'02 YZ250 setup

TMax

Member
Nov 4, 2002
56
0
Not sure this is the correct forum... Too many to choose from. :-)

Well, it looks like we are getting into racing again (finally!). My son has been off bikes for three years now and I picked him up a SWEET '02 YZ250. The bike is BONE stock, the original owner bought it two years ago and has NEVER rode it other than in his driveway a time or two. The tits were stil on the knobs on the original tires! Not even a scuff on the frame paint. Sorry to ramble, but we got this bike for 1/2 the price of an '04.

Anyhow... The bike was very rich and fouling plugs, I put in a 174 main and a 42 pilot (temps are currnetly in the 40s). I am interested in opinions on changing the needle? Any tuning with the PJ? I am running a B8EV plug now (B8EG was the original).

Any other "tips" on this particular bike? We did the basics... Bars, skid plate, frame and rad guards. I will be working with him at the track tomorrow (Wednesday) on setting the sag and adjusting the suspension... I figure he can get a few races in and see how he does before we spend any money on the forks and shock.

Appreciate any input. Thanks in advance!

TMax
 

bclapham

LIFETIME SPONSOR
Nov 5, 2001
4,340
0
run a resistor plug, BR8xx

ive got the 01, verysimilar motor, mines been ported and has always run rich, i am currently 42P, leanest needle, 170 main @25:1 and its still rich- i think a new needle will be the next step.

btw- check the float level before you make too many changes
 
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