ZX14/ZZR1400 Engine in a ZX12? - Kawasaki Forum :: KawasakiWorld.com
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post #1 of 25 Old 09-07-2016, 08:07 AM Thread Starter
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ZX14/ZZR1400 Engine in a ZX12?

Has it been done?

If any other engine is going to have a shot at fitting in a 12 I'm assuming the 14 would be the closest.

Would it involve a major amount of fabricating?
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post #2 of 25 Old 09-07-2016, 08:43 AM
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Yes and yes. I've researched this pretty in depth myself. Basically, not a lot of info out there. There is ONE guy who did it and posted online but his fabrication was hacked at best and he didn't really share many details.

The throttle bodies are different spacing. So you'll have to cut out the bottom of your frame (airbox) and weld in a new section that matches the ZX14 throttle bodies.

From my understanding, where the motor mounts into the frame on the bottom half needs to be widened. Again some cutting and welding involved.

Of course you'll have to swap out entire wiring harness and instrument cluster. I've got it bookmarked somewhere... you CAN use a gen 1 wiring harness and computer, it cuts out the added stuff on the new bikes (traction control) but perhaps save some money and/or give you more control. You have to add something, I think it's changing the plug on the cam sensor or something... i'll find you the notes...

Wouldn't be worth it for a gen 1 zx14, but could be some possible fun with a gen 2, 2012+ zx14r motor. You figure those motors are pumping out 190+ hp on most dynos (some over 200) with your standard pipe, filters, and tune. BUT a 1287 zx12r puts down the same type of HP, with less hassle, for probably a little less money then you'd have in the entire zx14r swap... but, perhaps more potential with the zx14r? It makes nearly 200rwhp in stock form... just think head/cam work and over bore, 220+ hp naturally aspirated. But then if we are talking a gen 2 motor with that much motor work, might as well just turbo your zx12r and have 300+ hp. So many variables.

I think it'd boil down to how cheap you could get a ZX14R motor and harness for. Is your current ZX12R motor blown or are you able to re-sell it to recoup some cost. Do you have the ability or know a good welder to make the required fabrications. Are you good with wiring. And how much money do you want to spend on an old horse like the 12R. I've seen some gen 2 ZX14Rs really coming down in price. Nice ones for $8k. Scratched up ones for $5-6k. You get the whole package with a new one, not just more powerful motor, but better brakes, suspension, etc.
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post #3 of 25 Old 09-07-2016, 10:29 AM Thread Starter
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Thanks for the input man! Don't go out of your way to dig up info or anything. In all honesty, it's just a bit of curiosity that's crossed my mind in the last few days.

Mostly because the #3 connecting rod is poking out of the back of my case and I've got a million things going through my head...
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post #4 of 25 Old 09-07-2016, 10:50 AM
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Gen 2 14r engine is a heavy heavy motherfucker.12r handles real nice stock but it will go to hell with the 14r engine. Pushing around the h2,12r and 14r in my garage tells the weight score.

2000 zx12r 65,500 mile( Now 6000 miles on 2003 brand new engine} street bike 9.6`s in the 1/4 a few times.My 2012 14r stole me away.8.9 swb stock engine Brocks bolt ons so far..Now my H2 piss`s on everything. H2 now Brocked out and I can`t control it. Oh well I tried.
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post #5 of 25 Old 09-07-2016, 11:26 AM
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Originally Posted by Redrider2k2 View Post
Thanks for the input man! Don't go out of your way to dig up info or anything. In all honesty, it's just a bit of curiosity that's crossed my mind in the last few days.

Mostly because the #3 connecting rod is poking out of the back of my case and I've got a million things going through my head...
Wait around and buy used 12R motor.
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post #6 of 25 Old 09-07-2016, 02:55 PM
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Wait around and buy used 12R motor.
Then do a 1287 plus headwork setup!....
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post #7 of 25 Old 09-07-2016, 04:14 PM
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or a turbo ;)

