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5 Posts
Hello everyone, and thanks in advance for your help.
TL;DR - Bike has no power, won't respond to throttle very well, can't exceed 10mph going downhill with full sail and a rowing team.
I picked up a 1979 Honda CM400A from a friend who didn't want it anymore. It's been sitting for about 3 years and I'm trying to get it up and running.
I contacted a couple shops, no one but a local place was willing to do work on it and even then they'd only do tires, battery, chain, etc. The easy stuff. So i had them do that, and now I'm working on the carbs/engine
I wanted to be lazy and pay a guy to work on it but no shops around me are willing to touch this because it's "too old". Well, I guess you don't get my money then guys. So I have to do this myself.
I already took out the carbs and cleaned them up, replaced the float bowl gaskets (they were trash), and checked to make sure the floats float. They do. I put everything back together and into the bike.
It idles, it seems to run pretty smoothly (put put put put put put), but when I put it in gear without revving a smidge it stalls. Once I've gotten a rolling start, it'll run but I can't get the engine to increase in RPM. It won't respond to throttle very much at all. I can't get going unless I'm already going.
However, when I put it back in neutral, it'll rev all the way up and back down again. It responds quite well too (I think, it's not snappy but it'll follow my lead so to speak).
Another thing I noticed is after I shut it off the right side exhaust spews just a little bit of smoke.
Any ideas guys? I'm not sure what to do. Do I have to take the carbs back out and do some adjustments? Did the guys who did my tires and chain mess something up?
Your help is greatly appreciated, I hope I can start riding this summer.
:71baldboy:
TL;DR - Bike has no power, won't respond to throttle very well, can't exceed 10mph going downhill with full sail and a rowing team.
I picked up a 1979 Honda CM400A from a friend who didn't want it anymore. It's been sitting for about 3 years and I'm trying to get it up and running.
I contacted a couple shops, no one but a local place was willing to do work on it and even then they'd only do tires, battery, chain, etc. The easy stuff. So i had them do that, and now I'm working on the carbs/engine
I wanted to be lazy and pay a guy to work on it but no shops around me are willing to touch this because it's "too old". Well, I guess you don't get my money then guys. So I have to do this myself.
I already took out the carbs and cleaned them up, replaced the float bowl gaskets (they were trash), and checked to make sure the floats float. They do. I put everything back together and into the bike.
It idles, it seems to run pretty smoothly (put put put put put put), but when I put it in gear without revving a smidge it stalls. Once I've gotten a rolling start, it'll run but I can't get the engine to increase in RPM. It won't respond to throttle very much at all. I can't get going unless I'm already going.
However, when I put it back in neutral, it'll rev all the way up and back down again. It responds quite well too (I think, it's not snappy but it'll follow my lead so to speak).
Another thing I noticed is after I shut it off the right side exhaust spews just a little bit of smoke.
Any ideas guys? I'm not sure what to do. Do I have to take the carbs back out and do some adjustments? Did the guys who did my tires and chain mess something up?
Your help is greatly appreciated, I hope I can start riding this summer.
:71baldboy: