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Zxr 750 to zx9r

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Coxyzxr
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PostPosted: 10:19 - 18 Jun 2009    Post subject: Zxr 750 to zx9r Reply with quote

How do you think a 2000+ ZX9R would handle compared to a ZXR750?

Been pondering a later zx9r for months now and finally getting most of my bad debt history cleared up. (Young, stupid Rolling Eyes )
I'm worried going from the smaller zxr750 I may lose the agility and beautiful roll in cornering I get with my zxr?

having said that the 9r is a more modern machine and one would hope chassis and suspension design has come on quite a bit since my zxr days (as good as they were).
Tbh I may just upgrade to a ZX7r but I really like the ZXr's profile and "attack mode" riding position and I honestly believe the older zxr is a better bike than the zx7r.
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Whosthedaddy
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PostPosted: 10:23 - 18 Jun 2009    Post subject: Reply with quote

I loved my ZXR.

I loved my ZX7R.

That is all.

Laughing

For some reason the 9R just doesn't do it or me for some reason and would have another 7R in a heart beat or even another ZXR if they were a little more reliable in their old age.
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Coxyzxr
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PostPosted: 10:26 - 18 Jun 2009    Post subject: Reply with quote

Whosthedaddy wrote:
I loved my ZXR.

I loved my ZX7R.

That is all.

Laughing

For some reason the 9R just doesn't do it or me for some reason and would have another 7R in a heart beat or even another ZXR if they were a little more reliable in their old age.


Which did you like more the zxr or 7r?
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Barry_M2
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PostPosted: 10:43 - 18 Jun 2009    Post subject: Reply with quote

Go for the best of both worlds and put a 9R motor in the 7. Wink Thumbs Up

I'm not sure on the ZX9 handling, but it was built as sports tourer.
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Coxyzxr
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PostPosted: 10:45 - 18 Jun 2009    Post subject: Reply with quote

Barry_MC21 wrote:
Go for the best of both worlds and put a 9R motor in the 7. Wink Thumbs Up

I'm not sure on the ZX9 handling, but it was built as sports tourer.


The early ones sure but thought the new ones kind out did the fireblade revisions in terms of spec/performance?

Yeah with the 9r conversion I have to do the whole package as my spare zxr parts would all need refreshing also so it probably would be more viable to go with a whole new machine in a couple of months.
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Dr. DaveJPS
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PostPosted: 10:54 - 18 Jun 2009    Post subject: Reply with quote

the 9R engine fits the zx7r frame rather than the zxr7 frame (as far as i know)
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Mr Nice Guy
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PostPosted: 11:06 - 18 Jun 2009    Post subject: Reply with quote

DaveJPS wrote:
the 9R engine fits the zx7r frame rather than the zxr7 frame (as far as i know)



9R engine fits the ZXR frame, as I helped my mate do the conversion. What a bike the resulting mishmash was Thumbs Up

He has sold it and is now looking for a ZX9 E model.
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Kris
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PostPosted: 11:08 - 18 Jun 2009    Post subject: Reply with quote

I count myself pretty lucky to have owned perhaps the best of both models, an original ZXR750 H1 and a ZX9R E1.

I actually loved both. With my practical head on I'd have another ZX9. My heart says get the ZXR750...

I'd say the biggest differences are rider comfort and top end power. ZX9 trumps the ZX here every day.
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r0b
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PostPosted: 11:13 - 18 Jun 2009    Post subject: Reply with quote

The zx9r c/e/f was never built as a sports tourer !!!

Iv ridden all the bikes mentioned back to back. zxr750, zx7r and zx9r c/e.

The riding position on the zx9r feels more sit in, than sit on top as it is with the zxr750, well thats how it feels to me anyway.

the front end feels much more planet and heavy on the 750s, not to say what they corner better they just give a more dug in feel I think.

