bike not starting and vibrating at low revs

[ypain]

Hi I need some help urgently .i moved up to an rs125 from an rs50 3 weeks ago and on the second week of riding my bike broke down .It wil start but only stays on for a little while and the engine keeps dying.Also when im in low revs the bike vibrates a LOT someone suggested the counter balance gears .Any help on these two problems would be greatly appreciated.Tried typing it in search but nothing comes up. :D

[samRS]

my copy and paste function dont work, so just search for 'Balance shaft' or something along that line and loads of results will come up

The balance gears being fucked would explain the vibration and are only about £15-20 to buy

[ypain]

ok thanks but what about the not starting thing .I think it might be the plug or the mixtures running to rich any ideas ?

[samRS]

obvious thing to start with is a replacement brand new spark plug, then work from there

[adds_isard]

ok fella, were in london are you?
id say if it vibrating it could either be the plastic gears or the the pressure plate in the clutch has cooked and the bearing isnt gone. both parts are cheap its just finding them. may be able to help if you live close.

[ypain]

im in sydenham south east london.But my bikes still stuck in wanstead east london.I should get it back tomorrow doe cos I've got breakdown cover

[adds_isard]

im in new cross gate. when you get it back and if you need help i dont mind having a look.

[Dutcho]

Take the side casing off and have a look at the plastic/nylon cogs to see if they have shattered.

[ypain]

yeh i will .I went inmoto in croydon and bought the balance gears and a new clutch anyway gona get my bike back down here tomorow and put them in and respray my bike lol all in one night :|