New (to me) ZX12R... issues - Page 2 - ZX Forums
Reply
 
LinkBack Thread Tools
post #21 of 43 (permalink) Old 06-06-2015, 06:49 AM Thread Starter
Newbie
 
Joined: Nov 2013
From: Durham NC
I Ride: GPZ 1100e, Superhawk 996

Posts: 28
Well, looks like she needs a rebuild. I am not surprised, I got her cheap with the assumption it was probably the worst-case.

Anyway, anyone have any opinions about rebuild vs motor swap?

Also, the crank assembly on the beast is like $1200+ from Kawasaki. Seema little crazy. Can those be repaired?
skidmarkart is offline  
Sponsored Links
Advertisement
 
post #22 of 43 (permalink) Old 06-20-2015, 07:26 AM
Senior Member
 
Spree70's Avatar
 
Joined: Feb 2015
From: Yeadon, PA
I Ride: 04 ZX12R The Fast Blue one! 95 zx7 The Other Fast Blue one!

Posts: 107
I would do a 1370 rebuild
Spree70 is offline  
post #23 of 43 (permalink) Old 06-20-2015, 10:37 AM
Newbie
 
Joined: May 2015
From: Devon UK
I Ride: ZZR1100 D4 Candy wine red

Posts: 7
Hello Spree, sorry what does a 1370 rebuild mean please?
jerrypeters is offline  
 
post #24 of 43 (permalink) Old 07-07-2015, 09:42 AM
Senior Member
 
Spree70's Avatar
 
Joined: Feb 2015
From: Yeadon, PA
I Ride: 04 ZX12R The Fast Blue one! 95 zx7 The Other Fast Blue one!

Posts: 107
Muzzy, probably other companys also offer a kit that takes the 1199cc motor of the 12r to a 1370 200+hp monster!
Spree70 is offline  
post #25 of 43 (permalink) Old 07-07-2015, 10:45 AM
Senior Member
 
Joined: Aug 2012
From: Hillsboro, Oregon
I Ride: '92 ZX-750K

Posts: 188
I beliwve zxzone.com also has something along those lines for a 1370 death motor from hell... lol
The-Kid is offline  
post #26 of 43 (permalink) Old 07-08-2015, 10:10 AM
Senior Member
 
Spree70's Avatar
 
Joined: Feb 2015
From: Yeadon, PA
I Ride: 04 ZX12R The Fast Blue one! 95 zx7 The Other Fast Blue one!

Posts: 107
Go for it!
Spree70 is offline  
post #27 of 43 (permalink) Old 11-23-2015, 10:05 AM
Senior Member
 
Joined: Jun 2010
From: Westminster, CO
I Ride: A brand new 1995 Lime Green ZX9r

Posts: 798
I had my zx9r crank rebuilt by APE, so I think your crank could be redone as well.

It may be a pig.....but it's my pig!
Rick S. is offline  
post #28 of 43 (permalink) Old 11-23-2015, 02:21 PM
Senior Member
 
Hammerhead's Avatar
 
Joined: Mar 2008
From: Southern Illinois
I Ride: '07 ZX-14

Posts: 11,735
Quote:
Originally Posted by Rick S. View Post
I had my zx9r crank rebuilt by APE, so I think your crank could be redone as well.
It better. Push all that bhp through a stock crank and the motor will be a hand grenade with the pin pulled. Not to mention the weak stock clutch and the gearset, which is probably worn out also.

If you are going to do a rebuild, especially a larger-bore job, you will need to examine every moving part and probably replace most of them.

It may be a pig, but it's a pig with a rocket in it's ass!
Hammerhead is offline  
post #29 of 43 (permalink) Old 11-23-2015, 03:07 PM
Senior Member
 
Joined: Jul 2009
From: Long Island
I Ride: 2002 ZX-12R

Posts: 549
1370cc stroker doesnt last long...to much offset on rods
1270 is the way to go...I woud go stock forged bore+turbo

2002 Passion Red zx-12r
Flush mount signals,retrofitted projectors(yes I forgot demon eyes lol)indiglo gauges, under tail and integrated taillight,gear indicator,BMC race air filter, kleen air mod, scotts dampener,14r QAthrottle, advanced ignition,Full muzzy exhaust+PCV with autotune+bonneville box going for 200mph
wisniaPl is offline  
post #30 of 43 (permalink) Old 11-23-2015, 07:33 PM
Senior Member
 
2fat2fly's Avatar
 
Joined: Oct 2008
From: Ohio
I Ride: 91 ZX7R,93 ZX7R,00 ZX12R, 87 YSR50, 87 GSXR750,93 ZX7, 92 ZX7

Posts: 5,935
Garage
If I were to build another 12 I believe I would go turbo.

