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660 chain tensioner

This is a discussion on 660 chain tensioner within the Engine forums, part of the Technical category; so i'm rebuilding my top end due to 3 valves being bent, the timing chain skipped and bent some valves, i'm thinking that it went ...


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Old 01-31-2012, 10:29 AM
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660 chain tensioner

so i'm rebuilding my top end due to 3 valves being bent, the timing chain skipped and bent some valves, i'm thinking that it went out of time from the chain skipping, so i beleive that my tensioner is bad, do i just buy a new one from yamaha or is thier a better one to buy? i've seen one on ebay that is just a bolt that keeps tension so no spring, is that a good one to buy? any ideas are helpfull
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Old 01-31-2012, 12:50 PM
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I think a lot of people are using 700 Raptor Tensioners some say there better... Search Raptor Tensioners and read that article Good Read

Last edited by camorhino88; 01-31-2012 at 12:56 PM.
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Old 02-01-2012, 06:12 AM
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I went with the Rhino 700 tensioner om my 686 build. Its a much better design and no mods are needed. The 700 is a ratchet design, the 660 is a screw design that does backoff.
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