The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: raindodger on 17.12. 2024 19:15
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Can any of you fine gentlemen recommend a supplier of a siamese exhaust system for my A10 that will actually fit?
I'm fitting a sidecar, so access will be limited.
Regards.
Tim.
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Mine has one but its ancient so I don't know who made it. What I will say is that with 2:1 pipes they not only need to fit but stay fitted. The short drive side section has a tendency to blow out on some designs so take a close look at what holds that in place.
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After a lot of Google research *whistle*, I settled on a Armours siamese system to fit a '54 RR new build. From what I can gather ,they use thicker wall pipe and are triple plated. Price was OK in comparison to what is available in Australia , freight was a killer though.
Anyway I bit the bullet and ordered them, arrived about 10 days later packed well and looked fantastic. The RR is still on the bench so I fitted them to my '60 Super Rocket for a trial run. Fitted straight on, no fettling required, secured the header pipes in the head with some silicone type sealant and fired it up. A little louder than my twin stock pipes but a deeper sound.
Since then have racked up about 400 klm of spirited riding (70 mph cruising) following a few "moderns"with no issues of headers moving in the head, chrome is just starting to yellow at the pipe junction.
So very happy with them. Hope that helps.
Don
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+1 for Armours. I have them too.
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I have an Armours exhaust on my Matchless, very solid and well made. Have you seen where they are? Down an alley in Bournemouth behind a Kebab shop and a dance wear shop *smile* .
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Yes, always Armours. The only issue I've had with the Siamese system is the exhuast pipe on the LHS (kerbisde in the UK) doesn't go into the head at quite the right angle so it is difficult to get the cooling ring to fit flush against the head. Others seem to have had the same experience.
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On my system (of unknown origin) its the drive side that doesn't sit right. Rather a lot of filing was need to the ring to get it to sit where it should.
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Got mine some 15plus yrs ago from Cake st classics still looking and fitting well
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Yep, me too. +1 Armours Siamese SS.
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Thank you Gents for your comments.
It looks like Armours get the vote.
A happy new year to you all.
Tim.
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Thank you Gents for your comments.
It looks like Armours get the vote.
A happy new year to you all.
Tim.
Happy New Year!
Any news on Armours Exhaust?
I need to get exhaust pipes and silencers
But will be closer to the time of completion
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And a happy new year to you all.
I'm in the middle of installing a sidecar and electric start. Having an unheated shed
it's on the back burner at the moment.
I'll be ordering the exhaust in the spring and I'll let you know how it goes.
Best to all.
Tim.
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Apologies for off topic, but you refer to un-heated shed - a problem i have too. Do you have plans to reduce condensation or stop its effects?
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Hmmmm this subject intersects two of my concerns. My shop has a gas heater of 50,000 btu so that takes care of my 90 sq meter shop and I am about to put a sidecar carrier on either my A7, which will need a Siamese silencer (left hand for here in N America) or for my RE Bullet?, that will have to change sides as well. Of course there will be sprockets and chains that need changing
Frank
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I wish I could work in a cold shed!
Instead here in Florida, my garage gets super hot, after 3 minutes it feels like I just jumped out of the shower wearing clothes *smile* and one day will add A/C in garage.
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I used to wrap my bike in old towels and store it in a sealed plastic bag.
Then suck out the air with a vacuum cleaner.
Now that have fitted a sidecar, that is impossible.
So the towels will have to do.
Tim.
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you can always insulate the shed *eek*, when I built mine (colourbond steel) I used Aircell across the roof and down the sides, never had a condensation problem, not toooooooo cold in winter (down to zero - 2 outside), still gets a bit warm in summer (up to 35-38 deg outside), but its tolerable...
probably best to build with a higher roof than you really need if you can, for summer, I learnt that later with a friend's shed...
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For a really snug winter workshop I bought a redundant refrigerated lorry body. 5" of insulation allround. Just have to remember to let some fresh air in occasionally. 😁