Trials Star: 1972 OSSA Mick Andrews Replica

OSSA’s Mick Andrews Replica was built between 1972 and 1978 and weighs just 197 pounds without gasoline.

| March/April 2020


1972 OSSA Mick Andrews Replica

Engine: 244cc single-cylinder 2-stroke, oil mixed in gas, 72mm x 80mm bore and stroke, 19hp @ 6,500rpm
Carburetion: Single Mikuni VM24
Transmission: 5-speed constant mesh, wet multiplate clutch
Electrics/ignition: 6v, Motoplat electronic ignition
Frame/wheelbase: Dual-downtube w/engine as stressed member, 51in (1,295.4mm)
Suspension: Telescopic front, swingarm rear/twin hydraulic shocks
Brakes: 5in (122mm) internal expanding single-leading-shoe front and rear
Ground clearance: 10.5in (266.7mm)
Tires: 2.75 or 3 x 21in front, 4 x 18in rear
Weight (dry): 197lb (89.4kg)
Seat height: 31in (787.4mm)
Fuel capacity: 1.8gal (6.9ltr)
Price then/now: $940/($3,450 Bonhams Jan. 2017) ($5,170 Mecum Jan. 2018)

Most forms of motorcycle competition focus on achieving a high degree of velocity. Not so with the sport of observed motorcycle trials.

In this offroad competition, the main premise is to ride a purpose-built machine as carefully as possible over and around numerous obstacles, all while being scrupulously watched by section officials. It takes a good eye, a steady throttle and clutch hand and a very good sense of balance. In trials, points are added to a rider who “dabs” or “foots” in any given section of the event.


“Like golf, where the least amount of strokes on the course wins, trials are won by the person who touches their foot to the ground the least amount of times over the course of the event,” explains the North American Trials Council website. “The rider with the lowest score wins. Riding a section ‘clean’ without footing is the ultimate goal of all riders (a score of 0).”

Andy Romanoff
3/5/2020 12:04:49 PM

I loved my Ossa, but it had one flaw that came close to killing me, the fiberglass fuel tank. A few years back, I wrote about that bike at Stories I've Been Meaning to Tell You on Medium, and here's what I said: Early seventies, I was riding my dirt bike up a steep incline, almost vertical. At the top of the ride, where momentum runs out, and gravity takes over, you cut the bars hard and return to the bottom, a perfect vertical U-turn. It feels great to do it, a small mastery. I came to the top, threw my weight to the high side, pulled the bars hard left, and started the return to the bottom. In that moment, feeling great, I was slammed sideways, but I have no memory of that because the impact of the motorcycle that hit me knocked me unconscious. I came back to life at the bottom of the hill, dazed, lying under my bike, the motor screaming, the hot exhaust pipe searing my leg, and gasoline from the shattered fiberglass tank leaking all over me. I knew I was one spark away from dying. My left arm looked bent, and I was pinned underneath, but I wriggled out somehow, cut the motor, and stood there shaking. My left hand didn't work, and my jaw was hanging down, but both eyes were ok, and both ears, and not much blood anywhere that I could see. I was conscious; I was alive. Like I say, I loved that bike and still remember it fondly. What a precision tractor! Andy Romanoff

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