JP Performance products for BSA Motorcycle C11, C11G, C12 engines

Select a model below

C11, C11G, C12

JP0474

BSA Motorcycle C11, C11G, C12
250cc, OHV 1939-58

Metric Bore
.0mm
Imp Bore
2.4803"
Head Shape
4P +0.126" (+3.2mm)
Clips
WC
Cylinders
1
Crown
Dome
Comp Height
1.1875" (30.2mm)
Length Inches
2.500" (63.5mm)
D.B.B
1.024" (26.0mm)
Ring Comp
2x1/16"
Rings Oil
1x1/8"
OC
P
Pin OD
0.6250" (15.88mm)
Pin Type
P