S p e c s: VRD1T

engine: single cylinder, air cooled 2-stroke
barrel: 3 transfer ports
induction: disc valve
bore: 62.4 mm
stroke: 57 mm
cubic capacity: 180.69 cc
compression ratio: 8: 1
bhp at rpm: 10.3 @ 5700
lubrication: 2%
transmission: 4 speed constant mesh
1st gear: 14.47: 1
2nd gear: 9.84: 1
3rd gear: 6.81: 1
4th gear: 5.08: 1
clutch: wet - multiplate
carburetor: Dell'Orto SI 20/20 D
main jet: 109
slow running jet: 50
mixer tube: BE 2
starter jet: 60
ignition: contact breaker & coil
ignition timing: 22 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
wheels: 10"
wheel hubs: cast w/cooling fins
tires: 3.50 x 10
tire pressure (front): 16 psi
tire pressure (rear solo): 20 psi
tire pressure (rear w/passenger): 32 psi
max speed: 62 mph
click for the VRD1T electrical page

This model was made for the Swiss market only and was even given it's own chassis number. The 175cc must have been a reponse to some law, but the rest of the bike appears to be the same as the Italian Rally 180. The motor is stamped VRD1M. Thanks to Enrico Marra from Belgium for the images.