Welcome to the Access Norton Forum. Login as a VIP member to remove the advertising banners.


Slimline Featherbed Landspeed Racer Build

Member's Norton Restoration Projects

Slimline Featherbed Landspeed Racer Build

Postby lcrken » Sun Oct 23, 2016 10:55 am

Hope I'm posting this in the right sub-forum. I'm rebuilding my landspeed Norton, and replacing the wideline featherbed frame with a slimline. The wideline is going to end up as a street bike.

First step was checking the frame for straightness. I measured the rake some time ago at 24°, but the stock rake for all featherbeds is 26°. I learned on the forum that featherbeds are very prone to bending at the steering head, so mine needed some straightening. I checked the front down tubes with a straight edge, and they were clearly bent near the steering head. This is the setup I used to bring the rake back to 26°'

Image

Image

The upright post is an old fork tube with a plate welded to the bottom and machined in the lathe to be flat and perpendicular to the post. It's bolted to the steel table. A small hydraulic jack under the rear cross member provides the force, and an oxy-acetylene torch with rosebud tip brings the tubes up to an orange heat in the appropriate area. I was fortunate that it only took two tries to get it right. I also put a bar through the swing arm pivot and measured its height at both ends to ensure that steering head and swingarm axes are perpendicular. Fortunately, they were, so I didn't have to do any twisting on the frame.

I thought about raking it out a bit more for high speed stability, but didn't because I'd like to keep it close to stock for later use. I can get the same stability by using fork yokes with less offset, which will provide more trail.

Ken
User avatar
Access Norton VIP Paying Member
lcrken
VIP MEMBER
Posts: 2802
Joined: Sun Mar 15, 2009 8:08 pm
Location: Southern California

Re: Slimline Featherbed Landspeed Racer Build

Postby Fast Eddie » Sun Oct 23, 2016 11:01 am

So, the 1007 road going hot rod / street beast is finished then ...
User avatar
Access Norton VIP Paying Member
Fast Eddie
VIP MEMBER
Posts: 3635
Joined: Fri Oct 04, 2013 12:48 am
Location: Oxford, England

Re: Slimline Featherbed Landspeed Racer Build

Postby grandpaul » Sun Oct 23, 2016 6:36 pm

This should be a fun thread to foll0w...
GrandPaul
author "Old Bikes"
too many bikes to list, including:
952 Prototype, MkIII Interstate, Combat Dunstall, Triton
User avatar
Access Norton VIP Paying Member
grandpaul
VIP MEMBER
Posts: 9667
View Photo Album - Images: 30
Joined: Tue Jan 15, 2008 1:11 pm
Location: Laredo (south) Texas

Re: Slimline Featherbed Landspeed Racer Build

Postby lcrken » Sun Oct 23, 2016 8:07 pm

Fast Eddie wrote:So, the 1007 road going hot rod / street beast is finished then ...


Ah well, sometimes the urge to start another project is too hard to resist. Besides, I need to have a race bike ready in time for next year's season. I missed this year, and don't plan to do that again. I am still going on the 1007, currently waiting on a 36 tooth front sprocket from Norvil, but still making small progress on other bits. I'll have another update soon.

Ken
User avatar
Access Norton VIP Paying Member
lcrken
VIP MEMBER
Posts: 2802
Joined: Sun Mar 15, 2009 8:08 pm
Location: Southern California

Re: Slimline Featherbed Landspeed Racer Build

Postby lcrken » Sat Oct 29, 2016 12:23 pm

The frame is now straight, cleaned up where the PO cut off lugs, and painted in my favorite Rustoleum gloss black. There are still dings and dents in the tubes here and there, but this is a race bike, so I'm not going for show finish here, just decent appearance and good rust protection. I think I'll make some bornze bushes to replace the rubber bushes in the swingarm, and then its on to assembly.

Ken

Image

Ken
User avatar
Access Norton VIP Paying Member
lcrken
VIP MEMBER
Posts: 2802
Joined: Sun Mar 15, 2009 8:08 pm
Location: Southern California

Re: Slimline Featherbed Landspeed Racer Build

Postby APRRSV » Sat Oct 29, 2016 2:42 pm

Hi Ken,
Will the bronze bushes offer any handling benefits or are you making them for a different reason?

Ed

APRRSV
Posts: 195
Joined: Sun Jun 26, 2016 6:47 pm
Location: Northern Virginia

Re: Slimline Featherbed Landspeed Racer Build

Postby lcrken » Sat Oct 29, 2016 3:48 pm

APRRSV wrote:Hi Ken,
Will the bronze bushes offer any handling benefits or are you making them for a different reason?