The motor is miles and miles stronger on the zx9 id rather have a zx9 than a zx7 or zxr7 any day, Im not just saying that because I have a 9, my brother has a zxr750h1 and it doesnt compare.

ppl talking about the motor swap im fairly sure its the early zx9 engine ( b model ) that goes in the zxr750 chassis the late engines are different and dont fit.
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Mr Nice Guy
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PostPosted: 11:20 - 18 Jun 2009    Post subject: Reply with quote

Yep, it is the B model 9R engine that fits.

We had it in his L1 ZXR.
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Coxyzxr
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PostPosted: 12:21 - 18 Jun 2009    Post subject: Reply with quote

Mr Nice Guy wrote:
Yep, it is the B model 9R engine that fits.

We had it in his L1 ZXR.


I'm interested to hear more on what the resulting bike was like?
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Barry_M2
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PostPosted: 12:27 - 18 Jun 2009    Post subject: Reply with quote

DaveJPS wrote:
the 9R engine fits the zx7r frame rather than the zxr7 frame (as far as i know)


The 9R (91-95 B model) engine will fit in the J K L M N & P chassis. It is easier to fit in the ZXR chassis than it is the ZX7R in fact! Thumbs Up
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Mr Nice Guy
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PostPosted: 12:45 - 18 Jun 2009    Post subject: Reply with quote

Torquey as fook compared to the 750, certainly a faster bike for sure... I've never been in the pilot seat of a ZX9 so I don't know how it compares to the actual bike, but compared to the 750 - for road use, everyone should do it!

It has torque everywhere, I'm told a "harder top end" and it was much more friendly on the go-go juice - saying that, the L1 was almost as thirsty as my gixer (25-28mpg usual).

One thing I'd say if you were doing it, is either rebuild the engine yourself prior or get one from a trusted source or with a warrenty.

The B engine my mate got, was off some English nobjockey who had "just rebuilt it for his streetfighter but wouldnt fit" - should have known he was a fuckwit I said, as he smelled of shit.

Go for it if you like the old school looks and stance of the ZXR. Was a cracking bike when it worked.

He had issues with the wiring loom, lots of fucking around with the fueling too to get it just right.

Go for it if you think you are capable of it, if you need to follow step by step guides in a Haynes I'd maybe forget it lol - personally, I certainly would!

Still, it got a wee readers rides feature in Classic motorcycle (IIRC) twice this year.

https://img.photobucket.com/albums/v212/vitnotvette/ZXR750L1/DSC00475.jpg

P.S. (I think the 900 only fits the L & M models - but I could be wrong) - Edit - If Barry says I'm wrong, I'm wrong. Laughing
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Dr. DaveJPS
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PostPosted: 13:17 - 18 Jun 2009    Post subject: Reply with quote

ah i'd read this and knew there was a kit for the zx7r but didn't know about the zxr
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Barry_M2
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PostPosted: 14:03 - 18 Jun 2009    Post subject: Reply with quote

Mr Nice Guy wrote:
P.S. (I think the 900 only fits the L & M models - but I could be wrong) - Edit - If Barry says I'm wrong, I'm wrong. Laughing


Laughing

Only thing different on the J K L & M engine's are the internals. Wink In fact the J is really the odd one out. The K L & M are all the same apart from the gearbox's. The K & M got the C/R box, the L didn't. Despite what you might have heard / read, they K L & M all got the same cams too. The J ran lower compression and softer cams.

You'd be surprised at how similar the 9 & 750 engine's actually are! In fact the only 'real' difference is the cylinders, pistons and crank (between the 9R(B) and J K L M engines - P & N models had quite a few changes and nothing can really be swapped at all). The cylinders (barrels) are 10mm longer with slightly bigger pistons. They share the same design head which can be swapped between them if needed. Same crank cases, but with different gear ratio's but again, they can be swapped between motors. Fitting it is really very simple. It's just the two mounts either side of the head they dont line up (because of the 10mm extra on the stroke). But all you do is get it all in place and drill out the mounts on the head using the frame mount as a guide. Oh, and grind about 5mm of the frame mount away so the oil line doesn't foul it.

I built a 950cc big bore motor a few years ago with Wiseco pistons. I was also going to spilt the cases and put in the close ratio box from the K / M model, but decided it was too much hastle!

