i got an origianl chain and sprokets second hand unused for £60
you can do most of the fitting yourself and just take the bike to the shop to have the rivet closer for less than a fiver, if you enjoy spannering then go for it, if you dont it money well spent to have it fitted
take of the front sproket cover, my back sprokets was worn after 15K but the front was finished, it was also making a horible cluncking noise everytime i pulled away which has now gone
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