"Any man who thinks he can be happy and prosperous by letting the government take care of him --- better take a closer look at the American Indian." Henry Ford

My Turbo ZX12R Build:
http://www.zxforums.com/forums/zx-12...ave-today.html

My 1993 ZX7R (M1)
http://www.zxforums.com/forums/zx-7r...r-real-m1.html

http://www.zxforums.com/forums/zx-7r...-m1-naked.html
2fat2fly is offline  
post #31 of 43 (permalink) Old 11-24-2015, 04:51 AM
Senior Member
 
Hammerhead's Avatar
 
Joined: Mar 2008
From: Southern Illinois
I Ride: '07 ZX-14

Posts: 11,735
Or you could just transplant a known good ZX-14 or 14R motor into it and fuggitabout all the bs of getting everything rebuilt and turbo added etc. Personally, I'd love to buy a ZX-12R with a blown motor and then find a crashed ZX-14 for the transplant surgery. Might have to park my old car outside under a tarp for the winter, but it would be worth the effort.

It may be a pig, but it's a pig with a rocket in it's ass!
Hammerhead is offline  
post #32 of 43 (permalink) Old 11-24-2015, 12:45 PM
Senior Member
 
Joined: Jul 2009
From: Long Island
I Ride: 2002 ZX-12R

Posts: 549
Quote:
Originally Posted by Hammerhead View Post
Or you could just transplant a known good ZX-14 or 14R motor into it and fuggitabout all the bs of getting everything rebuilt and turbo added etc. Personally, I'd love to buy a ZX-12R with a blown motor and then find a crashed ZX-14 for the transplant surgery. Might have to park my old car outside under a tarp for the winter, but it would be worth the effort.
Its not that easy...unles you get zx14R engine reg zx14 engine is not worth a transplant, since 12 makes the same power with mods

2002 Passion Red zx-12r
Flush mount signals,retrofitted projectors(yes I forgot demon eyes lol)indiglo gauges, under tail and integrated taillight,gear indicator,BMC race air filter, kleen air mod, scotts dampener,14r QAthrottle, advanced ignition,Full muzzy exhaust+PCV with autotune+bonneville box going for 200mph
wisniaPl is offline  
post #33 of 43 (permalink) Old 11-24-2015, 01:59 PM
Senior Member
 
Hammerhead's Avatar
 
Joined: Mar 2008
From: Southern Illinois
I Ride: '07 ZX-14

Posts: 11,735
That depends on how much cubic money you want to throw at it. More horsepower=shorter life. Show me a modded 12R motor that runs like a top with 55K on the clock. I have the "not worth it" 14 motor in my garage that does. Chances are you'll have more bucks in the modded 12 motor than I have in my whole bike. Good used 14 motors go for $2500-3000, about the price of a stock replacement crank for a 12R.

It may be a pig, but it's a pig with a rocket in it's ass!

Last edited by Hammerhead; 11-24-2015 at 02:08 PM.
Hammerhead is offline  
post #34 of 43 (permalink) Old 11-25-2015, 04:13 AM
Senior Member
 
Joined: Jul 2009
From: Long Island
I Ride: 2002 ZX-12R

Posts: 549
Quote:
Originally Posted by Hammerhead View Post
That depends on how much cubic money you want to throw at it. More horsepower=shorter life. Show me a modded 12R motor that runs like a top with 55K on the clock. I have the "not worth it" 14 motor in my garage that does. Chances are you'll have more bucks in the modded 12 motor than I have in my whole bike. Good used 14 motors go for $2500-3000, about the price of a stock replacement crank for a 12R.
Its all depends how much you want to spend
Plenty zx12r with highg miles especialy b models, on diff forums
Looks like the ones to granade are a1 and 2 models with lighter cranks
Rumor is kawi was rushing production to meet deadline, some had diff size bearings etc

