The valves are 5/16"stem in and exh.

Valve guides are phosphor bronze.

Coil valve springs.

Redesigned rocker arm at valve end

Forged piston, compression ratio 10:1 and 12:1

One piece barrel, nikasil plated

Carillo conrod, in a needle big end bearing

Crank - 25mm mainshafts - totally pressed up.

Metric bronze caged main bearings

Redesigned tappets and guides, to solve the problem of the extremely high wear inherant in the original design.

Vernier adjustable cams and needle bearings for cams

Improved cylinder head bolts and studs

 

Different to original is especially the longer conrod and shorter piston.

All sizes and threads are original and most parts are interchangeable with original.

 

500cc engine bore 86 c stroke 85.5, price Euro 5650

600cc engine bore 90 x stroke 92.5, price Euro 5850

This does not include sprockets, carb or ignition.

Prices exclude VAT at 19%.

We have no price list yet.