cm400

Hi guys - I'm trying to get a 1980 CM400T running that has been sitting for roughly 30 years. I was finally able to get the old girl started today, but only the right cylinder was firing - left exhaust was cold while the right was piping hot after a minute or so. Things I've done so far are...

Hi guys, wondering if anyone can help my diagnose my leaking overflow on my right side carburetor. Some details below... Only right side carburetor is leaking, substantial leak upon start up (rebuilding bike and have not gotten to properly idle yet) When I removed it, bowl was full of gas -...

My $500 CM400 only idles on the left cylinder. I have adjusted valves, cleaned the carburetor 4 times, and changed the coil. It has good spark and fires when I rev it up, it just doesn’t fire at idle. I’ve even swapped all the jets and parts from the 2 carbs. The right side carb did look...

Hello everyone I looking for some guidance on my 1981 honda cm400t, mikuni vm30 carbs, using the duel outlet petcock from an older honda. The bike came to me and pieces and I have got it put back together pretty well, now just chasing my tail trying to get the carbs tuned right. Do yall have any...

Here is a public Google Sheets link to various o-rings, seals, and bearings used on these bikes. Should apply to CM450/CB450 in some instances. Cross-reference the part numbers to be sure. Any updates you have to the list or corrections please let me know and I will update accordingly...

Having trouble sourcing a Keihin VB22 30mm venturi to Canada. I was hoping I could test my luck here. Thank you :)

This is my first motorcycle, and I got it about 9 years ago. I'm generally a fan of the stock look, but my other vintage bikes are earlier (72 - 78) and the stock CM400C has cruiser accents that I personally don't care for, especially the stepped seat, shape of the side covers, and design of...

The frame was modified when I bought this bike. The seat was actually a ceiling fan blade with threaded inserts, thumb screws, and upholstered with snake-skin looking vinyl. I put thicker foam and black vinyl on, and it stayed like that for years until the rear shocks went out. We welded a...

I'm in the middle of making the wires, adapter, and bracket for someone. This thread has attachment limits per post, so I have to break it up. Here is how you do the spark wire and boots. Parts and Tools Required Dynatek DC11-2 Ignition Coil - Get it direct from Dynatek or an authorized...

Complete carburetor kit for your CM400/CB400 twin. Honda CM400 CB400 Mikuni VM30 Carburetor Kit New set of genuine Mikuni carburetors set up to your bike. We only use MIKUNI parts in our carburetors. Hands down the easiest and best way to get your vintage motorcycle up and running. Each kit...

Hey all, I saw a picture of a 82 Nighthawk 450 scrambler build, and I absolutely loved the look of the rear fender in particular. Would the rear fender cowl from this bike fit up with an '80 CM400t, or is it a lost cause? Here's the picture I saw in question: