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The manual tensioner appears to be fully to the left with no more adjustment and there is still movement in the chain. Maybe this engine has over 100,000 on it?Thank you,Tom
It's rare that the o.e. "fixed" tensioner will actually tension the chain, even at low miles.
Does that mean the chain must be replaced, or is there an alternative chain tensioner that can take up the slack?
btw you can buy a Mercedes Benz chain that is identical to the Guzzi one, except it has a split link and you have to remove some linksto get it to the correct size. I thought twice about the split link but I thought, if it works for MB it'll be fine in the Guzzi.Sorry I can't find the part number, but I got the MB info from this forum, so hopefully, someone can help out with that.
You just have to pay attention to the casting boss for the front cover bolt.As per the picture, the top rests against the inner part of the engine case, the spring tension bows the blade to produce control of the chain.The spring run over that boss (deflecting it) could produce extra tension, how much is to much is anyone's guess but there seems to be 1000's in service with no issue.#When the Moto Guzzi community accepts, biff your final drive on the bench to seat the outer bearing when shimming, the tweaked spring on the Valtec is hardly worth mentioning.
I had a totally stock Calvin 2009 that did around 15k miles before its tensioner shattered into little pieces, chain slipped off the oil pump and hey presto one seized motor.nice.
That's concerning, your experience sounds horrible, but it's the first time I've ever read of that happening, especially at such low mileage. Sounds to me like it might have been assembled on Friday afternoon in Mandello, and destined for failure from the get go When I did the timing chain on my CX100, it had 24k miles and the adjuster was doing nothing, not even close to touching the chain, let alone keep it tensioned. The chain was loose flopping around quite a bit and had worn part of 1 lug inside the case, but there was no indication it was loose enough to come off the sprocket. Fwiw, with the new chain and tensioner, the clunking and clattering sound of the engine seemed to quiet a bit, run tighter with a little bit of a whinery sound, similar to what I imagined gears would sound like. I did so much other work on the bike, it was hard to attribute the marked improvement in the running to solely the new chain/tensioner; it may be wishful thinking, but after seeing how loose the old one was, it made sense to me, that timing, valves, breathing etc would have to improve with a steadier/tighter baseline to operate from I've never been inside the timing chest of the newer bikes, but I was under the impression that the tensioner design had improved a lot, I've never them a second thought in the new bikes, now I'm not so sure Kelly
I think you meant a “whiney” sound...Not “whinery” (sic), there may have been a “winery” involved somewhere in the story though..