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what to do first
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Posted by: pnbsdad

I just bought a new raptor 250 for my son. I was just wondering what to do first to make it run faster? He may race it some this summer after he learns how to shift it. Thanks

Posted by: vondeister

pipe, air filter and Jet. don't forget nerf bars and a kill switch.

Posted by: pnbsdad

what pipe did you use?

Posted by: vondeister

HMF sport full system, nice performace gain w/ the jet.
it sounds great, pretty loud.

Posted by: forgiven

What jet size did you go with? Lid on or off? what filter?

Posted by: vondeister

170 jet, pro design buillit filer, lid on.

Posted by: forgiven

100 bones seems pricey but if you can move the main jet that much with the lid on it must do real well. Looks like a cheap uni knock off though so paying 80 bucks for the adapter seems tough to swallow but it looks like it may be worth it.

Posted by: vondeister

It does look like a UNI, you can run the GYTR filter with the adapter. i might get one down the road.
we are having a blast with this bike, with all the mods we've done he's tearing it at
local tracks.

Posted by: forgiven

what prompted you guys to go with the pro design over the gytr?

Posted by: vondeister

the guy I got my pipe from said they just got it in, so of course I had to have it. there is no end. we are getting Elka's next, we were not planning on motocrossing so much but this years TT sechedule is only 6 races. so now we plan on running some select MX events. we got this little raptor going so fast I had to go get a YFZ450 to keep up. I pick it up today @ 2pm I didn't get the R, they had grat deals on the 08's.

Posted by: pnbsdad

sweet we got a great deal on our 250. What mx races do you plan on going to?What do you guys thing about that gyr pipe that yama sells?

Posted by: wvspeedfreak

quote:
Originally posted by vondeister
170 jet, pro design buillit filer, lid on.

Is that the jet that HMF sent you or did you try different jetting and that is what you ended up with?

The reason I ask is we are running the same exhaust and the lid on and nowhere near that big of a main jet.

Posted by: forgiven

I think it has to do with the air filter. It must flow real good. I was surprised as well.

Posted by: wvspeedfreak

Must be.I have the GYTR air filter set up here I just haven't installed it yet.

Posted by: vondeister

i have not messed with the jetting as of yet, it does not runn as good with the air box lid off, maybe when the ambient temp is higher we could pull of the lid.

I have a FCR 33 that came in the kit I got with the head, cam ,and piston. but it ran bad withthat carb, i put the stock back on for now and it runs good, i plan to put the fcr back on and tune it with that

Posted by: dodgepower

hey pnb.........this is what we are moving too.......seen a great deal in michigan. might have to have you pick it up and then come see yall as a excuse

Posted by: vondeister

psb...where are you in michigan. I'm in metro detroit

Posted by: pnbsdad

Hey dodge come on up. you want me to take a look at it for you?
Von i live in Clarkston u?

Posted by: vondeister

i'm in trenton, south of detroit

Posted by: pnbsdad

cool where are you going to race this year?

Posted by: vondeister

onsted TT points series
morelands TT & mx this weekend and through out the summer
and any where else we can find.

u can email me
bdeister@motorcitysolutions.com