5 replies to this topic

[mini_brave]

Rebuilding my SPI and fitting a Dulplex timing chain, when fitting the tensioner it seems very tight even on the minimum setting.
Should i leave it off ?

[mini93]

the chain will stretch upon 1st use as such the tightness wont remain to that degree for long...saying that chain should always be tense on the leading side, the tensioner is on the non leading side...can be disgarded if your not happy with it but if you can fit it you may aswell as it will stretch with use anyway
as another thought can you alter the mountings anyway? either by widening the hole or some other way?

[minimender]

Duplex chains were never fitted with a tensioner by the factory so I would leave it off. I have fitted them and found that they are not quite wide enough so putting uneven pressure on the chain.
I would fit a new chain and leave the tensioner off.

[Guess-Works.com]

Likewise, don't see the point of the tensioner on the duplex chain, they don't stretch 1/2 as much as the simplex.. however have not used a duplex in a number of years so the quality of the chains may have suffered.

[Ivor Badger]

Duplex chains as pointed out were never fitted with a tensioner. The later spring tensioner replace the non effective rubber ring tensioners on the single chain.

[Sprocket]

Fit the tensioner, a chain will always rattle no mater how new or worn it is The tension will be even as its putting pressure on the middle links and bearings of the chain once it has bedded in. to be honest the duplex set up is just extra weight nothing more

Edited by Sprocket, 29 December 2009 - 09:03 PM.