motor

is the zzr1100 motor the same as the zrx do they share the same parts

Seeing as the ZZR was a 6 speed & the ZRX a 5 speed probably not, what year models are you comparing?

basically the same donk.....but some differences between the 1100 and 1200 versions of each.

A year model would be good - as Rob says.

Lots of parts will interchange - but a few won't. You could fit a ZRX motor into a ZZR1100 frame no probs, but would need a ZZR1100 head. Same thing if you were doing it in reverse - a ZZR1100 motor will slot into a ZRX frame, but you would need a ZRX head.

Gos - out of interest, what is it on the head that is different?

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Gos, what is it on the head that is different?(-8

Have you ever seen the fucker?

Can't say I have - other then partially concealed by a ZRX.

From this thread it appears to 'fit' on a ZZR engine, so it must at least be 'similar' and my question is really why can you not use the the other head - what is it that does not work out?

Just out of interest.

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Gos - out of interest, what is it on the head that is different?

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inlet manifold design. The head changed to a downdraught design with the first ZX10 of 1988. All the intakes were angled up at around 45deg compared to the previous GPz1000RX and GPz900R heads, which had the carbies in the normal horizontal position behind the head.

ZX10 and the subsequent ZZR1100 and 1200 motors all use the head with the angled inlet ports. The ZRX does not - it went back to the earlier design with the carbs horizontal behind the head. Internally, the heads are pretty much the same as far as everything else is concerned....maybe some slight changes in valve sizes and cam profiles over the years...

There was also a GPz1100 in the model range during the mid-90's - this used a horizontal design for the inlet tracts.....but basically the same motor as well.

You can also swap cams around between these motors easily - I think the go is to use ZZR1100 cams in the ZRX motor for some better top-end. But you can't fit a ZZR1100 head to a ZRX motor in a ZRX frame - there is not enough room for the downdraught carbies.

There are blokes in the US who are pulling 150hp out of old 1986 GPz1000RX motors using almost all standard Kawasaki parts....

Gotcha!

Thanks!

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been busy just wanted to know if the transmission cover from zzr1100 is the same as 1999 zrx 1100 as having trouble chasing up cover and if some other models share the same parts

easiest way to check is do a comparison from the Kawasaki Parts House website - just compare part numbers between the 2 covers. My gut feeling is that they will be exactly the same cover.

thanks mate will do