Honda CRF50F Owner's Manual page 140

Specifications
Fuel & Lubricants
Engine oil API Service
recommendation Classification SG or
higher except oils
labeled as energy
conserving on the
circular API service
label, SAE 10W-30,
JASO T 903
standard MA,
Pro Honda GN4
4-stroke oil (USA &
Canada), or Honda
4-stroke oil
(Canada only), or an
equivalent
motorcycle oil
132
Technical Information
Fuel & Lubricants
Drive chain Pro Honda HP Chain
lubricant Lube or an
equivalent
Capacities
operator only;
Passenger
capacity no passenger
Maximum weight 88 lb (40 kg)
capacity
Cargo capacity none
Engine Specifications
Displacement 3.0 cu-in (49 cm )
Bore & stroke 1.54
(39.0
Compression ratio 10.0 : 1
1.63 in
41.4 mm)