Rebuild question

Dan, the hex footrest rod on mine was 1/2" x 26tpi (1/2" BSC).

I also had trouble with the hook for center-stand. My memory is a bit fuzzy but if I remember right I turned a spigot on a nut to fit the hook over allowing the hook to rotate as the stand went up. Hope that makes sense.

Hi Dan,

The hook for the cenre stand swivels on the bottom engine stud that you mention and just like Douglas I machined the nut to suit. All mine are the earlier frame though.

The footrest bar on my Navigator which I am sure is an original thread is 1/2" cycle thread same as Douglas says. On the Jubilee it is UNF but I doubt if this is original.

The centre channel is the same part for both standard and de luxe so the holes you have in mind are probably where the oil tank is mounted on the de luxe. The rectifier is usually bolted on the back of this channel on the standard.

Patrick

Previously Dan Field wrote:

Thanks guys, if you look at the NOC spares - misc page 3 you can see that the hole for the hook is much lager on the post 64 models, taking what you have said, I'm thinking that it sits over the centre channel reinforcing lugs. I'll try it tomorrow, not there's much room under there! I'm still not sure if there is a special nut for that mounting?

Dan

Hi Dan

I have sketches etc on the fitting of both the pre and post 64 centre

stand obtained from the noc teech team when I rebuilt my electra but I have not been able to attach so drop me a email and I will forward to you

regenerated.jazz@btinternet.com

regards trevor veale

Hi Dan,

I own, or have owned. a 1965 Navigator and a 1964 Electra. So am familiar with the build of these models, which feature the later gearbox and the frame to suit.

You ask for information on all the holes in the frame centre section channel assembly 24618. Iâm using the terminology in Norton Parts List, Publication P100, Electra. Also, the lightweight frame exploded drawing (Delux) on page 54 of Norton Twin Cylinder Manual, Lightweight Twins and Heavyweight Twins, published by Norton late â60âs and also printed in Clymer covers for USA.

So, starting at the bottom of the channel, and generally going up and clockwise when viewing from the right of the machine.

Hole 1. Tube through each side of channel, 7 ? ins long, 5/8 ins ID. This is for the hexagonal footrest rod.

Hole 2. Hole in each side of channel, ? ins dia. This is for the centre stand spindle. There is an inner centre stand spacer and two outer spacer tubes.

Hole 3.A pair of holes in the bottom centre section of the channel. ? ins dia and on 1 ? ins ctrs. These are the mounting holes for the centre stand stop plate, which should project to the left of the machine.

Hole 4. Reinforced and slotted hole each side of channel. 3/8 ins slot. This is for the lower rear engine mounting stud. The nuts which you enquire about are the same at each end of the stud. Both special nuts are 3/8 ins cycle thread but with a larger hexagon size of around ? ins AF. No washers used. The nuts are turned down at one end to form a spigot about 5/16ins long and 5/8 outside dia. The centre stand anchor arm fits over the 5/8 ins diameter on the right hand nut. The nut when tightened locates, but does not trap, the anchor arm.

Hole 5. Single hole in centre section of channel, ? ins dia. This hole is for the rear mudguard bottom bracket 23060. Fit the bracket with the bolt below the bracket. It makes future maintenance easier but holding the nut/bolt on channel inside is still very taxing with engine in place.

Hole 6. Tube attached to back of centre section of channel. 7/16ins ID. This is for the swinging arm spindle. Some advice for you as this is the weakest part of the centre section and especially thin on lightweights with later gearbox. Check the security of the side plates and welds that secure the tube in place. Broken plates and welds are common. Norton did not weld the tube direct to the back of the channel because the weld will pull the channel backwards, out of straight. Even a small shunt will result in a backward bend on this part of the channel. You can check for bend quite easily by putting a straight edge or bar down the full length of the inside centre channel. If itâs bent, the whole frame reassembly process becomes a B*****D. Iâve straightened a bent channel with stout vice and large blows with a weighty copper hammer. Donât forget the wood blocks too.

Hole 7. Holes in each side of channel, 3/8 ins dia. These are for the upper rear engine mounting stud. Donât forget the chainguard forward extension on LHS.

Hole 8.A pair of holes in the centre section of the channel. 3/16 ins dia and on 1 3/4 ins ctrs. These are the mounting holes for the starter solenoid for the Electra. Not used on Navigator.

Hole 9. 11/16ins dia hole in back section. Used for cabling (Starter motor cable in Electra)

Hole 10. Slot 1/4ins by ? ins on LHS of channel. ? Maybe someone else found a use for this. I used it for wires because the styling panels are so close to the channel front edges that any cable running over the channel edges will likely be trapped and cut.

Hole 11. Single hole in centre section of channel, ? ins dia. This hole is for the second battery carrier on Electra. Not used on Navigator but it seems from this thread some use it for the rectifier.

Hole 12. Hole in right hand side of centre section ? ins dia. This is the earthing point for the frame. The rectifier is mounted outside the channel, terminals upwards. It is close to the styling panels so beware. I slope the rectifier a few degrees forward to be sure. The central post of the rectifier, inside the frame, is attached with a very rough spring washer and the two or three tags of translucent cables which are on the original looms. If you choose to use hole 11, you may find the original loom wonât have the length to make all the rectifier connections.

Hole 13. 11/16ins dia hole in back section. Could be used for cabling but is used on Electra for second battery carrier.

Hole 14. In a tube 7 ? ins long welded to the back, top, of the channel, 3/8 ins dia. This tube is also subject to accident or abuse and Iâd advise you to check it for straightness. Fore and Aft and Up and Down. Otherwise, assembly will not be the easy reversal of disassembly.

Hole 15. Vertical slot 1/4ins by ? ins on LHS of channel. Used for the security and alignment of the petrol tank rear fixing bracket.

Hole 16. Holes in each side of channel, 3/8 ins dia. at top. These for the petrol tank rear fixing bracket and the two spacers between the channel sides and the tubular frame sections. All secured by a 3/8 ins through stud.

There will be lots of other puzzles as your build proceeds and I wish you well. An illustrated parts list and the twin cylinder manual are very helpful purchases. I couldnât have helped you without the part alongside to refresh my memory.

Peter Holland

Previously Dan Field wrote:

Thanks guys, if you look at the NOC spares - misc page 3 you can see that the hole for the hook is much lager on the post 64 models, taking what you have said, I'm thinking that it sits over the centre channel reinforcing lugs. I'll try it tomorrow, not there's much room under there! I'm still not sure if there is a special nut for that mounting?

Dan