Valve sizes!

I need the sizes of all KZ and GPZ engines if any one has them. I have a junk yard to pick thur for parts and just need info.

www.flowbenchtech.com/porting/CRH/kz-data.htm

engine valve size int exhaust bucket
903 36 30 sob
1015 36 30 sob
998 37 32 sob
gpz1100 38 32.5
650 sub
700 sub
750
gpz750
turbo750
550
gpz550

thanks for the web site. I am looking for height, bucket type and size for all the engines.

Vorbeck wrote:

engine valve size int exhaust bucket
903 36 30 sob
1015 36 30 sob
998 37 32 sob
gpz1100 38 32.5
650 sub
700 sub
750
gpz750
turbo750
550
gpz550

thanks for the web site. I am looking for height, bucket type and size for all the engines.

J motor valves are .050" shorter in stem length than KZ 900/1000 valves. Works to your advantage when installing OS valves in KZ heads. I'd much rather have 37mm J valve than 37.5 OS KZ valve to work with.

In the 900 - 1100 motors, only the 83-85 GPz11 had shim on bottom buckets & retainers.

All 650 & 750 4 cylinder engines are S.O.B.

Of all the S.O.B. motors the OEM GPz11 retainers will give you more spring free travel than the 650 retainers will. Roughly .100" more.

You can also use GS1000 38mm Suzuki Intake valves. Also .050" shorter than standard KZ.

1.475" is target installed height for the large motors. On 750 motors you have to watch the dam service manual because it's not accurate for all 750 motors. They played with cam base circles. Watch the exhaust cams side especially.

What else do you need?

Larry- Where is a good place to find off the shelf stainless 37mm J valves? KPMI does not carry them, they only carry 38.5mm J model valves. Thanks for a source reference Larry

porchev914 wrote:

Larry- Where is a good place to find off the shelf stainless 37mm J valves? KPMI does not carry them, they only carry 38.5mm J model valves. Thanks for a source reference Larry

Jeff at Z1 should be able to hook you up with after market steel replacements and I have a source for stainless J valves.

Larry

All of the 550's are shim under buckets like the 650's and 750-4's.

larrycavan wrote:

porchev914 wrote:

Larry- Where is a good place to find off the shelf stainless 37mm J valves? KPMI does not carry them, they only carry 38.5mm J model valves. Thanks for a source reference Larry

Jeff at Z1 should be able to hook you up with after market steel replacements and I have a source for stainless J valves.

Larry

That's what I was asking for Larry, your source for stainless J valves....unless it's a closely guarded secret :ohmy: I can get the exhaust from KPMI, but I can't find the intakes anywhere off the shelf.

Thanks every one! good info. I am picking bikes apart now. I just got a gpz750 home that I plan to pull the head off and see if the valves will fit a 1015 head. i am also listing the gs engines I run across also to get different parts.

Vorbeck wrote:

Thanks every one! good info. I am picking bikes apart now. I just got a gpz750 home that I plan to pull the head off and see if the valves will fit a 1015 head. i am also listing the gs engines I run across also to get different parts.

They won't

We can usually make 37 mm J stainless from 38.6 and ship them the same day.

kzzone.com/valves.html