Norton Atlas with an offset crank

N0rt0nelectr@ said:

Didn't Phil Irving write an article on this back in the 50's. A friend who isn't on this forum built one using a Commando engine with Hinze Keglers help.
I have seen it run and he wasn't afraid to take it on long rides either. I remember him riding it up to the rally in Torry Utah from Albuquerque. They also built a 2 finger clutch for an Atlas. It almost didn't need clutch springs. I know I have pictures of the clutch, just not sure where.

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Here is a picture of the modified clutch for a pre-Commando clutch.

N0rt0nelectr@ said:

Didn't Phil Irving write an article on this back in the 50's. A friend who isn't on this forum built one using a Commando engine with Hinze Keglers help.
I have seen it run and he wasn't afraid to take it on long rides either. I remember him riding it up to the rally in Torry Utah from Albuquerque. They also built a 2 finger clutch for an Atlas. It almost didn't need clutch springs. I know I have pictures of the clutch, just not sure where.

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More discussion about it in this thread…

Here is one that has an 270/450 90 degree offset crank. Sir Eddy wanted to build the fastest 500cc Norton on the planet and to get there he believed the 270/450 set up was going to give him the advantage to make it happen.
It was his dream and after many years of development we made it a reality.
It started with rephrasing the crank and bolting it back together, at 10,000 RPM the fear was that the crank bolts might say uncle.
He then decided to get a hunk of steel and make a billet, one piece crank, that worry went away...
He rephrased the cam, and sent it off to Web Cam to make it a 270/450 cam, built a cylinder out of a block of aluminum, modified the head and made some hi dome pistons.
His dream came true in 2016, I kinda like the new noise the Rocket makes...



21 minutes into this one you hear the firing order at speed in the distance.

Son of Siredward said:

Here is one that has an 270/450 90 degree offset crank. Sir Eddy wanted to build the fastest 500cc Norton on the planet and to get there he believed the 270/450 set up was going to give him the advantage to make it happen.
It was his dream and after many years of development we made it a reality.
It started with rephrasing the crank and bolting it back together, at 10,000 RPM the fear was that the crank bolts might say uncle.
He then decided to get a hunk of steel and make a billet, one piece crank, that worry went away...
He rephrased the cam, and sent it off to Web Cam to make it a 270/450 cam, built a cylinder out of a block of aluminum, modified the head and made some hi dome pistons.
His dream came true in 2016, I kinda like the new noise the Rocket makes...


View attachment 118788

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Thanks for taking the time to post. Very inspirational.

any info on the record nort swingarm?

comes up here

74ok said:

any info on the record nort swingarm?

comes up here

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I have zero info about a lot of things Norton, but I'd like to know some of the secrets.

74ok said:

any info on the record nort swingarm?

comes up here

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Set two records in the M-PG500 and MPS-PG500 classes in 2016. The video is on the week.
Beat the previous records by over 10MPH.
The swing arm is a shortened and modified RM250…