[dwm450r]

Just installed K&N filter / outerwears cover / dynojet kit. With airbox lid removed instructions said to plug in air jet, and use 170 main with stock exhaust. I bought a 2 inch endcap on ebay and tried it yesterday. seems fine until i get in high rpm's in any gear and it flattens out or bogs down. Just wondering if i am running too lean for the endcap?

 

[Novanuttz]

sounds lean to me with your setup, 170 is too small. if you are at 3000' or less try a 180 and if you are 1500' or lower go with the 185. needle should be okay if you're not bogging at half throttle, but I would still do the plug check at full and 1/3 throttle anyway.
Good luck.

 

[Outlwd]

There is an existing thread on this subject already. Check some older threads. From what you say, though, I believe you are too lean. But, please check the other threads, before taking my word.