I have the dmc duals on my bike now. My jets are 138 in the front, and 142 in the rear. this is what dmc said to run. It seems like the bike slows down in the mid range and top end. I want to add a dimond G snorkle and a K&N air filter. what jets do I need to run for these changes. thanks for any help you have to offer me.

 

Try 145 front and 150 rear and see what that does.You may have to shim the needles with .20 washers.

 

Shim size would be .020