if you do a search there are a few threads about this
you basically cut lenghts of inner tube lay them over the rubbers and push the sprocket carrier back on so it wraps around the lobes
think its about �20 for the set from yamaha for that amount id just replace em

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K+N filter, snorkel removed, homemade kev mod (with his blessing), co raised,
Pipeworx cans, r1 led back light, under tray removed, small indicators, handguards, cnc short levers,