Jetting Help please.....

[MountainMax]

I was reading the jetting start guide info here and they say to change the Leak Jet and the starter jet, however at the online Yamaha parts locator don't list the jets as those names so im not sure what ones to order.......

[dbailey223]

I found the parts in the online parts manual that I downloaded. I had to know where the jets were in the bike, then follow the little arrows to the right part and part number. I believe that they have been posted in this forum as well--you might get them by a careful search. I believe that Indy knows them like the back of his hand as well.

[Matty05]

try sudco or what ever that place is called......

[odonnks]

I wouldn't think you'd need to change the start jet, whats pointing you to that?

It its a problem at 1/4 or less throttle go for the leak and pilot jets.

[Indy_WR450]

Yamaha Part numbers for all of our jetting options:

MAIN JET

4MX-14943-42-00 .JET, MAIN (#175) AP 1

4MX-14943-40-00 .JET, MAIN (#165) STD 1

4MX-14943-91-00 .JET, MAIN (#168) AP 1

4MX-14943-41-00 .JET, MAIN (#170) AP 1

4MX-14943-92-00 .JET, MAIN (#172) AP 1

4MX-14943-93-00 .JET, MAIN (#178) AP 1

4MX-14943-89-00 .JET, MAIN (#158) AP 1

4MX-14943-39-00 .JET, MAIN (#160) AP 1

4MX-14943-90-00 .JET, MAIN (#162) AP 1

4MX-14943-88-00 .JET, MAIN (#152) AP 1

4MX-14943-38-00 .JET, MAIN (#155) AP 1

PILOT JET

4MX-14948-06-00 .JET, SLOW (#48) AP 1

4MX-14948-04-00 .JET, SLOW (#42) STD 1

4MX-14948-05-00 .JET, SLOW (#45) AP 1

4MX-14948-07-00 .JET, SLOW (#50) AP 1

4MX-14948-01-00 .JET, SLOW (#35) AP 1

4MX-14948-02-00 .JET, SLOW (#38) AP 1

4MX-14948-03-00 .JET, SLOW (#40) AP 1

STARTER JET

3TJ-1494F-13-00 .JET (#65) AP 1

3TJ-1494F-12-00 .JET (#62) AP 1

3TJ-1494F-14-00 .JET (#68) AP 1

3TJ-1494F-15-00 .JET (#70) AP 1

3TJ-1494F-16-00 .JET (#72) STD 1

3TJ-1494F-17-00 .JET (#75) AP 1

3TJ-1494F-20-00 .JET (#82) AP 1

3TJ-1494F-18-00 .JET (#78) AP 1

3TJ-1494F-19-00 .JET (#80) AP 1

LEAK JET

4JT-1494F-19-00 .JET (#80) AP 1

4JT-1494F-15-00 .JET (#70) STD 1

4JT-1494F-23-00 .JET (#90) AP 1

4JT-1494F-03-00 .JET (#40) AP 1

4JT-1494F-07-00 .JET (#50) AP 1

4JT-1494F-11-00 .JET (#60) AP 1

4JT-1494F-27-00 .JET(#100) AP 1

[MountainMax]

What is sudco? and i have not sucessfully found the part numbers by searching, too many posts i guess..... also in the jetting page for one temp is says to use #0 Leak jet, is that possible? or a typo?

[Indy_WR450]

To make a zero leak jet just take the stocker and silver solder it shut on the back side.

[Matty05]

What is sudco? and i have not sucessfully found the part numbers by searching, too many posts i guess..... also in the jetting page for one temp is says to use #0 Leak jet, is that possible? or a typo?

www.sudco.com

#0 leak jet - solder it shut!

Indy just posted the part no's for you!

[MountainMax]

Thanks for that awesome info,

[kskyles]

i wish indy was my neighbor.