Just fired up my 78 cb400A for the first time since I bought it and have been rebuilding it. I haven't done any work to the engine, only mostly cosmetic and mechanical stuff like cables and brakes etc... Also rebuilt the carb.
It runs fine but still needs to be tuned. I did however notice this disturbing clunking noise on the top end at lower throttle speeds. I'm afraid I'm going to have to rebuild the top end just by the sound. But can anyone help me by trying to pin point it? Sounds more like rocker or valve noise than piston noise, seems to be right under the rocker cover.
Can't seem to upload the video from my phone here so I've attached a YouTube link of it. (Which hopefully works)
Thanks
Eric
Sent from my Pixel 2 using Tapatalk
It runs fine but still needs to be tuned. I did however notice this disturbing clunking noise on the top end at lower throttle speeds. I'm afraid I'm going to have to rebuild the top end just by the sound. But can anyone help me by trying to pin point it? Sounds more like rocker or valve noise than piston noise, seems to be right under the rocker cover.
Can't seem to upload the video from my phone here so I've attached a YouTube link of it. (Which hopefully works)
Thanks
Eric
Sent from my Pixel 2 using Tapatalk