Does anyone have the specs for the combustion chamber volume for the XR 1000? It's not in the service supplement, and I'm not sure where else to look.

Hi Beach biker,

It's easy enough to calculate it if you know the CR:

Head volume = Capacity divided by ( CR - 1 )

Roughly, for a 9 to 1 Sporty: 450cc / 9 - 1 = 450 / 8 = 56.25cc

Patrick