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Head difference
Posted: Sat Oct 21, 2017 3:59 pm
Author: RussG
Hi,
I’m rebuild/moding a Z1000A1, I bought a head off Padders which I think he said was off a MkII? It has some extra “clean air”? holes that are exposed when I fit the A1cam cover. Can anyone explain what they do and whether they are supposed to be covered or open?
Cheers Russ
Re: Head difference
Posted: Sat Oct 21, 2017 4:37 pm
Author: Pigford
Just block them off - they're no use.... only fitted to me USA emissions.
Re: Head difference
Posted: Sat Oct 21, 2017 9:23 pm
Author: RussG
Thanks Pig.
Re: Head difference
Posted: Sat Oct 21, 2017 11:12 pm
Author: Z1parR
Just tap them and plug with Loctited grub screws , works fine for me
Re: Head difference
Posted: Sun Oct 22, 2017 6:15 am
Author: kev edwards
Or use cover with tabs to cover the holes.
Re: Head difference
Posted: Sun Oct 22, 2017 9:36 am
Author: ianali
I'm confused again. My bike has a mk11 engine, cam cover has little top things that look like they should connect to something that should run up the outside of cylinders. There is nothing though that runs up,the cylinders. Not had cover off yet so no idea what's in there.
Ian.
Re: Head difference
Posted: Sun Oct 22, 2017 6:51 pm
Author: kev edwards
ianali wrote:I'm confused again. My bike has a mk11 engine, cam cover has little top things that look like they should connect to something that should run up the outside of cylinders. There is nothing though that runs up,the cylinders. Not had cover off yet so no idea what's in there.
Ian.
You probably have a non emissions cover for the US market.
Re: Head difference
Posted: Sat Oct 28, 2017 4:26 pm
Author: Philippe
Hi ianali
in the US in the early eighties of the previous century they worried about emission.
Kawasaki came up with the idea to add fresh air to the exhaust gasses in order to get them cleaner and to be able to meet the US regulations so they could continue selling bikes in the US.
There was a tube coming with a valve connected to it from the air filter body that split into two tubes, these went to each side of the camshaft cover.
In the camshaft cover there was a membrane that opened due to underpressure when the exhaust gasses left the engine. The air was sucked through the holes in the cilinderhead and came out near the exhaust valves thus enabling clean air to be mixed with the exhaust gasses and causing some sort of "afterburner" .
This device was not required for the other markets.
So you have a US cilinderhead and camshaft cover for an MK2 or an ST (similar cilinderheads)
Plug the holes in a descent way and you'll be able to ride your bike.
Good luck !!!
Greetings from Belgium
Philippe