Search found 929 matches

by Richard Negus
Sat Dec 01, 2018 10:10 am
Forum: technical interest and new ideas
Topic: sealant
Replies: 1
Views: 38

Re: sealant

Terry, For the rotor housing joint faces, use a thin smear of Wellseal. Stationary gear O-rings, use high temp RTV, Loctite 5368 or similar. All other joint faces, use 5368 or similar. Both eccentric shaft nuts; Loctite 270, 150 lb.ft. Clutch nut; 270, 100lb.ft. Orange RTV is almost as bad as the Re...
by Richard Negus
Fri Nov 30, 2018 8:09 pm
Forum: login and say hello!
Topic: Removing old engine coating from IP2 housings
Replies: 6
Views: 139

Re: Removing old engine coating from IP2 housings

"A picture's worth a thousand words....." Fear not -that's normal. It's just discoloration by the pre-treatment and plating fluids. The joint face shows clean aluminium as it was ground to size after the plating process was completed. All other machined faces are completed before plating and will sh...
by Richard Negus
Fri Nov 30, 2018 3:01 pm
Forum: login and say hello!
Topic: Removing old engine coating from IP2 housings
Replies: 6
Views: 139

Re: Removing old engine coating from IP2 housings

How about a photo?
Depending on the age of your IP2, the coating was probably done by BAJ Coatings (now defunct) at Weston super Mare. One of their chemical dips left a dark grey finish to the un-machined areas.
R.
by Richard Negus
Fri Nov 30, 2018 9:35 am
Forum: login and say hello!
Topic: Removing old engine coating from IP2 housings
Replies: 6
Views: 139

Re: Removing old engine coating from IP2 housings

Hi, Welcome to the forum. Are you sure the surface you're seeing isn't the original silver powder coating that's gone hard and yellow with age? Try scratching the side of an outside fin to see if that's so. Usually, industrial strippers such as Thyssen Krupp in Tamworth get down to bare metal, no pr...
by Richard Negus
Thu Nov 29, 2018 10:12 am
Forum: technical interest and new ideas
Topic: F1 Sport seat unit
Replies: 5
Views: 117

Re: F1 Sport seat unit

Hi Terry, The pad is that size 'cos it's a close replica of those fitted to the JPS race bikes of the time. Other comments about it were along the lines of "Make it uncomfortable so the rider goes faster to get to the end of the race first". Seemed to work anyway! For one of the Rugeley twin-seat bi...
by Richard Negus
Thu Nov 22, 2018 9:39 pm
Forum: technical interest and new ideas
Topic: Commander colours
Replies: 9
Views: 155

Re: Commander colours

Tony,
Lookin' good!
Thirty years old design and still a modern touring bike.
R.
by Richard Negus
Thu Nov 22, 2018 10:46 am
Forum: technical interest and new ideas
Topic: Commander colours
Replies: 9
Views: 155

Re: Commander colours

Terry, To the best of my knowledge, all of the non-Grey colours were not specific to any make/model of other vehicle. Over the production period, several different paint shops were used so it's quite possible that that one's Candy Red was not quite the same as another's. For a non-rotary project, I ...
by Richard Negus
Wed Nov 21, 2018 9:30 pm
Forum: technical interest and new ideas
Topic: interpol timing marks
Replies: 1
Views: 50

Re: interpol timing marks

Sorry, there are none! But, the vertical axis of the engine is the line between eccentric shaft and the bottom stud. TDC is when the flywheel key is at either 9 o'clock to that line for the l/h rotor or 3 o'clock for the other. Full advance timing, although not critical, is alleged to be at 18 BTDC,...
by Richard Negus
Wed Nov 21, 2018 10:04 am
Forum: technical interest and new ideas
Topic: Commander colours
Replies: 9
Views: 155

Re: Commander colours

Terry, Whilst Jaguar Dorchester Grey was the standard colour, there were quite a few that were painted other colours and about six that were polished white self-colour mouldings like the police machines. The Candy Red ones tended to fade to a gold colour in strong sunlight, but the ones in metallic ...
by Richard Negus
Sat Nov 17, 2018 9:29 am
Forum: general discussion (eveything else)
Topic: Classic up for Auction
Replies: 7
Views: 208

