Become a Member: Get Ad-Free Access to 3,000+ Reviews, Guides, & More

1966 Norton Atlas

1966 Norton Atlas

1966 NORTON ATLAS HISTORY
The story starts not with a Norton at all, but with the 1938 Triumph 500 Speed Twin, the world’s first “modern” vertical twin. The rest of the British motorcycle industry went nuts and rushed to field their own 500 twins. But WWII got in the way, putting things off until after the war. But once civilian production resumed British vertical twins started popping up all over. BSA was first in 1946 with their A7 (500). Norton and Matchless both launched their first 500 twins in 1949, Norton calling theirs the Model 7.

1966 NORTON ATLAS HAS THE FEATHERBED FRAME
In 1950 Norton introduced the game-changing Featherbed Frame for it’s road racing Manx singles, and by 1953 they’d dropped the Model 7’s 500 twin-cylinder engine into the new frame, creating the Dominator 88. In 1956, they punched the 500 out to a 600 and renamed the bike the Dominator 99. In 1960 they did it again, this time to 650cc and added twin carbs for the 1961 Dominator 650SS which ran through 1969, overlapping the 1968 introduction of the iconic 750 Commando. But Norton wasn’t done yet.

THE NORTON ATLAS IS BORN
Norton once again enlarged this same old engine that was launched in 1949 as a 500, then a 600, then a 650, and now a 750. With the added displacement came a new name: Norton Atlas 750. The Atlas became Norton’s front line bike until it was replaced by the 750 Commando in 1968. The 1964 Norton Atlas was the first to receive 12-volt electrics.


1966 Norton Atlas SPECIFICATIONS

Engine type

Displacement

Bore & Stroke

Compression

Spark Plug

Ignition

Carburetor

Engine output

Charging

Battery

Ignition timing

Points gap

Cam Chain

Magneto Chain

Primary Drive

Primary Sprockets

Clutch

Final Drive

Final Sprockets

Gearbox type

Overall Ratios:

1st, Bottom

2nd

3rd

4th, Top

Suspension, front

Suspension, rear

Brake, front

Brake, rear

Tire, front

Tire, rear

Petrol Capacity

Wheelbase

Ground clearance

Seat height

Dry weight

Curb weight

Air-cooled OHV vertical twin

745cc

73mm X 89mm

7.6:1

Champion N6Y

Capacitor

1- Amal Monobloc

49 bhp @ 6,800 rpm

12V Alternator

12 volt

32 degrees BTDC at full advance

0.012

1/2″ X 5/16″ chain X 76 links

 

 

21 teeth X 42 teeth

Multi-plate, wet

5/8″ X 1/4″ chain X 98 links

19 teeth X 43 teeth

4-speed constant-mesh, right foot shift

11.6:1

 

7.57:1

5.52:1

4.53:1

Telescopic fork, hydraulic damping

Swing arm w/2 hydraulic dampers

8″ X 1.25″ SLS drum

7″ X 1.25″ SLS drum

3.25″ X 19″

4.00″ X 18″

2.5 Imp gal

55.5″

6.2″

31.0″

395 lbs

410 lbs