4 valve head swap?

Yeah, that's OK... I posted a bunch of pic's in there because it seems to be easier for me...

I rode that bike on the street for a while with a MTC 13:5:1 831cc kit and a big valve head with GSXR 33mm flatslides - power wheelie in 3rd gear at 100MPH... that's when I knew I had a monster on my hands.

I am currently reusing those old pistons on a street motor I am building, but this one will be much milder... probably shooting for around 75HP instead of 90. Cylinder block and head are stock looking and the only non standard thing on the bike is the VM26 carbs - it will have stock air box and 4 into 2 exhaust. Head flows 72CFM with a Andrews 20 cam... which is matched to the carbs max airflow. Compression has been lowered to about 10.5:1

Can I post A few of that bike?

:laugh:

:laugh:

:huh:

It gets around! I just like it better, my way.

Here's an old picture:

That's a bit much on the pic's... I don't want to high-jack this thread and make it about my bike - then you throw in Noard's bike? (which is a turbo motor!)

I think we should keep the perspective of the 4V head swap experiment and not shift it onto drag bikes or race motors.

If anybody needs to see pic's of my stuff they should go here:

www.cyclemadness.com/cmforum/index.php?topic=507.0

www.cyclemadness.com/cmforum/index.php?topic=550.0

I have been thinking about this all day (at work)

this thread talks about zx900 rods having the same big end as a kz650, and being 4mm longer (depending on what heigth I need they may be useful, maybe not...) and having a 17mm small end.

kzrider.com/index.php?option=com_kunena&...mit=20&limitstart=40

Does anyone know what size the small end on a 1989-90 zx750 is?

It is just hard to get the numbers I need (con-rod length, piston pin sizes

Injected wrote:

That's a bit much on the pic's... I don't want to high-jack this thread and make it about my bike - then you throw in Noard's bike? (which is a turbo motor!)

I think we should keep the perspective of the 4V head swap experiment and not shift it onto drag bikes or race motors.

If anybody needs to see pic's of my stuff they should go here:

www.cyclemadness.com/cmforum/index.php?topic=507.0

www.cyclemadness.com/cmforum/index.php?topic=550.0

If you are using your bike as a referance in this thread, can't we see the referance?

Sorry for any HiJacking!

using the carrillo catalog I have found these bikes have the same big end as a kz650 (1.4963) 38.006mm

kz650 length (4.213in) 107mm

GSX-R1000 '01-04 small end: 16mm length 111mm
GSX-R1000 '01-04 Stroker Small end: 16mm Length 109mm
GSX-R1000, '05-08 Small end: 15mm Length 111mm
GSX-R1000, '05-08 STROKER small end: 15mm length 109mm
GSX-R1000, '09-10 Small end: 15mm length 112mm

I would rather see pics of the ZX head and barrels running on the 650 bottom end...

I don't want anybody to get too distracted with the drag bike - the whole idea of this thread was the 100hp street version of a KZ650... Right?

I just used mine as a reference to show it could be done as a race motor and I did not offer up the pics myself - no harm done, plus the guy who started the thread asked for them anyways...

I would really like to see what dude comes up with.