taps to rethread top yoke and head for 68 commando

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pierodn

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Hi All.
Please, i need to buy the taps to rethreadh, for my '68 commando:
-the fork top yoke to fix the handlebar clamp cap allen screws (items n. 06.0333).
I know the threadh that is 5/16" UNF but not the tips;
-the head to fix the the allen screws inlet manifolds (items n. 14.7019).

Thank you.
Piero
 
pierodn said:
-the fork top yoke to fix the handlebar clamp cap allen screws (items n. 06.0333).
I know the threadh that is 5/16" UNF...
Click to expand...
Yes.

pierodn said:
but not the tips;
Click to expand...

Tips?

pierodn said:
-the head to fix the the allen screws inlet manifolds (items n. 14.7019).
Click to expand...

1968 Commando Allen screws should be 5/16" Whitworth NM23412/06.7849, (7/32" Allen key size) therefore, the thread is the same.
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
Item 29:
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
 
L.A.B. said:
Yes.



Tips?



1968 Commando Allen screws should be 5/16" Whitworth NM23412/06.7849, (7/32" Allen key size) therefore, the thread is the same.
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
Item 29:
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
Click to expand...
Hi Les.
Sorry, for tips i meant the number like 5/16 x"26".
I thought that 26 were the tips.
Thanks.
Piero
 
maylar said:
Aren't the manifold screws 5/16-18 UNF?
Click to expand...
I'm sure you mean UNC.
The manifold screw part number did change (as it increased in length from 3/4" to 7/8") but the thread seems to have remained Whitworth although UNC screws are often substituted.
My Mk3 still had the Whitworth screws with the 7/32" Allen key sockets, not UNC 1/4".
www.accessnorton.com

Carb removal

Rather than take them apart, simply swap sides. I don't want to start the big discussion for the umpteenth time, but to me the turn signal on the right is weird. With it on the left, it works exactly like every car I've ever driven. Tks
www.accessnorton.com www.accessnorton.com
 
L.A.B. said:
I'm sure you mean UNC.
The manifold screw part number did change (as it increased in length from 3/4" to 7/8") but the thread seems to have remained Whitworth although UNC screws are often substituted.
My Mk3 still had the Whitworth screws with the 7/32" Allen key sockets, not UNC 1/4".
www.accessnorton.com

Carb removal

Rather than take them apart, simply swap sides. I don't want to start the big discussion for the umpteenth time, but to me the turn signal on the right is weird. With it on the left, it works exactly like every car I've ever driven. Tks
www.accessnorton.com www.accessnorton.com
Click to expand...
Thank you Les,
i have bought 5/16 18 TPI BSW from Tracy Tools.
Please, is the allen CAP SCREW 5/16" BSF x 3/4 (item n. 06.7745), to fix the head steady, of 22 TPI?
Thank youso much.
Piero
 
Last edited:
kommando said:
5/16 BSF tpi is 22.
Click to expand...
Thank you.
Sorry, every time i need to know a threadh i must disturb you fans.
Please, where i can read the measures for all the Commando studs, nuts, screws, etc,?.
Can i find such information on the workshop manual?.
Thank you.
Piero
 
pierodn said:
Thank you.
Sorry, every time i need to know a threadh i must disturb you fans.
Please, where i can read the measures for all the Commando studs, nuts, screws, etc,?.
Can i find such information on the workshop manual?.
Thank you.
Piero
Click to expand...
Don't worry about asking Piero it's always good to ask here first mate !!!
English threads are very confusing
Do you have a thread pitch gage? They are worth having
 
L.A.B. said:
I'm sure you mean UNC.
The manifold screw part number did change (as it increased in length from 3/4" to 7/8") but the thread seems to have remained Whitworth although UNC screws are often substituted.
Click to expand...
Yes, I meant UNC. I found some stainless 5/16-18 screws at the local hardware store but was dismayed that the hex key was 1/4 rather than 7/32.
 
maylar said:
Yes, I meant UNC. I found some stainless 5/16-18 screws at the local hardware store but was dismayed that the hex key was 1/4 rather than 7/32.
Click to expand...
The correct screws are bsw 55° and take the 7/32 Allen key as far as I can remember
But as lab says the UNC 60° screws often get used
Just be careful not to strip the threads out
 
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