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knuckle head
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knuckle head
Joined: Oct 2012
Posts: 6,433 Likes: 298 |
Looking for a A65 or A10 siamese exhaust or 2 into 1 aftermarket pipe is any condition so long as the pipes before the junction are not dented..Thanks
61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons "I don't know what the world may need But a V8 engine is a good start for me Think I'll drive to find a place, to be surly" “
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Britbike forum member
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Britbike forum member
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I think classic British spares carries them
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I may have a set or 2....i'll look this week Bill in OHIO
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Joined: Oct 2012
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knuckle head
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knuckle head
Joined: Oct 2012
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I may have a set or 2....i'll look this week Bill in OHIO Thanks, do let me know, Tony
61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons "I don't know what the world may need But a V8 engine is a good start for me Think I'll drive to find a place, to be surly" “
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Joined: Dec 2020
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Novice poster
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Went to the Warehouse found the main pipe NOS...but the short pipe looks too long..send me your email or ph # I'll send 2 pics 419-466-7444 regards Bill
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Joined: Oct 2012
Posts: 6,433 Likes: 298
knuckle head
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OP
knuckle head
Joined: Oct 2012
Posts: 6,433 Likes: 298 |
61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons "I don't know what the world may need But a V8 engine is a good start for me Think I'll drive to find a place, to be surly" “
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Joined: Aug 2001
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Britbike forum member
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Britbike forum member
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Bill, If you have another set I would be interested Thanks, Richard
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Joined: Jan 2002
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Britbike forum member
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Britbike forum member
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what is the advantage, if any, of siamesed pipes in this application?
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Joined: Oct 2012
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knuckle head
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knuckle head
Joined: Oct 2012
Posts: 6,433 Likes: 298 |
Less parts....Some claim more power, some say less, some say no difference.....
61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons "I don't know what the world may need But a V8 engine is a good start for me Think I'll drive to find a place, to be surly" “
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Joined: Aug 2006
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Britbike forum member
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Britbike forum member
Joined: Aug 2006
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Don't know what he's building but a good tuned set of 2 n 1 headers can do wonderful for the bottom end pull and mid range. Great fun for the eighth mile dirt, worked well for me on A65 anyway. but retired the pipes few years ago and just kept for memories. ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/WtRxzwQj/IMG-1506.jpg)
Last edited by breeze1954; 12/20/20 11:10 pm.
Nothing ticks you off more than that moment during an argument when you realize you're wrong!
Tim Kirby
Small print Disclaimer: I am not responsible for spelling, grammar or political correctness. Actually I'm not very responsible at all!
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1 member likes this:
Allan G |
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Joined: Jan 2002
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Britbike forum member
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Britbike forum member
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Don't know what he's building but a good tuned set of 2 n 1 headers can do wonderful for the bottom end pull and mid range. Great fun for the eighth mile dirt, worked well for me on A65 anyway. but retired the pipes few years ago and just kept for memories. ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/WtRxzwQj/IMG-1506.jpg) nice collection. how do u tune them?
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Joined: Aug 2006
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Britbike forum member
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Britbike forum member
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Didn’t mean to alter the thread; but the headers are made to exact equal dimensions. Then you pick your silencer and just jet and tune the bike to match what you want. What you have coming in and what you have going out have to be in proportion with each other. That’s what I was taught anyway and it always seemed to work well for me. Though I do tend to run my old bikes a little rich now these days.
Nothing ticks you off more than that moment during an argument when you realize you're wrong!
Tim Kirby
Small print Disclaimer: I am not responsible for spelling, grammar or political correctness. Actually I'm not very responsible at all!
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hacksaw |
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Joined: Dec 2013
Posts: 6,257 Likes: 246
DOPE
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DOPE
Joined: Dec 2013
Posts: 6,257 Likes: 246 |
i run 1-5/8 inch open pipes on a T120, and tune them with extensions the bare pipes are 32 inches and i can clamp on tubes that make them 34, 36, 38, and 40 ![[Linked Image from i.imgur.com]](https://i.imgur.com/m19piEdl.jpg) on this machine th ebest length is 34, which is way shorter than even ordinary TT pipes wouldn't know what to do with a muffler though. that introduces multiple complexities, like a megaphone.
i'm old enough to remember when patriotism meant not trying to overthrow the government.
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Joined: Oct 2012
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knuckle head
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OP
knuckle head
Joined: Oct 2012
Posts: 6,433 Likes: 298 |
Eddie Dow the known BSA tuner liked the unequal length siamese pipes on the A10....That was then and more is known about exhaust tuning... Like Kevin I have found a 34 inch pipe to make the best speed, but 1.5 diameter .....Our bikes are very close in performance but have different carbs, cams and so on but like the same pipe length Current thinking is the intake, cams and exhaust must all work together, each requiring adjustments..... The A10 I am building is just a fun back road bike, no need fror maxmum power
61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons "I don't know what the world may need But a V8 engine is a good start for me Think I'll drive to find a place, to be surly" “
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Joined: Dec 2013
Posts: 6,257 Likes: 246
DOPE
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DOPE
Joined: Dec 2013
Posts: 6,257 Likes: 246 |
the unequal pipe thing may have been to broaden the power band by peaking the cylinders at slightly different rpm like tuning ignition, exhaust, and intake 500 rpm apart. they don't give you the highest peak but it spreads out more dunno how vibration would be affected leo goff told me to use 1 5/8-inch pipes. i have some standard TT pipes to experiment with, 1 3/4-inch and whatever their length should be. i think the length was pretty much stadardized by years of flattrackers.
Last edited by kevin; 12/23/20 12:10 am.
i'm old enough to remember when patriotism meant not trying to overthrow the government.
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Allan G |
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knuckle head
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knuckle head
Joined: Oct 2012
Posts: 6,433 Likes: 298 |
[quote=kevin]the unequal pipe thing may have been to broaden the power band by peaking the cylinders at slightly different rpm
I like that line of thinking......
61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons "I don't know what the world may need But a V8 engine is a good start for me Think I'll drive to find a place, to be surly" “
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