84 gpz 750 non turbo head on a 82 kz 750 block?

I am tearing down my KZ 750 to refresh the top end for the track next year (road racing) I plan on useing a wisco 810 kit i have been sitting on and I know the gpz heads flow better, i have a 82 gpz 750. I came across a 84 gpz 750 non turbo head and I went and found the part numbers for the 82 gpz head 11002-5031 and the 84 gpz is 11002-1182, not sure if the head will bolt down and they just changed the cc's or valves? I dont care that I will lose the tach drive, also I have heard the turbo cams help the motor out too, any thoughts? Also i have a set of bs34s laying around that I am pretty sure I will be using, the bike currently has a early yoush pipe and pods, if anyone could give me a starting area for the jets on the bs34s. Any input would be great to either I am wasting my time or to try something else

I know the cams are different on the zx; higher lift and / or duration. The zx750 heads are quite sought after, I have one which will probably go on my 750R1 someday.

Also I read somwhere that a zx turbo head gasket works well on a N/A gpz750.

There was a rumour that the 82 R1 heads were hand ported from the factory, but it might just be urban myth.

Tyrell Corp wrote: There was a rumour that the 82 R1 heads were hand ported from the factory, but it might just be urban myth.

I believe this is true. There were photos in one of the bike mags back in the day, and a statement from Kawasaki clarifying that the port work is done at the factory. This is doubly easy to understand while restoring the head on my '81 750E2 and seeing how crappy the casting and machine work was in the ports. The short side radius had a sharp edge where the port was cut to accept the valve seat, and excess material around the seat in the bowl area. I took a die grinder and smoothed out these sharp edges on my engine with only a minimum of work.

Some before and after photos...

your correct, well at least my head on my 82 gpz has beend smoothed over, but i cant say if it had beed done by someone else, so the 84 head i saw will work correct?

The turbo and N/A head's are the same other then the turbo head has a
a temp. senser.
Turbo cam's are stock KZ650 cam's.
83-84 GPz head is the best 750 head flow wise.

Well just bought the head, do you guys know what a good amount to mill off? I see numbers all over the place, I have read about setting the exhaust cam to 105 and the intake to 109 to make up for the cam cover pushing on the chain.

rssuby2001 wrote: I have read about setting the exhaust cam to 105 and the intake to 109 to make up for the cam cover pushing on the chain.

It don't quite work like that.
You need to make a cutaway valve cover to use when degreeing cam's.
Cam's must be installed like they will be ran with cam chain adjusted correctly.

Ok, so the other way is more like guessing. Thank you for the idea, I appreciate a the info I can get, do you recommend using a manual tension or the factory auto setup?

zukdave wrote:

rssuby2001 wrote: I have read about setting the exhaust cam to 105 and the intake to 109 to make up for the cam cover pushing on the chain.

It don't quite work like that.
You need to make a cutaway valve cover to use when degreeing cam's.
Cam's must be installed like they will be ran with cam chain adjusted correctly.

Please explain further. I don't understand. What's wrong with degreeing the cams with the valve cover off? The cover doesn't affect the cams or cam chain.

Well I just found a cover for 12 so it wont hurt to check I guess, this will be my first non stock build, car or bike

I have a cover you can have for the cost of shipping. I'm about 99% sure you don't need a cut away cover to degree the cams though.

Part 12053 is the chain guide that fit's in the valve cover.
With out it you can't degree the cam's.
www.partzilla.com/parts/search/Kawasaki/...TENSIONER/parts.html