Ed


I believe eliminating the possibility of swing arm motion anywhere except in the vertical plane is a good idea for high speed stability. I'm running in classes at Bonneville that have records well over 150 mph. In the early '50s, Norton switched from the rubber Silentbloc bushes to sintered bronze bushes on their Manx race bikes, and it was common practice in later years for racers to do the same. When I got interested in motorcycles in the late '60s, the bronze replacement bushes were still a popular upgrade. It may not be necessary to replace the rubber bushings, but it seems like a good idea to me, and there doesn't seem to be any downside.

Ken
User avatar
Access Norton VIP Paying Member
lcrken
VIP MEMBER
Posts: 2802
Joined: Sun Mar 15, 2009 8:08 pm
Location: Southern California

Re: Slimline Featherbed Landspeed Racer Build

Postby APRRSV » Sat Oct 29, 2016 4:25 pm

lcrken wrote:
APRRSV wrote:Hi Ken,
Will the bronze bushes offer any handling benefits or are you making them for a different reason?

Ed


I believe eliminating the possibility of swing arm motion anywhere except in the vertical plane is a good idea for high speed stability. I'm running in classes at Bonneville that have records well over 150 mph. In the early '50s, Norton switched from the rubber Silentbloc bushes to sintered bronze bushes on their Manx race bikes, and it was common practice in later years for racers to do the same. When I got interested in motorcycles in the late '60s, the bronze replacement bushes were still a popular upgrade. It may not be necessary to replace the rubber bushings, but it seems like a good idea to me, and there doesn't seem to be any downside.

Ken


Ken, I had wondered about solid bushings since receiving my wideline frame and swingarm and realizing the silentblocs had a rubber layer.

Any chance you might make me a pair for a fee? Otherwise, do you know if they are available from any suppliers?

Thanks,
Ed

APRRSV
Posts: 195
Joined: Sun Jun 26, 2016 6:47 pm
Location: Northern Virginia

Re: Slimline Featherbed Landspeed Racer Build

Postby grandpaul » Sun Oct 30, 2016 7:14 am

$150 for a complete kit

Image

Image
GrandPaul
author "Old Bikes"
too many bikes to list, including:
952 Prototype, MkIII Interstate, Combat Dunstall, Triton
User avatar
Access Norton VIP Paying Member
grandpaul
VIP MEMBER
Posts: 9667
View Photo Album - Images: 30
Joined: Tue Jan 15, 2008 1:11 pm
Location: Laredo (south) Texas

Re: Slimline Featherbed Landspeed Racer Build

Postby lcrken » Sun Oct 30, 2016 12:18 pm

Nice looking kit, Paul. The reinforcing plates that bolt onto the frame are a great touch. The swingarm pivot holes eventually get really sloppy. I fixed them on my previous featherbed frame by welding on some heavy washers, but your solution looks simpler to implent. The holes on this frame are not worn yet, and I don't expect to put many miles on it, so hadn't planned to do any mods to the frame. Might have to reconsider that.

Ken
User avatar
Access Norton VIP Paying Member
lcrken
VIP MEMBER
Posts: 2802
Joined: Sun Mar 15, 2009 8:08 pm
Location: Southern California

Re: Slimline Featherbed Landspeed Racer Build

Postby lcrken » Sun Oct 30, 2016 12:48 pm

A conversion kit is also available from Unity, but a bit more expensive than Paul's, and may require some fitting.

http://www.unityequipe.co.uk/

Image

Ken
User avatar
Access Norton VIP Paying Member
lcrken
VIP MEMBER
Posts: 2802
Joined: Sun Mar 15, 2009 8:08 pm
Location: Southern California

Re: Slimline Featherbed Landspeed Racer Build

Postby grandpaul » Mon Oct 31, 2016 5:54 am

lcrken wrote:The reinforcing plates that bolt onto the frame are a great touch.

I must admit, I got the idea from my BSA 441 swingarm...
GrandPaul
author "Old Bikes"
too many bikes to list, including:
952 Prototype, MkIII Interstate, Combat Dunstall, Triton
User avatar
Access Norton VIP Paying Member
grandpaul
VIP MEMBER
Posts: 9667
View Photo Album - Images: 30
Joined: Tue Jan 15, 2008 1:11 pm
Location: Laredo (south) Texas


Return to Norton Motorcycle Rebuilds

Who is online

Users browsing this forum: No registered users and 1 guest