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RE: After warm up engine sluggish backfires badly...........
C90bikefan said 2010-01-18 20:48
Have same problem with misfire, had bad tank of petrol, now drained and new petrol, but still bad backfire and misfire on idle. Also have words CHEC in display when I power off the engine. Any advice on this. I have a 2007 C90 with Cobra slash pipes the rest is stock std.