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Old May 3rd, 2020, 12:38 PM   #89
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

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
Quote:
Originally Posted by ducatiman View Post
Interesting and a bit surprising to me...I'm working on a Honda 750 Shadow V twin right now....2 separate cam chains....using a coil spring arrangement to determine tension (not traditional tensioners as used on so many inline 2's and 4's)
Internal, no maintenance nor settings, meant for the life of the engine apparently, though admittedly this Honda V is no where near a rev monster.
I really like tensioner design on my Honda V4. It's curved steel spring with plastic slipper surface that presses on cam-chain over 6" section. Large contact-area reduces load and creates high durability.

Another concern is harmonics in sections of chain around contact point. With small single-contact point to adjust tension, you end up with harmonics on either side based upon engine-RPM.

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