Ma TT250H splutters and carries on at high revs - any clues as to the culprit? Am thinking maybe too small main jet, so got couple of bigger ones on way. Have heard the CDIs on these weren't terrific, but (and this doesn't rule it out) does the same thing on a replacement second hand one from a wrecker. What about other electric - plug cap? (have made sure its well connected to ht lead). ignition coil inside flywheel or that goes to plug? Stator plate location maybe?
