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Junior Member
I'm currently running my 400EX completely stock. Im going to put a K&N Air Filter, and a White Bros. E-Series Slip On, on my quad. Im just wondering how much I will have to change my jets in order to make it run well. Just thought I would ask before I start pissing around with it.
Thanks
Adam
Senior Member
When I had those mods, I bumped my main up to a 155.
2002 416EX -
JE 10.8:1 piston, HRC cam, FCR39, Ported & polished head, Sparks HD cam chain, CFM airbox w/o lid, K&N filter, WB e-series, PRM desert bumper & chassis skid plate, pro-design kill switch & power shifter, Renthal handlebars, ASV brake and clutch lever, Nac's P-brake block-off, GCD air scoops, Factory Effex graphics/seat cover, TCS Race Series front shocks w/ remotes, Big Cohoona shock covers, Burgard's twin row carrier, Burgard's rear beadlocks.
2000 Honda CR250r
2004 Harley-Davidson Fat Boy
Junior Member
I live at sea level and am running stock engine e-series slip on, k&n filter with modified airbox. I run a 160 main and drop the clip one position on the needle. It runs great! hope this helps!
Registered User
I have an w bros R4 and K&N filter and ive been running 155 man jet...
05 walsh trx450r - sold
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