Vibration

[MattJ]

I started biking in February this year and got myself a 2002 Honda CG125 with 9500 miles on the clock. When I got it, it had quite a serious vibration/knocking problem when letting the clutch out to set off. Made the problem less intense by lubricating the clutch cable and also setting the chain correctly. But the problem didn't go away completely. This is only from setting off but it doesn't just do it in first gear (if I try to set off in 2nd and 3rd it does the same).

The bike had pretty much new chain and both sprockets when I bought it, I think they have been on the bike for about 1300 miles now. This vibration doesn't bother me too much, but it can make slow speed movements very annoying. The vibration itself is felt throughout the whole bike, but I can feel it a lot more on the clutch lever.

I have also just noticed a thread on here about a CBF125 vibrating. My bike also does this but it never occurred to me as a problem. I just thought that it was a characteristic of a single cylinder engine. It doesn't bother me and I barely ever notice it. Should I look into it?

Any help will be greatly appreciated.

[Frost]

Singles do vibrate, on a 600 it can be noticeable, but on a 125 it will just be a buzzing in time with the revs rather than feeling like your sat on a washing machine. In your case i don't think it's the engine that's doing it. It sounds very related to the clutch, chain, cush drive, wheel bearings and brakes. Or it might just be that you're crap at clutch & rev control. Provided it does it when other people ride it, and doesn't do it when you ride other bikes i'd say its certainly not the latter, probably isn't anyway. Provided it both wheels spin freely after you've put the brakes on then that elimates the brakes. You say you did the chain, but it needs doing regularly the sprockets might also be hook shaped and catching on the chain. Adjusting the clutch so that it is completely disengaged when the lever is pulled in is very important. I had a 600 that was bouncing the chain up and down when i slowed to the stop. I check everything and was going mad, then i adjusted the clutch for no real reason and it was fixed! So you might want to get the clutch cover off and inspect the plates and check the springs and stuff.

[MattJ]