Below you will find detailed engine spectifications for Victa engines
Bore:
- 125cc – 53.975mm (2.125″)
- 160cc – 61.493mm (2.421″)
Stoke
- 53.975mm (2.125″)
Piston taper:
Bottom of Skirt
- 125cc – 53.848mm (2.120″)
- 160cc – 61.366mm (2.416″)
Top ring land
- 125cc – 53.721mm (2.115″)
- 160cc – 61.239mm (2.411″)
Piston rings:
Number
- 2
Size
- 125cc – 2.381mm x 53.975mm (0.093″ x 2.125″)
- 160cc – 2.381mm x 61.493mm (0.093″ x 2.421″)
Big end bearing type:
- Early models – 15 steel rollers
- Late models – Caged roller bearing
Little end type:
125cc
- Bronze bush
160cc
- Early models – Bronze bush
- Late models – Needle roller bearing
Connecting rod material
- Hardened alloy steel
Crankpin material
- Hardened alloy steel
Crankshaft type
- Alloy steel forgings
- 15 deg taper on drive end
- 0.5 in B.S.F thread both ends
Crankshaft main bearings:
Type
- Ball bearing
Size
- Magnet side – 20mm
- Drive side (early models) – 20mm inner 17mm outer
- Drive side (late models) – 20mm inner 20mm L.D. outer
Crankcase oil seals:
- Drive side (early models) – 17mm
- Timing side (early models) – 20mm
- Both side (late models) – 20mm
Ignition timing
- 3mm (1/8″) btdc
Breaker point gap
- 0.50mm (0.020″)
Spark plug gap
- 0.635mm (0.025″)
Spark plug type
- Champion CJ8 or equivalent
Fuel requirement
- 2 stroke petrol-oil mixture (25:1)