01 ZX-12R 8.84 @ 156.3 on dot tires, NA.... turbo 8.47 @ 164
00 ZX-12R 8.62 @ 165.2 no bars, slicks, 55 shot... turbo 8.32 @ 173
00 ZX-12R 1: 222.046 1.5: 226.390 Worlds Fastest NA Kawasaki
00 ZX-12R street turbo 1: 227.9 1.5: 234.1
00 ZX-12R LSR turbo 1: 249.5 1.5: 266.5 Worlds fastest ZX-12R CMG Racing RCC Turbos
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post #8 of 25 Old 09-08-2016, 03:14 AM
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There are lots of 12r parts about.
All you need to repair yours is currently on fleabay and cheap!
It would be cheaper and easier if you want a 14 to buy a 14 and break your 12 than to try and put a 14 in a 12 unless you can do it all yourself.
It would be cheaper and easier to make your existing 12r the same hp as a 14 or more :-)
You can even make your 12 1397 but 1199 is good for 7.0 200 mph on a turbo bike here in the uk. :-) Unfortunately not mine lol :-)
Good luck.
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post #9 of 25 Old 09-08-2016, 10:22 AM Thread Starter
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I'm pretty much open to anything at this point but it has to make financial sense. (I know, we've come to far to start making sense now, but still...)

I haven't cracked the motor open yet or even pulled it out of the bike yet. Just removed the fairings, seen inside bits on the outside, held back the vomit and went back in the house.

Parts for a 12 seem to be nearly nonexistent in my end of the country at the moment. Everyone I email about a complete engine says they have none and they're rare to find. I've had a look on eBay and it looks like what I might need is there but it's going to be freaking expensive.

I'm assuming:
Both engine cases
Crank
At least one piston/Rod/rings
Gaskets/Misc./etc

That's probably best case scenario too. Hitting the start button just has the starter motor freewheeling without engaging anything so it's safe to say something is destroyed there as well.

Unless I can possibly track down a source for an engine in Maine, it's not looking good.
It really sucks because this is not how I wanted to part ways with this bike. It's been like a member of the family over the last 5+ years and it's really looking like it's going to end up sold for parts...
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post #10 of 25 Old 09-08-2016, 10:09 PM
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You need to buy the parts and reassemble your motor :-)
Cases approx $200 with gears
block approx $200 with pistons
crank approx $200
Oil /filter gaskets approx $100

Or buy a rough complete bike and take the motor break the rest.
I bought a complete A1 that I ride daily for $1100
I bought a complete engine with everything including ecu and all sensors for $600

I recently blew my top end scrapping head , block and a piston
Used engine now perfect for fixing.

If you are able to fix you will be able to sort it. Just dont rush in and wait for parts to show.
If you cant fix it then my advice is sell it for parts complete and put the repair money towards another bike, its cheaper than paying someone to fix yours.

Good luck, im sure you will get it sorted.
Remember a used complete engine might not be any good, so only pay if its guaranteed. At least buying parts you can see the condition.
The engine is not too bad to get out and the engine is fairly straightforward to work on .. If you bike is mint low mileage its worth it. If its just average think carefully....
if you love it, its worth the pain :-)
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post #11 of 25 Old 09-09-2016, 09:49 AM Thread Starter
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Originally Posted by dave zx12r View Post
You need to buy the parts and reassemble your motor :-)
Cases approx $200 with gears
block approx $200 with pistons
crank approx $200
Oil /filter gaskets approx $100

Or buy a rough complete bike and take the motor break the rest.
I bought a complete A1 that I ride daily for $1100
I bought a complete engine with everything including ecu and all sensors for $600
If you're finding parts for those prices, send me some!

After a quick look on eBay:
Cases approx $600 empty
Cylinders approx $300 no pistons
Crank approx $275
Even complete bikes are tough lately. Most are low milage and want a premium price.

Looking at how the starter drive mounts has me wondering what went on in there...I think curiosity is going to get the better of me and I may end up pulling this engine back out again...
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post #12 of 25 Old 09-09-2016, 12:04 PM
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post #13 of 25 Old 09-09-2016, 12:04 PM
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Theres most parts at similar prices. I found a block with 3 pistons for $120 .
Try searching ebay in different countries too.
Good luck with it :-)

Last edited by dave zx12r; 09-09-2016 at 12:15 PM.
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post #14 of 25 Old 09-10-2016, 05:36 PM
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If you have the space I would sit on the bike and make it a long term project to rebuild it. Especially if you like it that much. Sound like the ball park on the parts cost is realistic with some patience.
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post #15 of 25 Old 09-11-2016, 02:51 PM
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Put 12 plastics on the 14 chasis.....prolly easier....

"In a world full of hate.....There is nothing left to divide."
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What's wrong with you people? The sky is MANY colors throughout the day....not JUST BLUE!
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