your main bearing maybe going. has it sort of gotten worse over time? if so,
this may be it, if it doesn't affect performance though, don't try to fix it
yet. only when your performance drops, then you take it apart. use my motto
on repairing mopeds and scooters "don't try to fix it if it ain't broken".
sounds dumb huh? well, you don't know how many people it's helped.
2000 Tomos Targa
1991 Tomos Bullet TT
1978 JCPenney Pinto
1976 Motobecane 40v Moby
>From: Aaron Martin
>Subject: HELP! Motobecane engine vibration.
>Date: Sat, 19 Aug 2000 12:04:14 -0700
>I have an '80 Motobecane Moby 50 with a Variator
>clutch. I seem to have developed an engine vibration.
>The vibration is not noticeable when riding the bike.
>It is the most noticeable at about 1/4 throttle but is
>faintly there at all times while on the kickstand.
>You can visually see the engine vibrating. I checked
>the rubber mount bushings but they seem fine. The
>engine runs fine; accelerates, pulls good, idles fine.
> I am afraid there is something internally wrong but
>as of now I do not know what to think.
> > >list.