Re: Classic up for Auction

You may be thinking of the prototype numbered PP001 which was used, amongst other things, the brochure photos.
It had a slab-sided tank and a very thin seat.
Now in a rotary enthusiast's private collection in Germany.
R
by Richard Negus
Thu Nov 15, 2018 10:22 am
Forum: general discussion (eveything else)
Topic: Classic up for Auction
Replies: 7
Views: 208

Re: Classic up for Auction

There are two air-cooled Norton rotaries in the Mecum catalogue. One, as above, is a converted IP2 described as a 'Classic' but bearing little resemblance to a genuine Norton Classic. Badly done too. But, there is also, according to the description as there's no photograph, genuine Classic LE001. Th...
by Richard Negus
Tue Nov 06, 2018 12:52 pm
Forum: technical interest and new ideas
Topic: spark plug caps
Replies: 8
Views: 295

Re: spark plug caps

With the 10 ohm caps, you can then use copper cored HT lead instead of the usual resistive cable.
R.
by Richard Negus
Mon Nov 05, 2018 8:08 pm
Forum: technical interest and new ideas
Topic: spark plug caps
Replies: 8
Views: 295

Re: spark plug caps

Following the man-who-knows (Julian Kemp), I bought a pair of 10 ohm straight caps from France via Ebay.
Reference is NGK SD10F, still available from France at £4.95 each.
R.
by Richard Negus
Thu Oct 25, 2018 1:04 pm
Forum: technical interest and new ideas
Topic: clutch plates
Replies: 2
Views: 221

Re: clutch plates

Tch, tch! Bronze plate first and the last plate against the alloy pressure plate should be steel.
R.
by Richard Negus
Wed Oct 24, 2018 7:00 am
Forum: technical interest and new ideas
Topic: Woodruff Key
Replies: 7
Views: 207

Re: Woodruff Key

There are two popular types of oil seal, known as R21 and R23. R21 is the standard type of seal, single sealing lip with a garter spring on the inner oily side. R23 is an option that has the sealing lip as above and also has a second wiper lip on the other dry, or outer, side. The purpose of the sec...
by Richard Negus
Tue Oct 23, 2018 8:40 am
Forum: technical interest and new ideas
Topic: Woodruff Key
Replies: 7
Views: 207

Re: Woodruff Key

John,
The spring always faces the more oily side, in this case towards the mainshaft bearing.
Your original seal would have had a spring, perhaps it became dislodged and lost when removing the seal from the gearbox plate.
R.
by Richard Negus
Mon Oct 22, 2018 7:28 pm
Forum: technical interest and new ideas
Topic: Woodruff Key
Replies: 7
Views: 207

Re: Woodruff Key

John,
If the key is loose, smack the radiused edge with a hammer (gently) to deform it so that it's tight in the groove.
Keyway anywhere between 9 and 12 o'clock makes it easier to watch on assembly.
Patience is a virtue!
R.
by Richard Negus
Fri Oct 19, 2018 8:38 am
Forum: technical interest and new ideas
Topic: Gasket or not?
Replies: 4
Views: 153

Re: Gasket or not?

Now....if you could just recommend a fix for the rattling front forks....... cry Mick. Mick, As a Saab dealer once said to me about a noisy gearbox, "Yes Sir, they all do that" Doug Hele came up with a fix using shims to reduce movement of the damper piston and reduce the rattle. AN may still have ...
by Richard Negus
Thu Oct 18, 2018 10:50 pm
Forum: technical interest and new ideas
Topic: Gasket or not?
Replies: 4
Views: 153

Re: Gasket or not?

There's never been a gasket there, so your sealant of choice.
ThreeBond, aka Yamabond, or RTV silicone works for me.
There's an O-ring where the elbows join to the frame; a smear of RTV there doesn't come amiss.
R.
by Richard Negus
Sat Oct 13, 2018 8:35 am
Forum: technical interest and new ideas
Topic: Commander fuel tap seal
Replies: 2
Views: 121

Re: Commander fuel tap seal

It's possible the original source might have been Yamaha as IP2 handlebar switches came from there.
Around that time, Norton tried to adapt the Yamaha XS750 into a police bike (without any commercial success) so perhaps the tap came from that model.
R.
by Richard Negus
Thu Oct 11, 2018 10:35 pm
Forum: technical interest and new ideas
Topic: Starter Sprag slipping
Replies: 14
Views: 398

