Do someone ever replace his triplex chain by a duplex chain from the Chainman?

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Kvinnhering said:
Stretch less than triple chain with my use.
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Why is that, you think? The load per chain row is higher with a two-row chain (by 51% actually) than a thress-row chain. The only benefit I can see is less load on the mainshaft.

-Knut
 
Apparently there are a lot of poor quality triplex chains around. The original ones are no longer available and Renold supply chains with split rollers rather than solid ones, as they should be. Andover Norton now supplies the triplex chain (060366) made by CZ accoring to information on the NOC message board. They are receiving good marks. Iwis chains are also receiving good marks and a triplex chain for the Norton Commando is offered by Classic Bike Spares (AU) and others.

-Knut
 
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Reggie said: ↑
I've fitted one this year. I've done about 4,000 miles / 6400km without any problems.
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Let's talk again when you've had 60 000 miles on that chain.

-Knut
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Knut, I'll p.m. you in 2030 or thereabouts.:)
 
mdt-son said:
Apparently there are a lot of poor quality triplex chains around. The original ones are no longer available and Renold supply chains with split rollers rather than solid ones, as they should be. Andover Norton now supplies the triplex chain (060366) made by CZ accoring to information on the NOC message board. They are receiving good marks. Iwis chains are also receiving good marks and a triplex chain for the Norton Commando is offered by Classic Bike Spares (AU) and others.

-Knut
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If you bought a Renold chain with split rollers, it would have been the much cheaper industrial low speed product & not the product knows as Blue Box" as was & is still made for classic bikes. If someone sold it to you claiming it was for a motorcycle, you were stung big time.
Renold Blue Box & Synergy chains have solid extruded rollers.
 
ClassicChainsGuru said:
If you bought a Renold chain with split rollers, it would have been the much cheaper industrial low speed product & not the product knows as Blue Box" as was & is still made for classic bikes. If someone sold it to you claiming it was for a motorcycle, you were stung big time.
Renold Blue Box & Synergy chains have solid extruded rollers.
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True but Renold Blue Box & Synergy chains are a lot more expensive than for example Regina Classic 136/SR chain of equal good quality and this Regina has the same narrow width (3/4") as the old Renold motorcycle chain (unlike most modern 5/8 x 3/8" wider chains) so no rubbing against gearbox or inner primary chaincase ;)

Just realized this thread is actually about TRIPLEX chain and my comment does only apply to the rear chain :oops:
 
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I think you'll find that the cost of Blue Box chain is comparable to Regina Classic if you get from a good source. I personally buy it in 25ft lengths & create several lengths from it. I won't reveal what it cost me but its considerably less than even the nastiest chain around. Synergy at present, isn't approved for motorcycle use as it was launched AFTER Renold stopped marketing their chain for motorcycles.

Blue Box however, is the current name for the chain they've been making for years & what was fitted by the motorcycle OEMs. Despite the fact that Renold don't currently pay for ISO10190 certification, the chain itself is way beyond the requirements for the standard. The chain itself is essentially the same so is approved for use on a historical OEM replacement basis.

I do however run Synergy 5/8"x3/8" on my Triton out of my own choice & have yet to adjust it. I admit it costs twice that of Blue Box but under Renold tests, it last 6 times longer so in the long run, it's the best standard chain around.
 
Brooking 850 re machining off redundant teeth.
I,ll be doing that, "machining" them off with a 4" disc grinder in a vice.
actual weights so far:
AN CZ 92t Triplex chain is 962g,
Chainman Iwis 92t Duplex chain is 695g.
AN Mk3 26t Triplex engine sprocket is 571g,
Same sprocket with outer row teeth ground off to leave 1.5mm ridge is 550g.

Total weight reduction on these bits is 288g /10.16oz or 18.8%
Clutch chainwheel still to do, but will probably be around 55g for a total weight reduction of 343g / 12.10oz or 22.4% on Mk 3 bits.
 
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Reggie said:
I've fitted one this year. I've done about 4,000 miles / 6400km without any problems.
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I've just got my new duplex primary chain from the chainman( now Jason ). I ordered 'heavy duty, it fits the sprockets OK but because of the extra thickness of the side plates it runs extremely close to the back of the case. I already have one thick and one thin shim. The side plates are 0.3mm thicker. Any ideas before I send it back for a 'standard' size? Maybe that's the correct one to use?
Cheers
 
Gilesy said:
I've just got my new duplex primary chain from the chainman( now Jason ). I ordered 'heavy duty, it fits the sprockets OK but because of the extra thickness of the side plates it runs extremely close to the back of the case. I already have one thick and one thin shim. The side plates are 0.3mm thicker. Any ideas before I send it back for a 'standard' size? Maybe that's the correct one to use?
Cheers
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How close exactly?
 
It is best on the 2 inner rows, never measured the clearance on mine as it did not flag as an issue.
 
As far as I am aware all duplex is heavy duty, I asked for Merc timing chain and that's was was supplied and also as simplex for cam chain.
 
Further back in this thread KiwiNeall has his weighing 695g, the one I have is 825g so his must be standard weight and mine heavy duty. In any event I have sent it back to exchange for the lighter one.
 
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