jetting A PWK for a 2002 CR250

[rcpilot_971]

I have a 2002 CR250 with a FMF fatty and v force reeds other than that its stock stock I run vp 110 at 40:1 at about 400ft ELV dose any one know where a good starting point would be for getting this thing jetted


Thanks Tim

 

[soulmate33]

My '02 CR250 has:

My 38mm PWK has a 48 pilot and 180 main.
I'm at sea level here in Hawaii. At 2.75 turns out it is still a little rich.

I'm gonna drop to a 45 pilot and 175 main. Stock needle (for a 2000 CR250).

 

[rcpilot_971]

is it rich through out or just on the top end

 

[soulmate33]

is it rich through out or just on the top end

Both....I actually don't mind running it slightly richer, the motor runs cooler and hopefully won't have to worry about seizing the motor leaning out.I'm still running the same plug from last year.knock, knock on wood......

 

[D36-108A]

175 main, 45 pilot, DGK needle with its clip in the middle position, adjust airscrew to suit. BraaaaaaAAAAAP! Crisp, clean-running power from just above seal level to above 5,000 feet. Pump gas isn't a problem but I prefer to run race gas, and I put many hours on a single plug. Easy starting, never fouled a plug, blah blah, rave, rave.

 

[t300]

2004 cr250 jetting

2004 cr250r other mods, fmf fatty , fmf q-stealth, v-force 3, boysen exaust flange, keihn pwk 38mm of of a 05 yz250

stock cylinder pwk conversion
pilot - 42
needle - cej 3rd
main - 175

now running

terry varner modified cylinder and head
pilot - 40
needle - cej 3rd
main - 175
110 leaded race gas 50/50 with 92 premium gas
bike is a rocket.....

 

[CR3999]

JD jetting has or did have some nice needles with there jetting kits that are sweet. Try jdjetting.com .