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.

Brendan R

spark plug sootting up 2012 yz 450

4 posts in this topic

Hi there,

 

Would any one know why my spark plug is going black after only 3 hours of riding? I have been running two stroke oil in my fuel of 2ml per 20L of fuel as a I have been told this helps to lubricate the fuel pump. Could this be a problem or is the bike just running too rich?

 

Thanks

Share this post


Link to post
Share on other sites

The fuel pump doesn't need lubricating beyond what gasoline does, for openers.  Neither do your piston rings, unless your "gasoline" has a high percentage of ethanol in it.

 

Is the spark plug a C9RE or equivalent heat range?

 

Have these first 3 hours been cruising around taking it easy?

 

The last time you ran it prior to looking at the plug, did the engine reach full operating temperatures and stay there for 20 minutes?

Share this post


Link to post
Share on other sites

Do you mix 2-stroke oil in your truck gasoline to lubricate the fuel pump? Sounds like a silly idea to me.

Share this post


Link to post
Share on other sites

I have been running two stroke oil in my fuel.

Could this be a problem?

Stop doing that, check it again when all the oil is out of the gas tank.

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