I have about a foot of RK 520 EXW chain if its any use, brand new off the chain I have put on the old XL250 yours if you want it if not it will go in the bin
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Riding with enthusiasm upon the ragged precipice of disaster
Out of interest, how did you find the THC chain? They are cheap but the one I have registers as good on my chain wear indicator sprocket but all the rollers appear loose