Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Morala on December 09, 2024, 11:25:48 PM

Title: exhaust
Post by: Morala on December 09, 2024, 11:25:48 PM
Hi everyone, can somebody explain the reason for the rubber connector  that joins the two silencers on my 1974 550, thanks for any advice you can give me.
Title: Re: exhaust
Post by: ozzybud on December 09, 2024, 11:55:06 PM
Likely similar reasons dual exhaust cars have "H'" pipes

here is an AI answer for h pipes.   likely gives it a better sound.

Cars have H-pipes in their exhaust systems to help equalize exhaust pressure between the two sides of the engine by creating a crossover point, which can lead to improved engine performance, particularly by enhancing low-end torque and smoother power delivery, especially on vehicles with dual exhaust systems; essentially, the H-pipe allows exhaust pulses from one side of the engine to interact with the other, promoting better gas flow.
Title: Re: exhaust
Post by: Bryanj on December 10, 2024, 12:02:12 AM
Somebody in Hondas R&D in the late 60's worked out you got a slight increase in power with it fitted
Title: Re: exhaust
Post by: SteveD CB500K0 on December 10, 2024, 06:51:59 AM
Bryan, have you got “convert characters to emojis” set in your PC?


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Title: Re: exhaust
Post by: deltarider on December 10, 2024, 08:23:32 AM
Somebody in Hondas R&D in the late 60's worked out you got a slight increase in power with it fitted
Yes, when these 'balance tubes' are more towards the end, there's a slight increase in high rpm's, the more towards the head, you gain somewhat in the lower range. That's the idea. Personally I don't think ours make much difference. After all... Honda dropped them when they launched the K3's.
Title: Re: exhaust
Post by: Bryanj on December 10, 2024, 10:57:55 AM
Absolutely no idea what you are talking about Steve
Title: Re: exhaust
Post by: McCabe-Thiele (Ted) on December 10, 2024, 11:05:54 AM
Nor me.
Title: Re: exhaust
Post by: SteveD CB500K0 on December 10, 2024, 11:54:03 AM
Somebody in Hondas R&D in the late 60's worked out you got a slight increase in power with it fitted
(https://uploads.tapatalk-cdn.com/20241210/c27c3f3dae22fb4618131919f0f380d1.jpg)

Clearly a phone thing...


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Title: Re: exhaust
Post by: Bryanj on December 10, 2024, 12:34:32 PM
Well i was on my dumfone when i wrote it, the pc is still running 98 and the laptop 7!
Title: Re: exhaust
Post by: Morala on December 10, 2024, 06:55:15 PM
thanks for all the advice, was wondering if the connectors can be removed without causing any problems as it is a real bore trying to line the connectors up so would it be possible to seal the openings on the exhausts or will it cause the bike to run badly cheers.
Title: Re: exhaust
Post by: Bryanj on December 10, 2024, 09:16:31 PM
Probably not, only the nit pickers will be upset
Title: Re: exhaust
Post by: Murf on December 11, 2024, 11:59:21 AM
As Bryan says leave them fitted or you will be harassed by the classic bike police every time you take it out 😄😄.  Well the lack of them will definitely be pointed out to you. 

I haven’t got a 5mm diameter red dot 🔴 painted on the front brake caliper of my CBX and I am always being told about  the error of my ways.  Now I have become stubborn and won’t put it on 😂
Title: Re: exhaust
Post by: Sesman on December 11, 2024, 12:56:14 PM
Hey, Murf. Put two red dots on. That should mess with their heads. Then tell them it’s an American model!
Title: Re: exhaust
Post by: Martin6 on December 11, 2024, 01:27:19 PM
Or HRC.
Title: Re: exhaust
Post by: Sesman on December 11, 2024, 01:38:11 PM
😁😁😁
Title: Re: exhaust
Post by: andy120t on December 11, 2024, 03:55:14 PM
thread on the CBX International site (I can't work out how to copy the link) says it's not a red dot, it's a red splash...then the red is masked off (with a dot sticker?) and black painted over leaving a red dot. So next time it's mentioned, ask if you can scratch their caliper paint to see if they have the correct splash!
Title: Re: exhaust
Post by: Morala on December 11, 2024, 08:11:44 PM
thanks for all the info, think i will leave them on, its not as if i will be taking the pipes off on a regular basis cheers.
Title: Re: exhaust
Post by: deltarider on December 12, 2024, 09:15:31 AM
Is this price, € 400,- € 1.350,- for a complete set* misleading? Probably Busso meant it as a first downpayment.
https://www.bussostore.com/en/products/marmitte-honda-replica-originali-cb500k0k1k2-four
Where I live, it's law they have to sell it to you for the price anounced.
*Busso forgot to mention the set will also fit the CB550-CB550K2 models.
Title: Re: exhaust
Post by: Nurse Julie on December 12, 2024, 09:21:43 AM
Is this price, € 400,- € 1.350,- for a complete set* misleading? Probably Busso meant it as a first downpayment.
https://www.bussostore.com/en/products/marmitte-honda-replica-originali-cb500k0k1k2-four
Where I live, it's law they have to sell it to you for the price anounced.
*Busso forgot to mention the set will also fit the CB550-CB550K2 models.
It's 50% of the total price Delta, so €400 now, €400 when ready for dispatch + shipping.
Title: Re: exhaust
Post by: SteveD CB500K0 on December 12, 2024, 11:23:51 AM

Where I live, it's law they have to sell it to you for the price anounced.


Not so here. However, most large companies will honour an advertised price unless it is clearly ridiculous and a genuine error.

Contract law in the UK is actually the other way around.
A product is advertised for a price.
You “offer” to buy it at the advertised price but the seller doesn’t have to accept your contract.
Makes for great questions in accountancy exams (I’ve done a few)


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Title: Re: exhaust
Post by: Bryanj on December 12, 2024, 12:19:50 PM
Look up Busso on the us site, people are still waiting over 2 years after paying
Title: Re: exhaust
Post by: McCabe-Thiele (Ted) on December 12, 2024, 12:34:28 PM
I thought for some reason they had gone into liquidation so were flogging  off stock for creditors.
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