Is it bad to drive like this??

[nyyankees3511]

So i just recently sold my 250 and picked up a 400, it has a dg full exhaust and k&n with outerwear. So i checked the jetting and its 148 and 38 which is stock i believe. Is it very bad to drive it like this? Also what jets should i get? Thanks

[Twistedmetal696]

what i would do is go buy a jet kit and play around a bit and see where it performs the best

it wont hurt it to run it like that a few times but I would deffinately buy some jets otherwise you will wear stuff out from the heat. I ran a E-Series slip on and it ran decent not being jetted but I only went riding with it maybe 3 times or so, no damage done.

[STUNTIN400EX]

i would get on dg's site and look for what they recommend for your model with a full exhaust. i run a 40 main and a 160 pilot

[elmer91]

Originally posted by STUNTIN400EX
i would get on dg's site and look for what they recommend for your model with a full exhaust. i run a 40 main and a 160 pilot

i would do this also, but you also have to keep in mind that it may not be exact, you may have to still play with the jet size.

[nyyankees3511]

On their site they say to increase the main one size up. So would that be a 150? Also you think i have to touch the pilot or can i leave it at 38?

[BigBore24]

you have your jets mixed up. the stock main is 148 and the pilot is 38. so up one on the main would be 150, but i would recommend going a little higher than that. maybe get a couple jets from 150-160 or so. i would also go to a 40 pilot. you can get jets pretty cheap at jetsrus.com

[nyyankees3511]

Youre right haha my bad. Ive done some reading and ive seen a 40 and a 155 would do the trick.

[wildyellow400]

I just put in a 155 main and a 42 pilot works good