Originally posted by LJW
Ol'89r,
Any ideas why people are having this problem with the YZ250f ?
LJW. I think part of the problem is the fact that there is not enough room down in the plug area for anything but the plug. If people get anything down there that doesn't belong like dirt, grit, etc., and then try to screw the plug in anyway, somthin's gotta give.
Also, it is very hard to see down there so, it's a good idea to take the time to pull the tank all of the way off and use a small mirror or whatever it takes to inspect the plug hole. A little anti-seize compound on the plug threads can't hurt and make sure the plug washer is in its proper place.
A little tip. When installing your sparkplug, take a short piece of fuel line or rubber hose just big enough to slip over the porcelain part of the plug. Push the plug into the hose and hold onto the hose to thread the plug into the plug hole. If the plug won't screw at least 3/4 of the way into the hole, back it out and inspect it. NEVER force it in with the plug wrench.
This works good when taking plug readings also because you can hold the hot plug by the hose instead of the porcelain.
Ok, now we are up to $ .04