Does anybody know how the carbs should be set up for 6000-7000ft. I am using dyno-jet needles & jets. My set up is no lid, K&N with pro flow, White Bros. head pipe w/R-series muffler, and JE 12.1 piston.

 

With the piston & no lid you should call Dynojet tech assistance 1-800-992-4993.

 

MOOSE I guess thats what I'll have to do. Just hoping someone on the forums was running a similar set up at higher elevations. (cuts down on the fine tuning)[img]i/expressions/face-icon-small-wink.gif[/img]

 

Try 140-142 and 142-144. Mine runs well with the 142-144 at 5000ft...but at 7000ft it starts hesitating a little.

 

Spoke to Dyno-Jet today they say the correct way to set up the Raptor is to leave the lid on with no holes, and cut the snorkle flaps. I would think you could free up additional HP by removing the lid & jetting accordingly. They say no.[img]i/expressions/face-icon-small-confused.gif[/img]

 

They are full of crap. They don't know anything about their kits past leaving the lid on and cutting the flaps.

 

You can see my mods. I don't have the piston etc but I do run with no lid. My 150/155 works great for me up to 6000' clip in the 2nd groove. Its a bit rich but not bad. No hesitations, burps or stutters. My days ride when I'm in the mountains takes me from 4500'-almost 6000' during the day. try the 148/150 that come in the kit and go 2nd or 3rd clip position to start. I'll bet you'll be fine. Ive been thinking of stepping back to the 148/150 myself, haven't done it yet though. Might not ever. LOL

 

Hey wshrdskn, I increased my jetting to the 150 155 and it seems to have even more power now. Did you do any changes to the pilots?

 

No I have stock pilots 3 turns out. When I go to 155/160 in the mountains its stumbles a bit when your throttle is wide open and you let off to 3/4 throttle or so. There is a stumble when I do that. So I went to the 150/155. When I'm in the desert the 155/160 gives me even more power than the 150/155 setup. I haven't tried anything bigger than that but, I will this winter. [img]i/expressions/face-icon-small-smile.gif[/img]

 

I went to Colorado last summer and ran 140/145s and had no problems. Highest elevation reached according to my gps was 10,200 feet. See signature below for how mine is set up. I kept the air box cover on.