Bad vibration, help!!!!

[leezy_1]

I have what i think is a 50cc china girl engine, its been fine for a good while but it seems to have developed a bad vibration at high rev's, could any know what this could be..???

i have a feeling big end bearing but not sure, any help would be most appreciated.

thanks.......

 

[NunyaBidness]

Check to make sure the mounting studs are not broken.

 

[leezy_1]

hi. no studs are ok ive took engine out of frame.......

 

[mekano]

Vibes are common... Use rubber material between all metal fittings to the frame, like a couple of layers of tubing... If it is good vibes that is...

 

[leezy_1]

no this is a bad vibe, its been fine without rubbers for a good while,but now im getting quite a bad vibration on full throttle..?

oh well.....

 

[leezy_1]

Vibes are common... Use rubber material between all metal fittings to the frame, like a couple of layers of tubing... If it is good vibes that is...

it was the ring gear in the clutch that was loose....