S p e c s: VMB1T

1976 - 1990
engine: single cylinder, air cooled 2-stroke
barrel: 3 transfer ports
induction: disc valve
bore: 55 mm
stroke: 51 mm
cubic capacity: 121.1 cc
compression ratio: 9.25: 1
bhp at rpm: 7 @ 6000
transmission: 4 speed constant mesh
1st gear: 14.74: 1
2nd gear: 9.80: 1
3rd gear: 7.06: 1
4th gear: 5.31: 1
clutch: wet - multiplate
lubrication: 2% (pre-mix)
carburetor: Dell'Orto SHB 19/19
main jet: 76
slow running jet: 45
throttle valve: No 2
starter jet: 60
ignition: electronic
ignition timing: 20 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
wheels:10"
wheel hubs:cast w/cooling fins
tires: 3.00 x 10
max speed: 56 mph
 
click for the VMB1T electrical page

Note: The shift cross (cruciform) on this bike changed in 1978 from a 51mm to 50mm. Be sure to make sure the shop you order from knows what year your bike is.