BIG BORE KIT (SQUARE BARREL) – BSA B50/TRIUMPH TR5MX

Square Barrel Type, Nicasil Plated Bore
C/W 12:1 Piston to suit Methanol, (20mm Dia Gudgeon Pin),
Copper Head Gasket

Takes your B50 to 600cc (92mm)

NEB AFTERMARKET BIG BORE KIT TO RUN WITH METHANOL.

BARREL 0.060" SHORTER THAN A PETROL VERSION, GIVING A 12.5:1 COMPRESSION

MODS REQUIRED BORE OUT CRANKCASES & CYLINDER HEAD TO INCREASED 92MM DIAMETER. BIG VALVES AND INLET TRACK WITH 36MM CARB

All parts Made in England

SUITABLE FOR

BSA B50 1971-73

TRIUMPH TR5MX 1974

PART NUMBER 71-1219D