98 yz 250 jetting specs

[roc0999]

I have a 98 YZ 250 w/ Pro circuit platinum pipe and scilencer and need to know if someone has the proper jetting specs for this setup? Thank you if you have this for me and have a Merry Christmas

[MX86]

stock jetting will work. if you worried about running lean go up one jet size on the main..

i dunno what stock is off hand if ya need i can find it for ya..

[roc0999]

yea if you can find out that would be great . I checked @ pro-circuit's web site and they only go back to 2001. I have been running it w/4 oz to one gallon of gas is that good or to rich?

[MX86]

pilot jet is a #48
Main jet is a #172

2000 yz250 stock

#50 pilot
175 main

2001 yz250

they switched needles from 2000
so the run a #50 pilot
and 178 main

[MX86]

oh and as for the oil. really depends on what kinda oil your using and what ratio you feel comfterable..

i run 6oz of oil to 2.5 gallons.. so 2.4 oz per gal. i run amsoil synthetic oils and they recomend mixing it at 50:1.. so really up to you..

[roc0999]

Is it the same for a 2000 as a 1998? Because my bike is a 98.

[MX86]

2000 they went to a new style carb. kehin pwk w/ TPS if ya look at the specs on my carb vs yours mine is wired to my CDI box to monitor throttle position. and i have a different style needle as well

for you the settings you should have in your carb is a #48 pilot and a #172 main

[roc0999]

hey thank you for your help in this matter. Where can I get a good deal on some vforce iii reeds?

[MX86]

for VF3's

ebay if your lucky

otherwise Rocky Mountain ATV has the best deal on em. but be prepared to spend triple digits for em.

[MX86]

V-Force 3 Reed Valve
Fits: 1998, YAMAHA, YZ250
Regular: $159.99
Our price: $129.99
Part# 1033310008

This item is In-Stock

this ought to help ya

from rocky mountain

FYI any V-Force 3 reed cage from a 1997-2008 yz250 will fit your bike