Thread: XR650R Thread!
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Old 02-27-2013, 09:06 AM   #16208
Chopper Rider
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Joined: Jan 2005
Location: On a set of 50,000 mile tires.
Oddometer: 15,215
Originally Posted by nigelcorn View Post
Yeah, I'd planned on putting a new plug in. I'll see what's going on with the jetting. I haven't seen a lot of spark plugs before so I don't have much experience, but this does seem to have a lot more carbon build-up than the others I've seen.

I really hope it isn't burning oil, I've already had to deal with one bike burning oil that turned into a nightmare.

That one is worn out and it looks like it wasn't fully tight, close, but not fully...that's why the threads are black.

Check for a stuck open thermostat, it will make the engine run too cool and cause carbon buildup about like that.
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