Moto RUMI Competition SS52

RUMI Competition SS52

  • Displacement: 124.68 cm3
  • Two-stroke engine with two horizontal cylinders side by side
  • Bore and stroke 42×45 mm, compression ratio 10.8:1
  • Max speed 8200 rpm, max power 9 HP
  • Cylinders in special cast iron and then in aluminium, separate, heads in aluminium
  • Carburettor n° 2 Dell’Orto SS 23c/ SS 22c, separate bowl
  • Flywheel magneto ignition with two breakers, two firings per revolution, 6 V, 30 W; in Marelli ST261-DAS-D external magnet variant
  • Clutch with multiple discs in oil bath
  • Four-speed block gearbox always engaged
  • Variable rapporti
  • Primary transmission by gears, secondary by chain
  • Open cradle frame in special light tubes; wheelbase 1265mm
  • Fork front suspension with oscillating rods, wheel pushed
  • Guided wheel rear suspension with antagonist springs; 2nd series: swingarm
  • 36-spoke wheels with aluminum rims: 18″ front, 17″ rear
    2.00 x 18” front ribbed, and 2.50 x 17” treaded rear
  • Central expansion front brake with double shoe,
  • double Ø 170 tie-rod
    Ø 170 central expansion rear brake
  • Electrical system with Nassetti flywheel-magnet, optional headlight on request for road model
  • Instrumentation built-in tachometer in the tank scale 1-10.000
  • Suede racing seat guide trim
  • 22 liter aluminum tank
  • Dry weight 1st series with cast iron cylinders without external magnet 83 kg
  • Maximum speed according to the versions from 128 to 136 km/h
  • Variable average consumption depending on the trim levels
  • List price 470,000 lire
  • Color range: black with red tank