We just received, after much effort, DID 520VT2 chains and clip-style master links. Yes you read that correctly...CLIP-style master link. This is a narrow t-ring chain for the CRF250/450 R and X models. You won't have to use a countershaft spacer for this chain.
NOTE: The 520VT2 link is NOT compatible with the 520VT chain and vice versa. It may fit but DID warns against using them on a chain other then the one the line was made for.
Here's a link:
http://www.crfsonly.com/catalog/product ... ts_id/3092
Ken