International Norton Owners Association

Singles

Norton Singles Lubrication by John Basham

Twins

Norton All Models Manual from 1968 by Norton Villiers Ltd. (pdf)

Engine

Norton heavy twins cylinder heads by Dyno Dave Comeau

Automatic timing chain adjuster-twin chain motors by Dyno Dave Comeau

Norton heavy twins cam profile survey by Dyno Dave Comeau

Norton Heavy Twin Cam Hardness/Softness by Dyno Dave Comeau

Norton heavy twin - crank case evolution by Dyno Dave Comeau

Gearbox
Primary/Clutch

Easy Pull, No Drag, No Slip Commando Clutch by Dyno Dave Comeau

Commando clutch packs by Dyno Dave Comeau

Atlas belt drive
No mod usually goes without a hitch, this one was no exception. by Dyno Dave Comeau

Dommi/Atlas Clutch Rod Seal by Dyno Dave Comeau

Oil/Lube

Commando oil filter cross reference by Dyno Dave Comeau

Oils and Temperature Testing (pdf) by Alan Goldwater

Oil Seal Testing (pdf) by Alan Goldwater

Norton oil pump & wet sumping
Drawing of the Nortech mod (now out of business?) that was done to Frank D. oil pump and cover, worth doing if your pump is not up to snuff. AMR may be doing this mod now. by Dyno Dave Comeau

Breather Valve Fixes Oil Leaks (pdf) by Alan Goldwater

Oil Pressure Light Switch (jpg)

Oil filter bracket for a slimline frame. By Dyno Dave Comeau

Frame&Fittings

frame#s by Dyno Dave Comeau

Ross Elliot has supplied plans for a P11 skid plate and clamps for those unable to find one in usable condition.

Mountings/Isolastics
Measurements of front ISO compression rates.

Front ISO rates by Dyno Dave Comeau

Front Suspension

Atlas/Commando Forks by Dyno Dave Comeau

Roadholder modifications the whole story by Peter Crespin

Wheels-Brakes-Tires

Installing a Bicycle Speedometer (pdf) by Jeffrey Potter

Brake Pad Tests (pdf) by Alan Goldwater

Mounting a Brembo caliper and 12" rotor on Norton fork (pdf) by Alan Goldwater

Template for Mounting a Brembo caliper (pdf) by Alan Goldwater

Rear Suspension

Swing Arm Repair (pdf) by Alan Goldwater

Bodywork-tanks-seats-sidecovers-fairings

Lining Fiberglass Tanks (pdf) by Mike Taglieri

Norton Fiberglass Bodywork by Dyno Dave Comeau

Applying Decals to your Norton (pdf) by Alan Goldwater

Carburetor/Manifolds/Air Cleaners

Amal Concentric Carburetor (pdf) by Alan Goldwater

Ignitions

Boyer Exposed Detailed analysis of the Boyer MK III for Norton by Dyno Dave Comeau

Boyer Evolved - analysis updated Dec 2003 by Dyno Dave Comeau

Electrical - General

Lucas RM24 3 phase power output curve (130k.jpg) by Dyno Dave Comeau

RM 15 specs & testing by Dyno Dave Comeau

zener regulation curve by Dyno Dave Comeau

E-Start cable upgrade by Dyno Dave Comeau

A collection of Lucas Service Manuals

History and Reviews