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Message: [QUOTE="tonyromero, post: 501589, member: 34180"] So as it things weren't bad enough as it is, I take the RM out again today and the bike just wouldn't rev. The more I accelerated it just choked and sputtered. It ran fine just yesterday and I have done nothing since then. So I suspected a fouled plug and replaced it with no success. However, the plug I used ( which the parts counter guy sold me after he looked up the part) was a BR9EVX rather than the one that came on the bike which was a BR8EG. Also , I used a 30:1 fuel mix yesterday and noticed quite a bit of smoke and spooge ( using the mobil 1 which supposedlyburns clean) so I tried 40:1 today. Is the fix as simple as using the stocker plug? If the plug was fouled (th original) which it appeared to be since it was black an oily, why would it have run well yesterday afternoon and poorly today? Anyway, any ideas will be appreciated. [/QUOTE]