhaust would work on a one cylinder bike....no one has done that as far as I know. I would do one thing at a time, carb and jetting first. I would also look foor a pumper carb, not just a non vacuum carb. Pumpers work the bomb on thumpers.