Re: Starter Sprag slipping

Those starter motors were originally made for the Triumph T160. The only change for the Norton application was a new drive end plate and an oil seal. IP2/Classic/Commander motors run in the opposite direction, so had the brush wires reversed and the direction arrow on the casing re-stamped. F1 motor...
by Richard Negus
Thu Oct 11, 2018 6:00 pm
Forum: technical interest and new ideas
Topic: Starter Sprag slipping
Replies: 14
Views: 398

Re: Starter Sprag slipping

Mick Taylor wrote:
Thu Oct 11, 2018 6:46 am
.....lets hope the starter motor is an exceptionally good quality reliable part.... wink

Mick.
Of course they are! All made in 1975 by Joe 'Prince of Darkness' Lucas and built in India.
by Richard Negus
Wed Oct 10, 2018 10:30 pm
Forum: technical interest and new ideas
Topic: Starter Sprag slipping
Replies: 14
Views: 398

Re: Starter Sprag slipping

Mick,
Just dismantle all the primary drive and you'll find it in the back of the clutch drum. Some simple tools and about four hours work, end to end. Seemples!
Now if it were the starter motor that needs replacing, that's very character-building.
R.
by Richard Negus
Sun Oct 07, 2018 5:47 pm
Forum: technical interest and new ideas
Topic: Carb adjustment
Replies: 35
Views: 922

Re: Carb adjustment

Tony, Thanks for the photo; confirms what I suspected - the brass jet is redundant in the Norton rotary application, a left-over from the same carburettor with a throttle spindle and butterfly for car applications. In the flat area of the carb bore, there are two holes drilled at about 45 degrees: D...
by Richard Negus
Sat Oct 06, 2018 10:42 pm
Forum: technical interest and new ideas
Topic: Carb adjustment
Replies: 35
Views: 922

Re: Carb adjustment

I recall also squirting carb cleaner up that passage and not coming to any conclusion; tomorrow will tell.

I'm not clear whether Tony Duffield's comment suggests there was a hole but no jet, or no hole at all in one of his carbs.
Nighty night!
R.
by Richard Negus
Sat Oct 06, 2018 8:26 pm
Forum: technical interest and new ideas
Topic: Carb adjustment
Replies: 35
Views: 922

Re: Carb adjustment

Thank you again Richard, I shall have a crack at converting one of my gaskets today.....I think I'll leave the other side alone, despite the parts list pictures, both gaskets should have the cut-out as they both have a fuel/air flow at idling. Would the Mikuni stockists be these people? http://www....
by Richard Negus
Sat Oct 06, 2018 8:44 am
Forum: technical interest and new ideas
Topic: Carb adjustment
Replies: 35
Views: 922

Re: Carb adjustment

Thirty years to notice there's another error in the IP2 and Classic parts list! Fortunately, the Commander and F1 Sport lists are correct in specifying 50.0374 as the correct gasket for all SU installations. Andover don't list it as an available part, but easy enough to make from 55.0453 with either...
by Richard Negus
Fri Oct 05, 2018 10:55 pm
Forum: technical interest and new ideas
Topic: Carb adjustment
Replies: 35
Views: 922

Re: Carb adjustment

Mick, That's the outlet gasket and casting. Look at the other end of the carb for the gasket that might be wrongly assembled.. By the way, the gasket you show should have a cut-out from the main bore to match the machining on the outlet casting. Your third photo shows that machining. Did AN supply t...
by Richard Negus
Wed Oct 03, 2018 7:31 pm
Forum: technical interest and new ideas
Topic: Carb adjustment
Replies: 35
Views: 922

Re: Carb adjustment

Mick, Your fuel tap still has a prime function, but the lever plate (held with two screws) was replaced with a Norton one that doesn't allow prime to be used. This was because, if left in the prime position with a hot engine, fuel evaporates from the float chambers and ends up in the engine. The flo...
by Richard Negus
Wed Oct 03, 2018 12:58 pm
Forum: technical interest and new ideas
Topic: Fuse Block
Replies: 10
Views: 325

Re: Fuse Block

This is a two wire pattern part......is this the one Richard? That'll do the job; a longer cable allows you to put the connection in a drier place It seems worth having one just in case.. Venhill sell numerous versions of this part which on the face of it could be adapted to repair or replace a fai...