JH600 stalling

[998S]

Camshaft chains do get longer over a long period of running. That's why there is an automatic chain tensioner which keeps the slack out of the non-pulled half of the chain. As long as the chain does not become too long - i.e. the tensioner can not compensate anymore slack - the chain and camshaft timing are perfect. Please note, the camshaft is controlled by the PULLING part of the chain. And indeed, in our beloved Jialing JH600 the camshaft rotates counter clockwise, as does the crank-shaft, viewed from the left side of the engine. And the non-pulled side with the slack is (of course!) at the correct side, i.e. the right side viewed from left side of engine.

Some info on the timing chain elongation here.As far as I understood the issue - I've been following this thread from the very beginning - some stalling came only after a several thousand k's. Timing chain elongation could be a reason and it may be a worth to try a chain replacement on one of the bikes. Just my 2 Fen.

Hi Bart & Andy, perfect description on the pulling side story, and correct.
Exact the same came up during the meeting during our discussion with the JL technicians.

Where I however disagree, is that cam-chains get longer, and that is confirmed by the link of Chinabiker.
The tensioner is basically to keep the chain tight, to prevent it from skipping a teeth if too loose.
And the adjustability in the tensioner (mostly by spring pressure) is more to compensate for manufacturing tolerances then for wear-compensation.
Of course it is a mechanical system, and subject to wear, but I still put this very low on my list of possible causes.

I do not want to rule out that disconnecting the sensor is the solution, but I still miss the technical reasoning behind it.
You furhter might consider that if so, you might have a far larger problem inside your engine; the longer cam-chain will NOT get shorter by dis-connecting the sensor.

You failed to convince me so far....