I just installed a Dynojet kit on my 650L. Big inprovement but when I do a roll on during full throttle in 2nd and 4th gear I'm getting a bit of sputtering? I pretty much followed the instructions that came with the kit. DJ165 main jet,spring and needle. The L has a UNI Filter,WB slip on, un-corked, smog removed. Looking for any tips or advice would be great. Thanks.