I'll share with you my observations, findings and opinions in the articles below.
I hope the content makes up for the lack of glossy & flashy presentation.
This page will be occasionally changed and added to, as my free time allows.
David Comeau
last updated Mar 2007ENGINE
Norton heavy twins head evolution pictorial
1950 model 7 500cc through 75 RH-4 850 Electric Start CommandoAutomatic timing chain adjuster-twin chain motors
Norton heavy twins cam profile survey added profiles
Norton heavy twin cam hardness/softness
Norton heavy twin - crank case evolution
A few pictures of the timing side - from Atlas to E-Start.GEARBOX
PRIMARY/CLUTCH
Easy Pull, No Drag, No Slip Commando ClutchAtlas belt drive
No mod usually goes without a hitch, this one was no exception.OIL/LUBE
Commando oil filter cross referenceNorton 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.FRAME&FITTINGS
frame#sMOUNTINGS/ISO
The Isolastics are of interest to me, so I have finally done a measurement of the front ISO compression rates.
Front ISO ratesFRONT SUSPENSION
Atlas/Commando ForksWHEELS-BRAKES-TIRES f&r
REAR SUSPENSION
BODYWORK-tanks-seats-sidecovers-fairings
Norton Fiberglass BodyworkCARBURETOR/MANIFOLDS/AIR CLEANERS
IGNITIONS
Boyer Exposed The Original Boyer MK III for Norton Commando-detailed analysis originally written in 1990Boyer Evolved Norton Commando ignitions overview Updated June 2005
Coil measurements from different types and styles new Mar 2007
ELECTRICAL GENERAL
Lucas RM24 3 phase power output curve 130k.jpgMISC...
MODEL SPECIFIC,
HOT ROD NORTONS,
EXTRA PERFORMANCE MODS AND EQUIPMENT, Dunstall, Gus Kuhn, Norvil, etc.1975 Electric Start Commando
Hi-Rider 1971 through 1975
Nortons answer to the chopper.....the ugly duckling of the commando body styles
