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Teds new project a CB500 K1 mostly version 0.5 circa 1972.
SteveD CB500K0:
I put Dunstall “silencers†on my CB175 in 1975(ish).
My mum always said she could hear me from the next village.
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K2-K6:
It's the long relatively small bore primary pipes that give the engine It's low to mid rpm torque. Mostly removed on 4:1 system, but doesn't need to be.
A friend drag raced a 750 years ago for which we tried sets of pipes, easily the fastest through initial phase and rpm range was a 4:1 with long thin primary pipes into short, stubby big bore less restricted "silencer" this for road orientated motor tune and not a really high revving race motor.
It takes alot of combustion volume/rpm to really make use of big bore short primary "headers" and mostly way outside capacity on bikes of this era.
Sesman:
--- Quote from: McCabe-Thiele (Ted) on December 21, 2022, 09:49:55 AM ---I guess the market is to small for Dekelvic to make a SS four tail pipe system.
--- End quote ---
Yes, Ted. Too small market for meaningful competition.
Sesman:
--- Quote from: SteveD CB500K0 on December 21, 2022, 09:52:25 AM ---I put Dunstall “silencers†on my CB175 in 1975(ish).
My mum always said she could hear me from the next village.
Yes, I know all about that. I used some cheap reverse cone megaphones from that outfit in Rochdale- Unity Ill equipped or something like that. The noise was horrific. My mum asked me to coast or push the bike the last hundred yards after 10pm. I was able to reach back and place my boots over the ends so rarely bothered.
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--- End quote ---
Bryanj:
I had a Marving on my 500 in the mid 70's and my mate could hear it start from 7 miles away, even then i had to pack it with fibreglass to get a test pass
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