Cylinder Head

[amdshaner]

is the cylinder head from an NA motor the same as one on a turbo motor? I have a NA motor as well so if I have any problems with the cylinder head can I just swap them?

Shane

[kawasakiman542]

You can use it but you will have to drill and tap he engine temp sensor and use the turbo cams. The combustion chamber is shaped a little different , but is ok to use.

[DEATH_INC.]

The combustion chamber is shaped a little different , but is ok to use.

Are you sure about that? (genuine question, not winding you up) I can't see any difference between the turbo and n/a chambers in the heads i have...

[750steve]

I'm pretty certain the N/A head has about 1.5ml more room in the chamber, the Turbo is closer to a late 650 chamber volume, i'll see if i can dig the figures out

[kawasakiman542]

The combustion chamber is shaped a little different , but is ok to use.

Are you sure about that? (genuine question, not winding you up) I can't see any difference between the turbo and n/a chambers in the heads i have...

Death, I think we went through this before.... the turbo head has a half round chamber, the na head has a half round chamber with an extra chamfer around it to accommodate the dome of the na piston.

[750steve]

Here ya go;

Here are some #s I have found on the volume of the combustion chambers on the 650s and 750s

650 head volume #s are
77-80 23.7
81 23.3 to 24.1 or average of 23.7 same as early one
82 24.8

750H 24.8 +-0.4cc
750L 25.3
Gpz750 25.9
Turbo 24.6

[amdshaner]

Ok cool, thanks everyone.. This is an 'H' model so it will be very close.. Drilling for the sensor will be easy. Thanks again for the info..

Shane

[tack1000]

You may have an issue with the valve clearance, as the turbo cams have a different base circle than an NA set of cams. It can be done with a little work, as I've used a NA head as I wrecked all the Turbo ones I had when I was racing them.

[Theo CH]

In the cleaned and marked areas the NA combustion chamber is wider than the turbo chamber:

If you use an NA Head with turbo pistons you have no squish. I think this is not good.

Theo

[TurboD]

What are the valve sizes on the Turbo head and are they the same as the NA heads?

[750steve]

Yeah, i believe they are from memory (looked up part #'s a while ago)

Think is i think the 750H head has smaller valves on 1 side & the 650 definatley has smaller valves

[TurboD]

Thanks. Does anyone know the actual valve sizes?

Also I know this may be a strech, but would anyone happen to have or know flow numbers for a stock turbo head?

Thanks D

[DEATH_INC.]

In the cleaned and marked areas the NA combustion chamber is wider than the turbo chamber:

chamber 1.jpg

If you use an NA Head with turbo pistons you have no squish. I think this is not good.

Theo

Yes, i see that now that I look again (and you've pointed it out), but this is only on the 'A' head that I have, the earlier N/A one and the turbo one's I have don't have these.

[DEATH_INC.]

Yeah, i believe they are from memory (looked up part #'s a while ago)

Think is i think the 750H head has smaller valves on 1 side & the 650 definatley has smaller valves

From what i can find, exhausts are the same for;

KZ650-H1 CSR (1981)
KZ650-H2 CSR (1982)
KZ650-H3 CSR (1983)
KZ700-A1 (1984)
KZ750-E1 (1980)
KZ750-E2 (1981)
KZ750-E3 (1982)
KZ750-F1 LTD Shaft (1983)
KZ750-H1 LTD (1980)
KZ750-H2 LTD (1981)
KZ750-H3 LTD (1982)
KZ750-H4 LTD (1983)
KZ750-L3 (1983)
KZ750-N1 Spectre (1982)
KZ750-N2 Spectre (1983)
KZ750-R1 GPz (1982)
ZN700-A1 LTD Shaft (1984)
ZN700-A2 LTD Shaft (1985)
ZR750-C1 Zephyr 750 (1991)
ZR750-C2 Zephyr 750 (1992)
ZR750-C3 Zephyr 750 (1993)
ZX750-A1 GPz 750 (1983)
ZX750-A2 GPz 750 (1984)
ZX750-A3 GPz 750 (1985)
ZX750-E1 GPz 750 Turbo (1984)
ZX750-E2 GPz 750 Turbo (1985)

and intakes for;


KZ650-H1 CSR (1981)
KZ650-H2 CSR (1982)
KZ650-H3 CSR (1983)
KZ700-A1 (1984)
KZ750-E1 (1980)
KZ750-E2 (1981)
KZ750-E3 (1982)
KZ750-F1 LTD Shaft (1983)
KZ750-H1 LTD (1980)
KZ750-H2 LTD (1981)
KZ750-H3 LTD (1982)
KZ750-H4 LTD (1983)
KZ750-L3 (1983)
KZ750-N1 Spectre (1982)
KZ750-N2 Spectre (1983)
KZ750-R1 GPz (1982)
ZN700-A1 LTD Shaft (1984)
ZN700-A2 LTD Shaft (1985)
ZR750-C1 Zephyr 750 (1991)
ZR750-C2 Zephyr 750 (1992)
ZR750-C3 Zephyr 750 (1993)
ZX750-A1 GPz 750 (1983)
ZX750-A2 GPz 750 (1984)
ZX750-A3 GPz 750 (1985)
ZX750-E1 GPz 750 Turbo (1984)
ZX750-E2 GPz 750 Turbo (1985)

This is just from the part #'s tho, i don't have a 650 head here...

[amdshaner]

Thanks for that Death Inc.. That charts helps a lot..

Shane