How much do the parts weigh?

contributed by Ian Simpson

I weighed some of them...

Block 26kg (57lbs)
Sump 2.3kg (5lbs)
Oil pump 1.1kg (2.5lbs)
Crank 10.5kg (23lbs)
Flywheel 6.55kg down to 3.66kg (14.4lbs down to 8lbs)
Clutch 3.2 to 3.6kg (7 or 8lbs)

piston+rings+con ron+big end bearings+big end nuts comes to (std piston from factory)
1052.6 grams

Tailgate 8.4kg (18.5lbs)

A lightened Flywheel thread

A lightened Cranksahft thread

A lightened both thread

Ian S RTOC Profile

A slotted 'Ultra' light flywheel



An 'Ultra' light slotted flywheel



Crankshaft with flat planed and radiused lobes