Moto Morini 500 Sport




Make Model

Moto Morini 500 Sport


1984 - 86


Four stroke, 72° V Twin, belt driven single cam operating pushrod 2 valve per cylinder


478 cc / 29.1 cu-in
Bore x Stroke 69 x 64.2 mm
Cooling System Air cooled
Compression Ratio 11.2:1


2x 26mm Dell'Orto carburetors


Starting Kick

Max Power

46 hp / 34.3 kW @ 7500 rpm

Max Torque

45 hp / 33.3 lb-ft @ 5100 rpm


5 Speed 
Final Drive Chain

Front Suspension

35mm Marzocchi forks, 140mm wheel travel.

Rear Suspension

Marzocchi shocks, 63.5mm wheel travel

Front Brakes

2x 260mm discs

Rear Brakes

Single 260mm disc

Front Tyre


Rear Tyre


Dry Weight

167 kg / 368 lbs

Wet Weight

184 kg / 405.7 lbs

Fuel Capacity 

16 Litres / 4.2 US gal 

Standing ¼ Mile  

15.3 sec / 83 mph

Moto Morini 500 Sport AKA Moto Morini 3 ½. Moto Morini 3 ½ was well known for it’s handling but it was low on power. Later Moto Morini released a larger version of the bike, the Moto Morini 500 Sport. This Moto Morini 500 Sport is handsome and unique, an Italian classic that is as rare as hens teeth.

Throughout history Morini engines have been known for churning out lots of torque while delivering extraordinary fuel economy. Like the 350cc engine, the Morini 500 is a 72-degree tandem v-twin. The engine featured Heron heads, which were milled flat and the combustion chamber is recessed in the piston crown, aiding combustion and returning excellent fuel economy. The engine also incorporated one-piece forged steel crankshaft, ball main bearings (first series motors), plain big end bearings (second series motors), and the conrods run on a common pin, desaxe, and offsetting the rear cylinder to the front by 50 mm (2.0 in). Front and rear barrels and heads are interchangeable.

The 72 degree v-twin was connected to the six speed transmission with a six-plate dry clutch, making a characteristic rattle similar to Ducatis when disengaged. Secondary drive was by a 5/8 x 3/8-inch chain to a rear sprocket with cush drive. Gear change is by the right foot and the rear brake is operated by the left foot.

The frame is a full steel duplex swingarm design, with Ceriani rear suspension, and Marzocchi front forks. Morini 500 also featured Grimeca disc brakes.