sparkplugs fouling

[McFall]

I just got a 86 250r it was just rebulit it runs really good but it goes through 1 sparkplug every one tank of gas. I dont know what the problem could be. Can someone help me?

[Master LTR450]

your jetting?? Hows the plug look when you pull it out? Also what r u mixing your gas at?

[McFall]

The plug is black about half way down, then after that it looks like new.

[McFall]

I mix my gas at 32:1

[Master LTR450]

if it looks like new then how is it fouling? whats your jetting at do you know?

[McFall]

The plug is black. It has stock jetting.

[Master LTR450]

sounds to me like you need to fix your jetting. Is the bike stock? if not whats done to it

[86 Quad R]

at this point the best thing to do is to cover the bases and start with a leak down test to see if the crank seals are bad. if that checks out ok then do a plug chop to determine which circuit needs attention as for as jetting.

[HondaRaceReady]

Maybe you're not riding hard enough? Letting it idle too long? Not shaking up your gas + oil mixture enough?

[2muchquad]

yeah check your jetting,if your just puttin around then it could be loading up on you.If your jetting checks out,try a step hotter plug,are you using a b8es?i think the 88 and 89s called for a b9es.