PS: I love the Yoshi can in that pic! I want one! Thumbs Up
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Last edited by Barry_M2 on 14:06 - 18 Jun 2009; edited 1 time in total
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Barry_M2
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PostPosted: 14:05 - 18 Jun 2009    Post subject: Reply with quote

DaveJPS wrote:
ah i'd read this and knew there was a kit for the zx7r but didn't know about the zxr


Yeah, the P & N need adaptors for the front (head) mounts. The ZXR just needs a 12mm drill bit and an angle grinder!! Wink Laughing
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Whosthedaddy
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PostPosted: 01:16 - 19 Jun 2009    Post subject: Reply with quote

Coxyzxr wrote:
Which did you like more the zxr or 7r?


The 7R for looks for sure but the ZXR for rider discomfort. I miss the painful wrists, sore back and just the head down and ass up approach to riding.
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Coxyzxr
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PostPosted: 05:18 - 19 Jun 2009    Post subject: Reply with quote

Whosthedaddy wrote:
Coxyzxr wrote:
Which did you like more the zxr or 7r?


The 7R for looks for sure but the ZXR for rider discomfort. I miss the painful wrists, sore back and just the head down and ass up approach to riding.



That's it, that 'attack mode' riding profile is just awesome in so many ways, even when your body's saying otherwise.
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Fisty
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PostPosted: 07:12 - 19 Jun 2009    Post subject: Reply with quote

Ive got a zx9r B engine for sale Razz
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Coxyzxr
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PostPosted: 07:16 - 19 Jun 2009    Post subject: Reply with quote

mr_fisty wrote:
Ive got a zx9r B engine for sale Razz


How much?
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Barry_M2
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PostPosted: 08:40 - 19 Jun 2009    Post subject: Reply with quote

mr_fisty wrote:
Ive got a zx9r B engine for sale Razz


Yeah, how much? Very Happy

EDIT - Just seen your post in Classifieds.

What condition are the motors in?
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Fisty
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PostPosted: 19:15 - 19 Jun 2009    Post subject: Reply with quote

The one at £100 has sold, t'other is 36,000 miles, barnett clutch, headgasket done 1500 miles ago, slight rattle on the genny chain ( not the camchain) oil and filter replaced every 2000 miles while in my possesion.
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Coxyzxr
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PostPosted: 08:49 - 20 Jun 2009    Post subject: Reply with quote

Decided it's going to be the ZX-9R.
Been doing alot of research and reading through past forum posts and enjoying what I'm hearing through-out.

Only thing I'm worried about is it'll need to be used as a winter commuter. Kawasaki's generally don't fare as well as say Honda during the harsh months but I guess it's all about staying on top of the little things and maintainence and it should be ok.

My zxr came to me in a state, I got it road worthy but never gave it the attention she deserved because of the original state it was in and she's suffered as a result. Absolutely bullet proof machines though and I really don't think I'd find another sports bike engine that's built like they are.

I'll hopefully be shopping for a zx9 in a few months and see what I can find and test out then.
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G
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PostPosted: 08:59 - 20 Jun 2009    Post subject: Reply with quote

I've used my 9r daily since the beginning of the year, including through the snow. Haven't washed/cleaned it once, lubed the chain.

Only 'problem' is the 6 pot tokicos, which need a service. However they haven't got any worse in the last six months, to be fair. Actually, I suspect just new pads and new discs would sort them, as both are quite worn at the moment.
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Coxyzxr
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PostPosted: 09:35 - 20 Jun 2009    Post subject: Reply with quote

G wrote:
I've used my 9r daily since the beginning of the year, including through the snow. Haven't washed/cleaned it once, lubed the chain.

Only 'problem' is the 6 pot tokicos, which need a service. However they haven't got any worse in the last six months, to be fair. Actually, I suspect just new pads and new discs would sort them, as both are quite worn at the moment.


That's actually quite re-assuring thanks!

I guess as I only have my ancient zxr to base opinions and predictions on, my judgement may not be totally accurate on what to expect from a new(er) machine.
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