Steering Lock Plate?

Status
Not open for further replies.
Dan1950

Dan1950

1974 MK II Roadster
VIP MEMBER
Joined
Aug 19, 2021
Messages
1,368
Country flag
Steering Lock Plate?


How is this applied to the frame? There is a pad that this can be attached to welded to the frame under the top yoke. The plunger from the lock cylinder will almost reach the existing pad.

I know that this will not deter an experienced, motivated thief, but it would make a quick roll off more difficult.

Is it welded to the frame pad through the slot?
 
Dan1950 said:
How is this applied to the frame? There is a pad that this can be attached to welded to the frame under the top yoke.
Click to expand...

The Mk3 lock plate (now apparently supplied instead of the previous plate) is welded directly to the headstock.
andover-norton.co.uk

Andover Norton Parts Drawings - Genuine Andover Norton Factory Parts - Commando Parts

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk

Dan1950 said:
Is it welded to the frame pad through the slot?
Click to expand...

There's no frame pad.
 
L.A.B. said:
The Mk3 lock plate (now apparently supplied instead of the previous plate) is welded directly to the headstock.
andover-norton.co.uk

Andover Norton Parts Drawings - Genuine Andover Norton Factory Parts - Commando Parts

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk



There's no frame pad.
Click to expand...
On mine there is but it's too low for the cylinder plunger to reach. Is there any way to get the cylinder deeper into the yoke?

It looks a bit different than the photo. No holes or slots. The plunger would go past the end of the plate if it had just a bit more travel.
 
Dan1950 said:
On mine there is but it's too low for the cylinder plunger to reach. Is there any way to get the cylinder deeper into the yoke?
Click to expand...
My Mk3:
Steering Lock Plate?


Dan1950 said:
It looks a bit different than the photo. No holes or slots. The plunger would go past the end of the plate if it had just a bit more travel.
Click to expand...

Yes, the previous type was a flat plate with no slot or holes. The pin locates at the end of the plate.
 
L.A.B. said:
My Mk3:
Steering Lock Plate?




Yes, the previous type was a flat plate with no slot or holes.
Click to expand...
Can the cylinder be positioned deeper in the yoke?

Right now it almost contacts the lock plate.
 
Dan1950 said:
Can the cylinder be positioned deeper in the yoke?
Click to expand...

The lock cylinder should locate to the depth shown in the link below:

steering lock removal

I'm wanting to get the yoke of my '74 powder-coated, which means removing the lock. I did find a thread on this here, but wanted to confirm how to do it. There is no visible split pin or any other way that the lock appears to be secured to the yoke. Is it indeed simply a press-fit which can...
www.accessnorton.com www.accessnorton.com
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
 
OK here is what I had. The plunger would come down far enough to almost touch the lock plate. The top of the cylinder was flush with the top of the yoke.
Steering Lock Plate?



The bottom of the cylinder was flush with the bottom of the yoke.
Steering Lock Plate?



I found a deep well socket that matched the OD of the cylinder and tapped the cylinder deeper into the yoke.
Steering Lock Plate?



Now, the bottom of the cylinder protrudes below the bottom of the yoke similar to what was shown in the pictures you posted.
Steering Lock Plate?



Now, my only concern is that with a screw driver, a thief can easily pry the cylinder upward to make the steering lock ineffective.
 
Dan1950 said:
Now, my only concern is that with a screw driver, a thief can easily pry the cylinder upward to make the steering lock ineffective.
Click to expand...

Yes, the pre-Mk3 steering lock is a bit of a token gesture as it can be knocked upwards/removed unlike the Mk3 with the (slightly) more secure Neiman lock that is fitted from below. At least you know what to do if you lose your steering lock key!
 
L.A.B. said:
Yes, the pre-Mk3 steering lock is a bit of a token gesture as it can be knocked upwards/removed unlike the Mk3 with the (slightly) more secure Neiman lock that is fitted from below. At least you know what to do if you lose your steering lock key!
Click to expand...
I think I might be able to add a bit of security without much difficulty. A roll pin above the cylinder would make it hard to pry the cylinder up. Just long/deep enough to prevent upward movement of the cylinder. The cylinder would still be removed/inserted from below like the MK III.

I look at the steering lock as a preventative for target of opportunity thieves. At least they wont be able to roll it away without some sort of assistance.

As far as losing my SL key? I keep the spare set of (both) keys in an inconspicuous inside pocket of my leather jacket. If I am any distance from home, my leather jacket goes with me.
 
Just to dispel any ideas that the cylinder/pin has been damaged, I removed the cylinder to take some pictures of the end of the pin and the travel.

Steering Lock Plate?



Note that there is no evidence of trauma and the travel is normal.

Steering Lock Plate?

Steering Lock Plate?

Steering Lock Plate?



When the cylinder is seated against the shoulder in the top yoke, the cylinder comes within about 1/8" of the lock plate and when the pin is extended, it protrudes far enough to engage the ends of the frame lock plate.
 
Status
Not open for further replies.
Back
Top