If your reduction case chain is making a popping / clicking / whirring noise, not running as quiet as it once did or "CLUNKS" when changing direction of travel, this chain is worn/stretched beyond it's service limit and ready to fail. If it fails while in motion the damage could be catastrophic when the rear wheels lock. Order replacements now to have on hand for the inevitable.
Please measure and verify the actual # of links or the overall length of your drive chain before ordering.
If the chain you need is longer or shorter, contact us, we will make one especially for your needs.