Noticed today on my 1983 CX650C that at around 70 mph, the rpm gauge needle fluctuates 500 rpm and the speed gauge needle fluctuates 4 mph while the engine and speed appear steady. Vibration is normal. Noticed this on backroads and on interstate. Motorcycle and engine have been operating...

Hi everyone, it's been a couple of months since I bought my bike and am just now getting around to installing this thing. I'm having a problem with the RPM input (yellow cable) and don't know where to place it. The instructions say to wrap it around some cable between the CDI and the H.T. Coil...

I have an '81 Honda Cx500 custom. I am having some issues with her though. When I am in gear it won't go over the 3 on my rpm gauge. It hits about 2 1/2 and then kicks around and starts to buck like a bronco. I have some backfiring when it starts, when I have it in neutral it seems to be able to...

I got my cx500 a few months ago and first time I ever rode a bike was in february. However, I have a degree in mechanical engineering and have always enjoyed DIY stuff so I have some basic knowledge and am trying to do all the work myself. I've fully taken apart the carbs, cleaned them...