STAINLESS EXHAUST SILENCERS

CLEMTOG said:
MALCOLM COX
we all love him greatly, but he will always be the short arsed shitter from Solihull.
We all have something wrong with us, yes every single one of us still alive today, Malcolm, the weirdo, DOES NOT DRINK TEA. That is a very strange one if you ask me.
CLEM
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Hahaha.....I probably do not need to comment....but I remember calling you in hospital last year....and it was YOU who had to terminate the
calls urgently for "Toilet issues"...hahaha...when in glass houses.....haha
 
I can confirm the Keihan collector will crack. After welding it back up, it will crack again. Next system I get will be from Malcolm Cox.

Now doesn't Red make exhaust systems for the 180's?

As for the poor design of the collector preventing the bike from making any power at high revs, well my 3CL on a dyno with the Keihan made 72HP at 8200 RPM at the back wheel.
 
1200ts said:
I can confirm the Keihan collector will crack. After welding it back up, it will crack again. Next system I get will be from Malcolm Cox.

Now doesn't Red make exhaust systems for the 180's?

As for the poor design of the collector preventing the bike from making any power at high revs, well my 3CL on a dyno with the Keihan made 72HP at 8200 RPM at the back wheel.
Click to expand...
mine did not go beyond 86 HP with the Keihan Collector. After just changing the collector Box, it went up to 101 without loss correction (roughly 110HP engine power). If that's not a clear sign of the design beeing shit, I don't know what is... ;)
 
basically, the Keihan collector has a reduction in diameter and is - overall - to small in size, badly designed internally (the rear ends protuded into the collector segment), which all together produced a massiv restriction in flow. And that is something you absolutely have to avoid on exhausts according to the 3 exhaust specialists I spoke to.

I am not to good at making drawings but hope this one helps to understand the difference:

collector Keihan - Stueber.jpg

And here is how it turned out in reality:

Jota-Sammler01.JPG

Looks a bit like the mufflers would be in different positions, but that is just due to them not beeing properly installed (fixed it after the foto was taken). The upper part is taken off the Keihan system as it was absolutely OK and better shaped than the original one even (until the first welding from top). The rest was cut off and just the conection tubes from the end of the collector were used to conect to the mufflers.

HTH

Disclaimer: The Design isn't ideal in terms of oil exchanges, as it sits partly under the oil drain hole. Something I can live with... Also, the standard center stand rest (the rubber where the center stand sits against when flipped upwards) does not work anymore, which I still need to find a solution for (currently, the center stand hits the exhaust somewhere; need to install a rubber buffer somewhere but haven't found a solution yet. Does not harm anything (yet) and also does not affect ground clearance (though I ride the tires to the edges) and as I am using the sidestand in 90% of all cases, I don't mind to much.
 
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Laverdalothar said:
basically, the Keihan collector has a reduction in diameter and is - overall - to small in size, badly designed internally (the rear ends protuded into the collector segment), which all together produced a massiv restriction in flow. And that is something you absolutely have to avoid on exhausts according to the 3 exhaust specialists I spoke to.

I am not to good at making drawings but hope this one helps to understand the difference:

View attachment 96651

And here is how it turned out in reality:

View attachment 96652



Also, the standard center stand rest (the rubber where the center stand sits against when flipped upwards) does not work anymore, which I still need to find a solution for (currently, the center stand hits the exhaust somewhere; need to install a rubber buffer somewhere but haven't found a solution yet.
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Look for a rubber door stop like this, Lothar, and that may solve your problem.
 
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