AA Performance Products. Bolt on cast iron 83mm ‘big bore’ barrel & piston kit that increases engine capacity from 1200cc to 1384cc. No machine work required.
Only for crankcases with 87mm hole, will not fit 90mm crankcase. Always check you crankcase before ordering.
The kit fits 1200cc engines up to 7/1969 with a single oil relief piston up to engine number D0525049.
Will also fit 1200cc engines from 8/1977- from engine number D1430281.
Engines with numbers in between the ones quoted above will have 90mm cylinder holes.
Engine size: 1384cc
Bore: 83mm
Stroke: 64mm
Cylinders: Cast iron
Pistons: Hypereutectic
Upper Ø 90 mm, lower Ø 87 mm
Compression Height: 39.20mm
Kit includes: 4 cylinders, 4 pistons, 1 set of piston rings, 4 wrist pins, and clips.
