HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
dunecj2a

Black plug with FMF jetting specs?????

4 posts in this topic

Alright fella's I don't mean to beat a dead horse but I need some advice on how to read my plug. I'm runnin a complete FMF Ti4 system with there power up jet kit. I also have the Boyssen quick shot pump cover. I have it jetted to FMF's/Dynojet kit recomendations. I live in Tucson so I figure the jetting specs would be real close to FMF :D

I pulled my plug out after a month of riding every week. It is really black,dark black but the very end of the electrode has a small white spot. Can't hardly notice it unless you look hard. I swapped it out with an Iridium plug and put one ride on it. When I pulled it out it was really black also, but the tip was clean. So whats goin on here, am I really rich? Whats up with the white tip???

Share this post


Link to post
Share on other sites

Yes, I would definitely say your running to rich. I live in Nevada, and every FMF exhaust I have installed on bikes I used the stock jetting with. Most of the time the PowerUp Jet Kit from FMF only comes when you purchase an ATV exhaust.

Share this post


Link to post
Share on other sites
Alright fella's I don't mean to beat a dead horse but I need some advice on how to read my plug.

Okay, here's my advice:

Don't bother reading your plug. Your bike has an accelerator pump that squirts an unatomized stream of gas into the intake every time you touch the throttle, and even if it didn't, or if you disabled it to do a plug check, you have no real way of telling which carb circuit is making the plug look the way it looks.

Of course, you could disable the pump and do a plug chop, but that seems like a last resort type of effort....

If you are interested in optimizing your jetting ignore what the plug looks like and jet it to run the best.

My two cents on plug reading...

Other than that I second McGill's opinion, but extend it to most every aftermarket exhaust. The stocker is pretty free-flowing, if you jet it to run w/ the stocker swapping to an aftermarket is not likely to require rejetting.

Share this post


Link to post
Share on other sites

Alright thanx :D Yeah it runs good so I'm not gonna mess with the jetting. I can live with a black plug!!!

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0