heads

[paulmceleney]

How can i tell the difference between kz 1000 mk2 head and a z1000 a1 a2 head. I know the cam covers are different, are the valves bigger in the mk 2 head, also what sort of performance you would gain by fitting a mk2 head to a z1000 a1 if any. Ive look at a z1000 head that is fitted to a bike i have and compared to what i believe to be a mk 2 head but they look the same to me i brought this a long time ago and the person i brought it of said it was from a mk2 but iam not sure

[paulmceleney]

can anyone tell me what size the valves are on a mk 2 head are also what size are z1000 a1 valves are thanks paul

[PJ]

Hi Paul,

Check out Z1 Enterprises website, that will tell you all the info on valves

http://www.z1enterprises.com/catalog.as ... 1-1977-EN0

Cheers

PJ

[Rich]

Mk2 have emission burning castings going to the exhaust valves from the cambox face. For USA models these are drilled through, UK undrilled.

[paulmceleney]

just measured the valves, and looked on z1 enteprises mk2 z1000 z900 all the valves are the same size 30mm and 36mm so no diffrence between z1000 z900, just had a close look at the head that i beileve to be mk 2 head is a smooth finnish inside the head where the cams are located and looking at z1000 head of z1r that i have, there is ridge lines where the cam are located so the one with the smooth finnish is off a mk 2 is this correct thanks paul