These are the known mechanical and performance specifications for your 1954 Velocette Mac .
Displacement349.00 ccm (21.30 cubic inches)
Bore/Stroke68.0 x 96.0 mm (2.7 x 3.8 inches)
Fuel Economy & Polution
Seat Height700 mm (27.6 inches) If adjustable, lowest setting.
Alt. Seat Height
Wheelbase1,276 mm (50.2 inches)
Dry Weight161.0 kg (354.9 pounds)
Wheels & Brakes
Front BrakesExpanding brake (drum brake)
Front Brake Diameter178 mm (7.0 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter152 mm (6.0 inches)
It appears you're interested in specifications for the Velocette Mac . This Allround model is powered by a Twin, four-stroke engine with 349.00 ccm (21.30 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor allowing this machine to produce its 18.00 HP (13.1 kW) horsepower and torque. According to our records engine heat of the Velocette Mac is moderated by Air. You'll need to get familiar with the 4-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 3.25-19 and the rear is 3.50-19 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Expanding brake (drum brake) front brakes and Expanding brake (drum brake) rear brakes. The Velocette Mac was launched in 1954, and we're happy to know (or assume) you've got one in your garage. To help you keep your ride in tip-top shape, consider purchasing an owner or service manual.