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  1. Clacking metallic sound coming from '81 Honda CM400C

    Motorcycle Repair
    Hi everyone, I'm having some disturbing sounds coming out of my bike and it seems to be getting worse. There is a high speed/high frequency clacking and almost sometimes grindy metallic sound coming from my '81 CM400C that I recently got (this is my first Honda). It was fine for the first...
  2. 1980 Honda CM400T bogs down on throttle

    Motorcycle Repair
    Recently bought a 1980 Honda CM400T which is in working order apart from this issue. When I give it a little throttle slowly and build it up I can run fine, but if I open the throttle quickly, for example, quick acceleration, it just bogs down and sputters as well as some backfiring and smoke...
  3. electrical issue with my 1981 CM400

    Honda
    my headlamp works, the turn signals work (when activated), the brake light works (when brake applied). what DOESN'T work: speedometer/tachometer illumination, turn signals are not 'always on' (when not activated), the back light. i checked fuses and obvious connections--seems to be ok. here's...
  4. How can I adjust how my engine idles?

    Motorcycle Repair
    My Honda CM400 T idles too low. If I take my hand off the throttle, the engine soon turns off. How do I adjust it? Thank you!
  5. Changing spark plugs?

    Motorcycle Repair
    I just replaced my spark plugs on my Honda CM400 T (with the exact ones that were on it previously. The spark plug wires no longer fit over them, because the new ones have a little thing screwed onto them. It looks like the previous owner removed these things on the last plugs. Can I remove...
  6. My cm400 build/rebuild

    Building, Restoration & Modification
    o here is my 81 CM400 Custom build/rebuild. I bought this bike a couple years back from an old manager of mine for $200 with new tires and bat. in it. I rode it as my first bike never really took good care of it cuz it frankly sucked! to my knowledge anyway. the last few months I have been more...
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