fitz_the_viking Posted October 12, 2014 Report Share Posted October 12, 2014 having a look on a few sites and there are 2 chains for sale. a 428 and a 520. which the best for a late 70s montesa 247 cota? cant seem to find any info on it. many thanks. Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted October 12, 2014 Report Share Posted October 12, 2014 520 would be best but you will need the appropriate sprockets to fit ,,ie if it has 428 on you would need to replace sprockets as well Quote Link to comment Share on other sites More sharing options...
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