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  1. CBR250 Problems and Issues
    I’ve got a 89 mc19, went over it cleaned the carbs, synced them, afr to 1 5/8 turns as per spec, coils test good, leads and plugs replaced. Still at idle it’s all over the place with a small miss, then at full throttle is quite gutless, hits 14k rpm, has power between 14 and 16 then breaks up...
  2. New Member Introductions
    Hi all, new member who has spent a lot of time in the forum reading. I have an issue where I can’t rev past 14 to 16k rpm depending on the gear I’m in. I’ve found similar threads although no one has posted the issue once found. I’ve done all the usual, carb balance, fluids filters etc. would...
  3. Honda CBR250 General Discussion
    Hello. First post so here I go: i have just successfully rebuilt a Honda MC19. New pistons, new rings. Valves and head done by a professional. New spark plugs. Everything is put back together to spec. I broke the engine in and it runs and idles fine. The carburettor has new jets and gaskets and...
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