Big Bore Kit (Square Barrel) – BSA B44

Square Barrel Alloy Big Bore Kit
Nicasil Plated Bore C/W 10.5:1 Omega Piston, Head Gasket & Push Rods

Takes your B44 to 500cc (84mm)

Square Barrel for use with standard petrol, contact us for methanol version

All parts Made in England

Part number 41-0787A

*Fitting Instructions for BSA B44 84mm Barrel & Piston Kit
Machine out Crankcase mouth to 3.490"/3.495". The sphere of the cylinder head must be increased in diameter to match the 84mm bore size, this can be done by either placing the head on a lathe faceplate or carefully with hand tools.