XL600V Transalp "chain knock"

[BLIKSEM!!]

Ive noticed a 'knocking" sound coming from the chain or drive, when i look down i can see the chain jump.
Anyone have an idea what this is, can it be a bearing or just the chain and sprockets?

 

[Tommy Transalp]

 

[hardrider]

 

[JamesXRV]

 

[JIMBO]

 

[Hondsiff Honda]

 

[Lootch67]

 

[Beltzer]

 

[Hondsiff Honda]

 

[Beltzer]

 

[Hondsiff Honda]