You have to admit its a lot of custom work to swap zx14 engine,that will cost time and $$
A lot of people wont try that in their garage, so they will pay even more $$ for shop to do it.
By the time you are done for the same Money you can have stock bore forged 12 with basic turbo kit that will easily hit 400whp
Kz scoot proved that on his street zx12r not to meantion his lsr one that hit over 250mph with plenty power for more
Also 2fat has turbo 12 on stock bottom end that is pushing some power

2002 Passion Red zx-12r
Flush mount signals,retrofitted projectors(yes I forgot demon eyes lol)indiglo gauges, under tail and integrated taillight,gear indicator,BMC race air filter, kleen air mod, scotts dampener,14r QAthrottle, advanced ignition,Full muzzy exhaust+PCV with autotune+bonneville box going for 200mph
wisniaPl is offline  
post #35 of 43 (permalink) Old 11-25-2015, 07:37 AM
Senior Member
 
Hammerhead's Avatar
 
Joined: Mar 2008
From: Southern Illinois
I Ride: '07 ZX-14

Posts: 11,735
Its all depends how much you want to spend

Exactly. It's all about the ratio of time investment vs. dollars.

I'd still like to attempt it if suitable donors were available locally. IMO Kawasaki has never exceeded the stylish looks of the 12R, but 14w are more powerful and reliable, so it would be the best of both worlds.

It may be a pig, but it's a pig with a rocket in it's ass!
Hammerhead is offline  
post #36 of 43 (permalink) Old 11-25-2015, 08:31 AM
Senior Member
 
Joined: Jul 2009
From: Long Island
I Ride: 2002 ZX-12R

Posts: 549
Quote:
Originally Posted by Hammerhead View Post
Its all depends how much you want to spend

Exactly. It's all about the ratio of time investment vs. dollars.

I'd still like to attempt it if suitable donors were available locally. IMO Kawasaki has never exceeded the stylish looks of the 12R, but 14w are more powerful and reliable, so it would be the best of both worlds.
Imagine 14 engine with supercharger(forgot the company Name) in zx12r
That would be an amazing machine

2002 Passion Red zx-12r
Flush mount signals,retrofitted projectors(yes I forgot demon eyes lol)indiglo gauges, under tail and integrated taillight,gear indicator,BMC race air filter, kleen air mod, scotts dampener,14r QAthrottle, advanced ignition,Full muzzy exhaust+PCV with autotune+bonneville box going for 200mph
wisniaPl is offline  
post #37 of 43 (permalink) Old 11-25-2015, 09:12 AM
Senior Member
 
Hammerhead's Avatar
 
Joined: Mar 2008
From: Southern Illinois
I Ride: '07 ZX-14

Posts: 11,735
I can't ride the one I have to it's full potential.

It may be a pig, but it's a pig with a rocket in it's ass!
Hammerhead is offline  
post #38 of 43 (permalink) Old 11-25-2015, 11:20 AM
57x
7777
 
57x's Avatar
 
Joined: Apr 2010
From: Aromas, CA
I Ride: 2014 Ninja 1000, lots of ZX7s and Z1000s

Posts: 5,941
http://losangeles.craigslist.org/lgb...324511105.html


Builds in Progress
K ZX7R Superbike-ish
M ZX7R Crevier Superbike - Complete
M ZX7R Russell Superbike
N ZX7RR Yanagawa-ish Superbike
Z750S Frankenstein-ish bike
57x is offline  
post #39 of 43 (permalink) Old 11-28-2015, 09:57 AM
Senior Member
 
Joined: Jun 2010
From: Westminster, CO
I Ride: A brand new 1995 Lime Green ZX9r

Posts: 798
LOL that looks right up my alley, so to speak...

It may be a pig.....but it's my pig!
Rick S. is offline  
post #40 of 43 (permalink) Old 11-29-2015, 06:53 PM
Senior Member
 
Joined: Nov 2006
From: atl. Ga.

Posts: 546
EBay has a good crank with rods and bearing for 500.....I would just install it with another 100 in some gaskets,oil filter,and oil....and be back riding

If you want to go big motor,check out bikeland.org 12r forums.....read entropy stuff....he got a proven engine building tips on a 12r to keep a stroker big bore running reliable
moko is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the ZX Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome