Cylinder head compatibility
 

Are the heads on a 996 the same as on a 916?

Doubt it I would expect the 996 to have bigger valves and a wider stud spacing

I'll measure the studs up tomorrow, can anyone with a 916 head do the same?

From http://www.bikeboy.org/duccapacities.html


Some notes for component swapping – not an absolute list by any means.

The cylinder stud spacing variations are:
‘Small blocks’ (small 2v),
‘Large blocks’ (900/906/907, ST2 and 748/851/888/916),
‘996’ (996, ST4S, S4R, 998/999/1000ds/ST3)’
‘Large Testastretta’ (104mm bore 998R/999R, 1098, 1198).

Swapping cylinders between the different variations is not possible. Well, not easily. The holes in the cases for the cylinder spigots to go into also vary.

Ahhh, cheers ok then.