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Old July 23rd, 2019, 08:19 PM   #27
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

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MOTY - 2018, MOTM - Nov '17
I believe these are the specs for chain.

20 Link length
Standard: 127-127.4mm
Service Limit: 128.9mm

Check tensioner as it should travel in one direction only. If plunger can go back & forth, it's broken. Also if plunger is not smooth, this will also prevent it from moving and tightening. No need for manual-tensioner as working OEM one does good job. If yours isn't working, just replace with factory unit. Lubricate it with synthetic lithium grease before installing.

Also check chain-guide that tensioner pushes on. If it has excessive wear or is broken, cam-chain tension can't be maintained.
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