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cm400t

  1. Electrical Issues
    Hey, I have a 1981 Honda CM400T, i hadnt run it for about 2 weeks (just busy) then a few days ago went to start it and nothing. I push the starter button and not a single sound is made, no turning over, no solenoid click, but the headlight dims as well as ignition lights. I am able to bump...
  2. Engine Discussion
    Head gasket is leaking and the leak is accelerating to the point where I can't ignore it any more. Maybe the gasket between the cylinder and the crankcase, too. I want to replace those, and I figure if I start pulling gaskets off I gotta put all new ones in when I put it back together. I do have...
  3. Miscellaneous Discussion
    I'm looking for recommendation for replacement sprockets for a 81 CM200T looking to get a little more top end speed out of the small 200 with 4 speed gear box? Any recommendation?
  4. Member Introductions
    Hello all, As the title says, i've followed a lot of tech advice and general discussions on this site for a while and decided it was time to finally do this properly and join. This year i purchased my 2nd (and 3rd) bike and it's been a challange but a fun one. I live in upstate NY so the riding...
  5. Electrical Discussion
    I'm took my CM400t completely apart. Every nut and bolt. Good or bad, here I am. But, as a matter of course, I am rebuilding and repairing everything as I put it back on. I bought a rebuild kit for the starter and am replacing springs, brushes, gaskets, bushings, etc. but I noticed a problem...
  6. Non-Model Specific Honda Twin Topics
    Hi all, recently traded my 1980 CB250 Superdream for a similar-aged CM400T. I like the styling, the quality of the build and the extra cc (obviously). Seems to start very easily, which was the main reason I wanted to change. Removed all the luggage clutter (panniers, rear luggage holder and...
  7. Member Introductions
    Hey everyone, I'm new here, and new to full size bikes in general. Having rebuilt a number of 2 stroke mopeds years ago I have a level of comfort going into my first project bike. I just purchased my first bike, a 1979 CM400T (model variant to be confirmed once I get possession in a couple of...
  8. Electrical Discussion
    Hello, First of all sorry in advance for my bad English I'm from Germany and not really into posting on forums :) I have signed up to this forum because I have a weird issue with my Dads '81 CM400T which is really annoying and I don't know how to solve it. After pretty much standing still for...
  9. Engine Discussion
    Hi, I have a 1981 CM400T that I bought off of Craigslist. I have began replacing the airbox with pod filters and have come across an issue with my carburetor. the carburetor I have is not the original carb. it's actually off of a CM450E. I had, what I thought was, the right size jets to rejet...
  10. Fuel Supply and Carburation
    Just got a 1980 cm400t. Was barely running and had sat for a long time. New coil pack, cdi box, battery, and wiring. Problem came when I rebuilt the carb and acceleration pump. After rebuilding it idles fine and at low rpms throttles fine, but if I crank the throttle back fast or hard it gets...
  11. Tires, Wheels, and Brakes
    First off, I'm completely new to the site and to working on Honda twins, so please bear w/ me. Anyway, I just picked up a 1979 CM400T and want to do a Tracker style build w/ some type of dual sport tire; however, I am having trouble finding many options for stock (18f, 16r) dual sport tire...
  12. Member Introductions
    Hello everyone, I’m from Vancouver, BC Canada. Pleasure to meet you all! I just bought a 1981 Honda cm400t, it was a project bike for the past two previous owners. Which means that it has got some work that needs to be done on it. I found hondatwins while I was searching for resources to learn...
  13. Engine Discussion
    The bike ran fine, better than ever, I was just fine tuning and was told clutch lever shouldn't be 90 degrees off motor should be about 120 or so back from front, so i changed it as described in manual. See attached image. The bike was in neutral when I changed the lever, spring and push rod...
  14. Member Introductions
    Greetings from North California. this looks like a great group! we have another Honda two wheeler. my first motorbike ever was an sl100 turned into a dirt bike. it was almost indestructible and was what i learned respect for life, limb, speed and aerial trajectory on. it never died- -c'est...
  15. Fuel Supply and Carburation
    The two carbs have been rebuilt and cleaned, been rejetted slightly, and the needle slightly shimed. Per a previous post recommendation. I checked float needles. These have the plastic type float. Anyway, I left the gas line on over night and the next morning when I went out to start it i smelt...
  16. Fuel Supply and Carburation
    Ive read the main sticky on rebuilding rejetting for pods, 125 and 90s.... and followed it to the T; less the 127.5 jet for straight pipes. I jetted with 90s and 125s and running pods off the back of carbs, no stacks, and headers only. So I really didn't follow the main sticky to the T. I get...
  17. Engine Discussion
    I'm doing my very first bike tear-down and build on a bike that a buddy of mine practically gave me. So, I decided that I want to try to do as much as I possibly can on this bike by myself over the next few years in order to teach myself and have fun. Engines have always intimidated me, but I...
  18. Wanted Parts and Bikes
    I've got a 1980 CM400t that I'm putting back together, and I've not been able to source a replacement right side (battery side) cover for less that $150. I know somebody out there has a lead on one of these, and any help would be GREATLY appreciated.
  19. Member Introductions
    Hello everyone, Thanks for having me. Here are a few pics of the CM400 I have been working on
  20. Electrical Discussion
    Hey Guys so I was working on my CM400 and having issues with the right cylinder not firing. While I was messing with it the spark plug wire came disconnected and the engine died. I have power to the lights but when I push the electric start button there is absolutely nothing. I pllled the...
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