Jetting reassurance...

[flatl1n3r]

Ok sorry this is a noob question but, this is my first try at jetting. I just got done reading some of the articles here so I want to make sure Im buying the right jets...

07 400ex Uni air filter(w/ lid on) and hmf exhaust. 1000ft elevation, temps are between 70-90f summer and 30-40f winter. So am I good with a 40 pilot and 152 main, or should i go 42 and 155? Thanks for the help!...

[400exrider707]

Try 40 and 152 for summer and 42 and 155 for winter. I would also try moving the clip on the needle down one notch.

[hornetgod13]

With the lid on a 40K Pilot jet will be fine. I bet either a 152K or 155K will be what you need. I would start with the 152K.

[hornetgod13]

Originally posted by 400exrider707
try moving the clip on the needle down one notch.

2005 and Up 400EX quads have non-adjustable needles. A needle adjustment should not be required with your mods anyways.

[milburn]

42 and 155 works good on my o5 with lid on and moded air snorkle the 42 pilot makes it start up alot easyer

[Mechanixx]

I run a 42 piliot 152 main and 1 up on the clip down 1 notch with lid on and a UNI air filter.

[flatl1n3r]

thanks for the help guys, greatly appreciated!