Join Date: Jan 2006
Location: Colorado Springs, CO
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.