ZXR750 and ZX7R

[the kid]

Can some techo historian explain the differences between the ZXR750 and zx7r . And was there a factory turbo thrown in there as well ? Do like the look of these beasties but don't know the changes and relative merits of these bikes .
One other detail , do they run without the induction pipes and box in place , any way of changing that stuff around ?
Thinking project "Rat ZX7" Just thinking

[mfzx6r]

There aint a lot of difference between the L1-3 , '93-95 and the the zx7r.
The zx7r was just the next Gen of the zxr750.
The zxr's had 1 air inlet,'93-on, and round lights .
They both have "USD" forks and Imo not alot different to ride.
No turbo on any stock zxr/zx7r.
pre '93 had no air ram as such


mario

[Smitty]

There aint a lot of difference between the L1-3 , '93-95 and the the zx7r.
The zx7r was just the next Gen of the zxr750.
The zxr's had 1 air inlet,'93-on, and round lights .
They both have "USD" forks and Imo not alot different to ride.
No turbo on any stock zxr/zx7r.
pre '93 had no air ram as such

mario

oooooh
history lesson (think we have dun this b4)
the GPx750r was the start of that family (F1 F2 and F3 models)
Kwaka took the GPx engine (and some other bits) into a new frame
and stuff and called it the ZXR750 (H1 started the series)
and that continued until they changed the engine (internals bore&stroke)
and it continued on as ZX7r

the rest of the details as per Marios post above
that just about covers the '750' lineage
the only other comment is that the bikes got heavier
on each model change..the last ZX7r is a bit portly
but a great handling sportsbike (better than its rivals at the time)

btw...
the last factory Turbo was a GPz750..from 'bout 1984
(I had one and it was a shocker )


hth

cheers

[HemiDuty]

I was looking for a ZXR750 before I got my ZX7R. I like the 7R more, but I would be damn happy with a ZXR. As long as it is a 750 ya can't go wrong. But I would definitely aim for the USD forks.

[NovaCoder]

oooooh
history lesson (think we have dun this b4)
the GPx750r was the start of that family (F1 F2 and F3 models)
Kwaka took the GPx engine (and some other bits) into a new frame
and stuff and called it the ZXR750 (H1 started the series)
and that continued until they changed the engine (internals bore&stroke)
and it continued on as ZX7r

the rest of the details as per Marios post above
that just about covers the '750' lineage
the only other comment is that the bikes got heavier
on each model change..the last ZX7r is a bit portly
but a great handling sportsbike (better than its rivals at the time)

btw...
the last factory Turbo was a GPz750..from 'bout 1984
(I had one and it was a shocker )


hth

cheers

But wasn't the GPx750 also based on the GPZ750 which was itself a down-sleeved GPZ900

And wasn't the GPZ900 the first ever motorcycle?

[greenmeanie]

http://homepage.ntlworld.com/webzxr/zxr750r/index.html

[Smitty]

But wasn't the GPx750 also based on the GPZ750 which was itself a down-sleeved GPZ900

And wasn't the GPZ900 the first ever motorcycle?

Nova
the GPz7fiddy was a shrunk 900 ( I say that from memory)
but
the GPx engine was all new
it is water cooled (and also had an engine oil cooler)
the Gpz engine is not (air cooled)
the Gpz specs are-
Displacement: 738 cc.
Bore X Stroke: 66 mm. X 54 mm.
Compression Ratio: 9.5:1
Max. output: 80 h.p. @ 9,500 rpm. (59.7 KW.)
Max. Torque: 48.5 ft-lbs.@7,500 rpm. (6.7 kg-m)
Carburetors: Mikuni BS34 (4 of)

the GPx is-
Displacement: 748 cc.
Bore X Stroke: 68 mm. X 51.5 mm.
Compression Ratio: 11.5:1
Max. output: 108 h.p. @ 11,500 rpm. (79 KW)
Max. Torque: 8.7 kg-m @ 8500rpm
Carburetors: semi-flat slide Keihin 34mm (4 of)

as you can see, a totally different engine

oh
and NO, the GPz900 was not the first bike

my '69 model MachIII was

hth


cheers

[the kid]

Thanks Guys for the input . That 750 link is a beauty . Theres a lotta luv out there for the 7



But not as much as for the 9 . "Gotta love the 9"

[Strika]

[ ( I say that from memory)
but
the GPx engine was all new
it is water cooled (and also had an engine oil cooler)
the Gpz engine is not (air cooled)

cheers

Actually Just to split hairs, there were two versions of the GPz 750r produced and sold here in OZ. The first was of course the air cooled model, then we also had a later water cooled GPz750.

[Smitty]

...
Actually Just to split hairs, there were two versions of the GPz 750r produced and sold here in OZ. The first was of course the air cooled model, then we also had a later water cooled GPz750.

we did?

the original GPz I had was aircooled
and the turbo copped an oil cooler (still aircooled)
but I don't seem to remember a water cooled GPz750 engine
mind you that was 20 years ago

cheers

[Strika]

they did for sure. I seen, touched, ridden, worked on two or three
It was leter in the model run.

And FYI- ZXr750 L3 and ZX7R P1, are two entirely different bikes in almost every way. Frame, swingarm, forks, Linkage, shock, motor, gearbox, brakes, handling, ride are all worlds apart.

[Phil]

they did for sure. I seen, touched, ridden, worked on two or three
It was leter in the model run.

And FYI- ZXr750 L3 and ZX7R P1, are two entirely different bikes in almost every way. Frame, swingarm, forks, Linkage, shock, motor, gearbox, brakes, handling, ride are all worlds apart.

and seeing as were being picky there were a couple of bore/stroke changes (as well as frames etc) from the H model to the 96 zx7r (zxr's were called zx7's in the us of a )