KZR's Bikes of the Month for 2024

Moriwaki 4-1 exhaust

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07 Oct 2024 01:50 #904917 by Sixten
Moriwaki 4-1 exhaust was created by Sixten
Hi,
Found a Moriwaki exhaust on Croooober for my 500 racebike. 
When I look into the collector it looks like 4 conical restrictors.
This is not a racing exhaust so maybe it’s for damping noise? Or can it be something to increase performance?
 

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07 Oct 2024 02:07 #904918 by Wookie58

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07 Oct 2024 14:13 #904932 by Sixten
Replied by Sixten on topic Moriwaki 4-1 exhaust
I guess it needs to be perfectly tuned to the engine then. 
I should run it on dyno and then remove it to compare 🙂

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  • Kelly E
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  • Never Give Up. Never Surrender
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07 Oct 2024 16:11 #904934 by Kelly E
Replied by Kelly E on topic Moriwaki 4-1 exhaust
It seems like a weird place to put an exhaust restriction. Most of the systems I've seen have the restriction at the front of the baffle in the muffler.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

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08 Oct 2024 00:08 #904947 by Wookie58
Replied by Wookie58 on topic Moriwaki 4-1 exhaust

It seems like a weird place to put an exhaust restriction. Most of the systems I've seen have the restriction at the front of the baffle in the muffler.
Yamaha also put the "EXUP" valve in the collector ?

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20 Oct 2024 12:47 - 20 Oct 2024 12:48 #905266 by Sixten
Replied by Sixten on topic Moriwaki 4-1 exhaust
The monaca muffler looks cool but i can’t recommend it.
I had to cut it open to repack it.
It had to be repaired anyway and now it’s modified so i can just pull the aluminum part off from the perforated pipe and change/fill the wool.
 
Last edit: 20 Oct 2024 12:48 by Sixten.

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