manual cam chain tensioner

hvlmike

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I need a manual cam chain tensioner for my 2017 RC390 and I can't seem to find one anywhere. Anyone know where I can order one?
 

Superpacman13

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Woops, guess I should list those instead of just having them lay around in my inventory and wondering why they don't sell. Duh.
 

kostean

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Superpacman13, any advice/guides on how to tension these things right?

Took mine out of the drawer now once the engine is at the stand to see how it fits in. Need to admit the "finger tight" approach has about 2 turns worth of room to interpret what it could be, so any other clues to follow how tight it should be at cold?
 

ReidMcT

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In my experience you can run the chain very loose. But too loose starts to affect the timing in a bad way.
 

kostean

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For the beginning, I used the method of simply hand tightening the tensioner while the engine was at the bench and set it at TDC to be having the chain modestly tight.

Then, once started up the engine I did once more try the tensioner nut with hand with the engine running, and there was quite a number of additional turns I could add with a finger to the tensioner before started to feel it getting hard to turn. I would consider the level of tension it feels while the engine running is the important one so left it 1/2 turns back from "where it felt hard to turn with 2 fingers".
 
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