d5aul
L plate rider.
Posts: 38
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Post by d5aul on Jul 16, 2018 15:22:48 GMT 1
Hi, received as spares with my 350 LC YPVS project, I received the pipes in the below picture, does anyone recognise them? I was told by the previous owner that they are Allspeeds? the cans look like they could be but not sure on the rest, particularly the down pipes, I also note how far forward they would mount.  |
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Post by Norbo on Jul 16, 2018 15:32:54 GMT 1
I think your right they started of as speeds . the down pipes have been moded thats not as they come to fit a bike most likely or rusted threw and looks like they lost the end cap holding in the baffle and spring as thats been moded as well .
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Post by reedpete on Jul 16, 2018 15:34:07 GMT 1
Looks tidy but misguided DIY, maybe an allspeed originally but not convinced ! and no defo OE pipe would have a header like that.
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Post by Oliver31 on Jul 16, 2018 15:58:00 GMT 1
That's a hell of a bend to pass through
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Post by lrcarl on Jul 16, 2018 17:31:15 GMT 1
Think there all original allspeed
Friend had some back in the day with same down pipes
Carl
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d5aul
L plate rider.
Posts: 38
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Post by d5aul on Jul 16, 2018 18:03:58 GMT 1
I was thinking they may have been very early allspeeds, almost development? It was probably soon realised that smooth curves were better for gas flow? Hence why you never see them made that way any more!
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Post by reedpete on Jul 16, 2018 18:09:54 GMT 1
They look like they have been/modified/made for a TZ, it’s the only engine that would use something that short. An aggressive bend is then nescessary to get the belly in the right place but that’s just not the way to make something that would flow or resonate nicely.
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Post by jon on Jul 16, 2018 18:15:00 GMT 1
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Post by lrcarl on Jul 16, 2018 18:21:23 GMT 1
Was at stink wheels a couple of years ago and asked Tony if he remembered these pipes
Said a customer had asked for a set to be made and showed me peter Gibson’s original drawings
Carl
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Post by jon on Jul 16, 2018 18:33:02 GMT 1
I quite like them in a strange retro sort of way.
Love to see them fitted.
Jon
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Post by reedpete on Jul 16, 2018 18:37:43 GMT 1
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Post by oldelsieboy on Jul 16, 2018 18:49:56 GMT 1
Original Pete Gibson pipes (ignore the pony hangers  )  OEB |
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Post by jon on Jul 16, 2018 18:59:59 GMT 1
Original Pete Gibson pipes (ignore the pony hangers ) OEB Well there you have it. The reverse cones on these will give a very narrow and viscous powerband based on their angle. Jon |
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d5aul
L plate rider.
Posts: 38
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Post by d5aul on Jul 16, 2018 20:09:00 GMT 1
Well OEB’s appear to be a fairly different shape to mine, yet the fabrication style looks similar! Maybe mine were originally for a TZ? I will have to try them once I get the bike running, the curiosity in me wants to see what they do to the power.
Doubt they would stay on for long though, the pipes currently fitted look much nicer & a more conventional shape.
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Post by oldelsieboy on Jul 16, 2018 20:34:44 GMT 1
Well OEB’s appear to be a fairly different shape to mine, yet the fabrication style looks similar! Maybe mine were originally for a TZ? I will have to try them once I get the bike running, the curiosity in me wants to see what they do to the power. Doubt they would stay on for long though, the pipes currently fitted look much nicer & a more conventional shape. My pipes were designed for use with a TZ350 motor. OEB |
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Post by jon on Jul 16, 2018 20:59:38 GMT 1
Well OEB’s appear to be a fairly different shape to mine, yet the fabrication style looks similar! Maybe mine were originally for a TZ? I will have to try them once I get the bike running, the curiosity in me wants to see what they do to the power. Doubt they would stay on for long though, the pipes currently fitted look much nicer & a more conventional shape. My pipes were designed for use with a TZ350 motor. OEB As I said OEB, those pipes will have a very narrow and viscous power band. I knew they were for racing, as that is where you have to keep a 2 stroke ‘on the boil’. TZ pipes were the obvious choice given the period. I doubt road Allspeeds were to this design. If they were perhaps that’s why the got the name of ‘no-speeds’? They would need a specific setup and riding style. Jon |
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Post by reedpete on Jul 16, 2018 21:09:02 GMT 1
Have you seen the power band on a 3G3....
power between 9k and 11.5K and the biggest grin there is to go with it.
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