New to ATM!

[Lionhearted]

Hey everyone! This is my first motox forum, and I'm happy to be here. My names Jackson and I own a 99 Yamaha YZ250 and I live in Mid TN.

Looking forward to being apart of the family, haha.

Oh and if anyone can help me with any info about how to jet my bike it would be great, as I've never done it before.

It has a FMF Gold Series fatty pipe, Turbine Core II silencer. I'm running 32:1 and still acting up and the plugs are getting oil all over them.

Thanks!

[yzernie]

Welcome to ...this is a great place with a lot of knowledge.

As far as your jetting...

- you need to know what the stock jetting is and compare it to what is in the bike. During those years Yamaha jetted their bikes on the rich side to help prevent people from seizing them regularly.

- what is your elevation where you are?...higher elevation with require leaner jetting. What brand/type of oil are you using? Dino oils don't seem to burn as clean as synthetic oils.

- Is your air filter clean?...retricted air flow can result in a rich condition

- Is your plug the proper heat range?...to cold a plug can cause fouling

[AJ_YFZ]

Welcome to

[Lionhearted]

Originally Posted by yzernie

Welcome to ...this is a great place with a lot of knowledge.

As far as your jetting...

- you need to know what the stock jetting is and compare it to what is in the bike. During those years Yamaha jetted their bikes on the rich side to help prevent people from seizing them regularly.

Very true. But sadly I don't know... and haven't had any luck searching.

- what is your elevation where you are?...higher elevation with require leaner jetting. What brand/type of oil are you using? Dino oils don't seem to burn as clean as synthetic oils.

Elevation is 648ft and I'm running Yamalube 2T

- Is your air filter clean?...retricted air flow can result in a rich condition

Yep always keep it clean and oiled

- Is your plug the proper heat range?...to cold a plug can cause fouling

Should be. I'm running NGK BR8ES.
Would sure be helpful if I had a manuel.

As far as before jetting.. I think I'll switch to 40:1. If you think that will help out any.

Thanks so much for the help by the way and the welcome guys!

[yzernie]

Without knowing the answers to the questions I would say switching to 40:1 is not going to help. That will actually make the bike run richer.

[Lionhearted]

Oh guess you didn't see the answers. They were up there just italicized and hard to see. I but them in bold now as well.

Thanks for the help so far tho.