Straight shot manifolds on JP Norton

MichaelB · Sep 26, 2021

Thanks for posting those Ken.
I doubt any of us get bored with anything Norton. Post away….

marinatlas · Sep 26, 2021

lcrken said:
At the risk of boring everyone some more, this is yet another shot of a monocoque with straight manifolds and MK1 Concentrics, this one on the ex Dave Aldana bike that Jamie Waters bought from the Frutiger brothers a while back.

View attachment 82042

Ken

I think that only the carbs are bored

lcrken · Sep 26, 2021

marinatlas said:
I think that only the carbs are bored

Could be. I recall boring the 32s on my PR out to 33 mm back in the '70s.

Ken

jseng1 · Sep 26, 2021

lcrken said:
This picture, although kind of fuzzy, shows the Quantel Cosworth Norton fitted with MK2 Concentrics modified to use matchbox remote float bowls. I remember seeing them and thinking how clever that was. The seemed to work quite well, although Quantel eventually switched to fuel injection.

View attachment 82043

An even better picture from Brands Hatch showing more details.

View attachment 82044

Ken

I had the same problem with steep carb angle and had to use a remote bowl - a large bowl near the valve cover with a huge needle that could feed both carbs.

Straight shot manifolds on JP Norton

MichaelB

"Sons of Arthritus"

marinatlas

lcrken

jseng1

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