1985 atc 350x 38mm mikuni carb ?

[mcgyver331]

Hi ,

Does anyone know the proper jetting for a 1985 350x wth a 38mm mikuni?

[NOS_350X]

There is no proper jetting for any bike/carb. It changes from every bike, location, mods, tempature, Everything affects jetting.

[360X]

Elevation above sea level, ambiant tempertaure, humidity, mods to the trike, etc....all have an affect on jetting.....You can do some research and get it close and then dial it in from there.........:thumbsup:

[mcgyver331]

lol, I thought that is what I was doing...

I will post the current jet sizes and maybe someone can help a little from there, I just dont want to fry the motor.

I just had a 350x recently with a 38mm kehin I should have openedi up but it was running great.

[3wheelergod]

Just look at your plug, it will tell you more about your jetting than ANYONE! Black nasty=rich, white/gray or flaky=lean. BROWN is the color you want, darker than lighter if possible! What Nos350x was saying is right, all jetting is different. Looking at your old 350X wouldn't have told you what to do any more than your new ones plug will, just cause it has the same carb and is the same motor DOES NOT mean it will be jetted the same.

Just go out and run it hard (at full throttle, gear doesnt matter, just not first) for A FEW SECONDS, MAYBE 10 tops, kill it, and pull the plug out and look at it.
This way is ALOT better than just running it up in neutral cause it actaully has a load on the motor and you will get a MUCH better reading that way, cause after all, do you ride in neutral? or do you ride with a load on the motor???????????????????

[mcgyver331]

cool thanks for all the info, I really have no idea how to play with jetting, but I'm getting there.

[aviomech]

Here is a site I buy my jets from http://www.jetsrus.com/main_page.htm . Just go to the FAQ's on the left there is good info on plug reads and jetting. Hope this helps.