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  1. 1979 Honda CM400a Hondamatic

    1979 Honda CM400a Hondamatic

    My second bike. Had original hard bags that I moved to the 750. Has a Vetter Quicksilver fairing
  2. WTB: 1979 CM400A Carb Intake Insulators and Mufflers

    Wanted Parts and Bikes
    Hello, I replaced the carb intake insulators on my 79 CM400A a few years ago with some aftermarket ones from an ebay vendor and they're already getting pretty ratty. Does anyone have a good used set? I also need the left and right mufflers, both have holes in the bottom. Seems to be a common...
  3. CM400A Torque Convert Issue

    Engine Discussion
    I recently purchased an 81' CM400A hondamatic. The bike breaks up when you go to give it gas in first but if you switch to second it will move but will bog a bit. Looked through the shop manual and saw a fix being to replace the torque converter. Purchased one and replaced the part but now I...
  4. Honda Cm400A Hondamatic starts revs and wont shift to 1st anyone know anythign

    Member Introductions
    Hello, My names patrick, I just purchased a 1980 Honda Cm400A, It ran very well up until Monday and im trying to teach myslef how to fi
  5. The wife and I just got a 1979 CM400A.

    Member Introductions
    Greetings all, My wife and I have been wanting to get a bike for years now. I rode as a kid, but it has been 20 years since I have been on a bike (until yesterday) and my wife is in pretty much the same boat (she is also a tiny lil woman.) We both love Hondas, and wanted to start with...
  6. finding OEM rebuild kit for VB24A carburetor

    Fuel Supply and Carburation
    My dad and I are working on a 1981 Cm400A recently bought a pair of VB24A carburetors to replace the original ones which were broke. I have been looking for a rebuild kit to go though the thing, and poking around here I have herd aftermarket ones may not have the right jet sizes or vary...
  7. Cm400a compression issue? (Vid included)

    Engine Discussion
    my bikes still not running! Surprise surprise lol. Fixed spark, fixed tank (replaced), replaced battery (could still be an issue) and now it seems like i have a compression problem? Seems like im loosing air through my right spark plug, theres a distinct hiss when i try to start it, notice its...
  8. Odd Noise From Battery Area? (Vid Included)

    Engine Discussion
    I just can't catch a break! Here I am yet again fellas, fixed my no spark problem...fixed my theres a problem with the battery area on my cm400a (at least that's what it sounds like) here's a vid from YouTube. Happens when I push start, wasn't getting a response kickstarting. Notice...
  9. Original Mirrors 1979 CM400A?

    Miscellaneous Discussion
    I have a question...what did the original mirrors look like on a 1979 CM400A? The mirrors on there now are tiny round and vibrate out of usefulness before the bike is out of the driveway. I've seen 3, 4 and 5 inch-round, oval and rectangles with straight and bent mounts... all claiming to be...
  10. cm400a wont turn over (vid included)

    Engine Discussion
    Ironically enough two weeks after inspection bike has problems haha. The video pretty much says it. Regardless of kickstart or battery start it refuses to turn over. Try your best not to get jealous by my dog-chewed work sneakers :D It's been running fine all month, last ride was 3 days...
  11. Tire recommendations for 1979 CM400A?

    Tires, Wheels, and Brakes
    I started researching tires for the 79 CM400A and I am having troubles. Some folks are calling for tube tires, some tubeless (it's got tubeless on the Comstars now), I can't seem to find a matched set, a lot of the recommendations I have found are obsolete and no longer made or the links are...
  12. A bit old

    Tires, Wheels, and Brakes
    Putting together the punch list of jobs to do on my new 1979 CM400A, and I noticed a chunk missing from the rear tire when I got back from a quick ride around the block. Since I'm listing jobs anyway, I take a closer look at the tires (that I was assured are fine - bet you didn't see that...
  13. 1979 CM400A - What to look at first?

    Engine Discussion
    I recently got a 1979 Honda CM400A, mostly for my wife to learn to ride on, but also because I love the look and the Hondamatics always seemed cool.... Anyway...the previous owner had a meticulous garage full of all sorts of vehicles and was doing maintenance on several when I arrived for...
  14. Unintrusive Preventative Care and Maintenance Tips?

    Engine Discussion
    OK so- I would like to know some tips any of you have to keep a bike in better shape without taking anything apart. For example user "frogman79" advised in a previous post to clear out the carbs before parking by just turning off the fuel a block away from home, something I had never...
  15. You wanted an intro, here's your intro!

    Member Introductions
    Name's Danny.20. Student. Pittsburgh. I grew up in the city but always loved bikes, knew nothing about them, no one in my family rides so it wasn't an inheritance thing. I just always thought they were the coolest things in the world. I also always loved to drive things, I was the opposite of...
  16. 81 cm400t w/ guts of cm400a neutral switch issues / compatibility

    Electrical Discussion
    Hi there I bought a 81 cm400t with a 400a motor and transmission. When bike is in neutral the indicator doesn't indicate neutral but does when bike is in 2nd gear. I'm thinking it's the neutral switch on the transmission but not 100%. The bike kick starts in neutral but won't fire with the...
  17. Parting Out --- 1980 Honda CM400T

    Parts For Sale
    Long story short: I started a project in the fall but school and life caught up to me and I don't have time to really work on it and am in need of the money for my other venture (i.e. College) Basically everything is available but I'll post asking prices for a few of the major/more sought after...
  18. FNG in North Carolina: Thomas Hudson

    Member Introductions
    Hey there, FNG on the board here, I'm Thomas from Greensboro, North Carolina. I have been riding Hondas since I was a kid and still love them now. I've owned a few including a '83 XL100, a '78 CB550fourK, a '85 Sabre V65, and now a '81 GL500, and a '79 CM400a. I like the small displacement...
  19. Spark Plug wires question - cm400a

    Electrical Discussion
    Hello! My 81 cm400a has "cracks" around both of the "boots" (correct term?) that attach to the spark plugs. The one on the right I can lift off the spark plug with no resistance what so ever like it's just "sitting on it". The one on the left feels like it "clicks" up/down and it seated. I...
  20. Search for 79 CM400a right side cover - compatible cover

    Wanted Parts and Bikes
    I'm new here and hope maybe some of you more seasoned riders might be able to help me. I'm in search of a right side cover for a CM400a. It is my understanding that 78-81 (or 82) all fit the same. And that the CM400 and CM450 through those years fit the same. If anyone has one for sale, please...