So im running along side my 12 year old stepson as he is learing to shift and learn the clutch and i notice the chain is vibrating up and down in a very jittery way. I tighten it up with the adjusters and notice it is still doing this. Upon inspection to my o-ring chain many of the links are stuck together,(will not flex) All the o-rings look good does it just need some extreme lube or do i need to get a new chain.