[77misery]

I ride a 2007 400 ex.I am adding full HMF pro series exhaust, K&N air filter without air box lid, dyna f/s rev box.I ride at 800' to 1000' and generally ride in 50-90 degree weather. Just wanting to know if anyone could help me with the proper jetting and tunning on the carb.

 

[tomgodd]

www.HMFracing.com
I have a full HMF sport series exhaust, K&N air filter and no air box lid.
I run a 190 main and a 42 pilot jet. I live in Kentucky. I believe our altitude is around 650.

 

[Kj_walther]

if you are running dynojets, on there website it sais to run a 170 main under 3000ft. that is considering you are using their kit along with the airbox lid removed and a good exhaust system. That is their stage 2 jetting suggestions

 

[joeylowthers450R]

i switched to the 450 but i'm pretty sure i was happiest with 175 in my 400

im also below 1000'

more fuel is not always the ticket, the only time i got up to 190 was dead of winter - 15c