jetting 450r?

[mxva5413]

Ok I've got a '05 Black 450R w/ HMF full exhaust & uni-filter....right now it's gotta 170MJ how far should I go up? Feels pretty good now but I think I could prolly get a little more power by upping the jet size? Maybe a 185 or 190???

You running with or without the air box lid?

[wvspeedfreak]

He must have the lid off.I put a 170 in mine with an exhaust system and the lid on and it wouldnt run for chit.I would say try a 175 and do some plug checks.

[mxva5413]

Originally posted by TRX450R_Racer
You running with or without the air box lid?

Off

[Duncanracer]

i run HRC lid, K&N's and a full Duncan system and I run the HRC needle, stock pilot and 180 main....