DID chain for many 125cc motorcycles e.g. Herald classic 125's, Mutt 125's, Mash 125's etc. these are by DID the highest rated chain Manufacturer. These come in a length slightly longer than some standard models therefore you can get a slightly larger front sprocket and be confident it fits, in some applications e.g. 13T front & 42T rear you may need to remove a few links out the chain.
PLEASE BE AWARE the chain lengths changed on some euro 5 models, if your bike has x2 mounting bolts for the riders footrest you'll require a longer chain than this one.