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Just pulled this plug from the front cylinder this morning before work, has about one take of gas on it. Looks slightly on the lean side, but then again I haven't had a chance to do a specific RPM plug reading.

I believe its a BN, I know whatever one it is, I've been told many times it's the crappy one of the bunch. The plugs are nice and dark brown, but they do foul out fairly fast, 4 tanks of fuel and their toast. Also I'm running that poopy 2smoke out board oil from Advance Auto in it, but I just...

So ive had this js440 for a while now and its always had this thing where 1 out of 3 rides, after about 2 hrs of riding she likes to act funny at low rpm. Runs great but after rippin it for a while (1min or so of full thottle) she wants to bog out if you let it go down around idle rpm range? I...