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1966 Triumph Mountain Cub

1966 Triumph Mountain Cub

The 200cc T20 Tiger Cub was produced from 1956 through 1968 and sold quite well for Triumph. The original Cub was introduced in 1953 at the Earls Court Motorcycle Show in London England as a 150cc commuter, at a time when there was a very big market for commuters. However, the Cub was designed specifically, and cleverly, to fill a very specific part of that growing market. England was about to pass the “Learner Law” requiring all motorcycle riders under the age of 18 could not ride anything larger than a 250. This created a boom in the bottom of the market. Parent-company BSA had their own 125 Bantam 2-stroke, and the C25 250 4-stroke single. So, Triumph launched the Tiger Cub as a 150, sort of splitting the difference.

They also made it smaller, sort of a scaled-down Bonneville. And that wasn’t by accident. Legendary Triumph designer and stylist Edward Turner personally designed and styled the Tiger Cub, and it shows. This was a big part of the appeal that helped to make the Tiger Cub such a hit, certainly in the UK home market. Not so much in the US, who had no such learner law. But they still made it across the pond, and sold reasonably well in the US, where there were street versions that looked like miniature Bonnevilles, commuters that resembled Triumph’s ‘Bathtub Bikes’, and semi-off road versions that looked like a TR6. The good looks helped a lot, but their reduced size either helped or hindered sales. Being smaller, with one of the lowest seat heights on the market, they appealed to the younger riders the Triumph Tiger Cub was designed for. But, they held less appeal for full-sized, and/or more experienced riders. There’s no disputing that the Tiger Cub is a great-looking machine.

1966 Triumph Mountain Cub SPECIFICATIONS

Model designation
Engine type
Bore & Stroke
Compression ratio
Fuel system
Engine output
Primary drive
Final drive
Suspension, front
Suspension, rear
Brake, front
Brake, rear
Wheel/Tire size, front
Wheel/Tire size, rear
Fuel capacity
Curb weight
Top speed
1963 Triumph Tiger Cub
Air-cooled OHV single
60 mph / 96 km/h
199cc / 12.1 ci
63mm X 64mm
Amal Monobloc carburetor
14 hp @ 6300 rpm
Multi-plate, wet
4-speed, right-foot shifting
Telescopic forks w/hydraulic damping
Swing arms w/2 dampers (shocks)
5.5-inch SLS drum
5.5-inch SLS drum
3.00 X 17
3.00 X 17
1245 mm / 49.0″
3.6 US gal / 3.0 Imp gal / 13.6L
250 lbs / 113 kg