GPZ750 turbo head + KZ750E + which cams?

Hi guys,

I can get a GPZ turbo head fairly cheap for my KZ750 motor.

Is the turbo head an upgrade or is it only the regular GPZ head? Better flow? Bigger valves?
Also, I believe the turbo cams are worse than the stock KZ cams? Is that correct?

Any modifications needed to fit head? I've also read somewhere it has a bigger combustion chamber so I'll effectively be lowering the CR by doing this. Still worth it? I'll be running a 810cc kit.

I thought the Turbo had a lower compression ratio than the ordinary bike.

G-tron wrote: ... Also, I believe the turbo cams are worse than the stock KZ cams? Is that correct? ....

From the parts diagrams at Kawasaki.com or Partzilla the 750 Turbo has the same camshafts as the KZ650. I don't know what else is different from the 750E, if anything. The Turbo has the same valves as a number of the 750-4 models.

stick with the kz 750 head or gpz 750 head . use gpz 750 cams if your going with the 810 kit .

Can anyone post combustion chamber comparative pictures of the '83 (late) GPz750 head and the standard 82 and older 750? I never knew they were that different, but now hear one is a "bathtub" like the late 1100....

Never mind - found some...interesting, too....

Turbo head is a down grade from KZ750 head Gpz 750 head is what you are looking for.83-85

Kray-Z wrote: Never mind - found some...interesting, too....

Pics?
Steve

Thanks guys,

glad I checked in on the forum before buying. Will stick with my KZ setup until I find n/a GPZ cams.

Is porting/flowing the stock head worth the trouble at all?

One thing to realize is that the later heads got rid of the mechanical tach drive.

Best I know is the N/A and turbo head isthe same casting they have diff. part number's because the turbo
head is drilled and taped for a temp senser. Both my N/A head's have the boss it's just not drilled.