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nashport_native
10-19-2006, 05:21 PM
yeah, yeah.
I know I bought a really crappy loud pipe, but its just till around spring time.

anyway my late year 05's drive train is stone stock other than dropping one tooth on the front sproket.

what jet should I look into getting to start with, also I hate how hard the bike is to keep running intill it warms up, what size pilot jet should I go to to help with this.

thanks
troutman561
10-19-2006, 06:25 PM
i think a 142 pilot would help u out on the idle but i dunno what main jet you would need for that pipe, im no jetting expert...
Mechanixx
10-19-2006, 06:58 PM
A 42 piliot will help starting cold.As far as main start with about a 165 and do a plug check.Here are a couple links for carb stuff http://www.exriders.com/vbb/showthread.php?s=&threadid=221742 http://www.hmfengineering.com/forums/showthread.php?t=497
Hope this helps.
nashport_native
10-19-2006, 07:07 PM
thanks, thats what I wanted to know.

do I need to remove the carb to change the pilot and main, or can I just remove the bowl with it on the bike

edit: guess I should have went to the links befor posting the last question :rolleyes:
Mechanixx
10-19-2006, 07:13 PM
Take it off the bike youll need to put a .032 shim under the needle jet on the 05 or get a dyno jet kit and set the needle jet in the kit at the 3rd notch.The 05 dosent have adjustable needle so a .032 shim under it will work Ive done it both ways either works.
troutman561
10-20-2006, 10:09 AM
Originally posted by troutman561
i think a 142 pilot would help u out on the idle but i dunno what main jet you would need for that pipe, im no jetting expert...

Why i said 142 pilot jet is beyond me lol.. i meant 42, sorry for that...
nashport_native
10-23-2006, 05:23 PM
what type of main jet do I need to order for my 05?

I just put the cobra pipe on and now I need to order my jets.

I am ordering a type 21, #42 pilot jet and a 155 main jet once I figure out what type I need
Mechanixx
10-23-2006, 05:34 PM
Jets for your 400ex (http://www.jetsrus.com/main_page.htm) there you go :devil:
nashport_native
10-23-2006, 07:02 PM
one last question, will switching from the stock air filter to a uni 2 stage flow enough air to need to move up a jet size?
Mechanixx
10-23-2006, 07:12 PM
Probley not I put a UNI on mine and never had to touch the jets.Just do a plug check after you get it all togther and run it.
nashport_native
10-23-2006, 07:32 PM
ok, thanks for all the help