Update:

Tsubaki got taken to task a bit -- they advertise bragging rights to a quarter inch pitch (6.35mm) silent chain on their home web page.  Tsubaki America finally admitted the quarter inch pitch chain is only manufactured under license for "certain Pacific Rim OEM suppliers" and cannot contractually be sold back to America at all.

Rest of the story comes from Morse.  I got back their report on the chain and gear that I got from Lancer.  It is a Morse Type 82 silent chain that was manufactured by their Japanese subsidiary (guess who) and it is their best and only quarter inch chain of the Type 82 (motorcycle style) silent chain family.  They do not offer their hard pin in that style -- the chain is too small.  They do not offer a HY-VO tension split pin design that small -- smallest HY-VO size is the 3/8" pitch size.  

There is no better Type 82 chain pins or styles available.  We got all that there is in a Type 82 chain.

Comments on the sample chain and sprocket is that it was NOT worn out -- it was approximately a bit past halfway to the engineering wear limit.   This lines up with the service wear limit in the Suzuki Shop manual.


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HOWEVER,

There are automotive style silent chains in quarter inch pitch that will run on our gear forms.  The chains are made of links that are 1.25mm taller (same length -- but they swing a larger pin that sticks out a little longer on the side of things).

As such these chains would require changes to the left side straight chain guide to back the guide away from the chain 1mm and some changes to the top of the tension guide side at the top end edge to keep it from being abraded out of existence by the taller chain as it comes off the cam gear.  

I don't know what the longer protruding pin heads would hit or do to the engine as it ran its pathway.

Would this thicker chain last any longer?  Who knows?  
It was built for a dual overhead cam car engine and would require modifications to our engines to fit at all.

That's it, the last silent chain vendor has reported.  

Any opinions on the taller automotive chain and what it would hit if someone tried to install one in a Savage?

Oldfeller

verslagen1 wrote on 11/08/11 at 13:34:22:


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