Y2KZX12R
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posted February 03, 2009 05:45 AM
1427 zx12r Build
Well the old y2kzx12r is going to get a fresh build this year after having been apart for 2 seasons on the back burner. I took it apart as a 1375 for routine maintainance after 3 seasons and several thousand hard street miles. Other projects and things kept the bike in the back corner of the shop for a few years, but not the cobwebs are coming off.
This past fall I decided to make it a 1427.
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Y2KZX12R
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entropy
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posted February 03, 2009 05:50 AM
YEAH!!!
sell yr stroker crank?
send off another one to get it stroked & offset?
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TRNorBRN6001
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posted February 03, 2009 08:11 AM
Very very nice Jim! keep us up-to-date on that build.
Gary
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osti33
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posted February 03, 2009 08:31 AM
Sweet! We love more displacement. 
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SteddyTeddy
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posted February 03, 2009 08:42 AM
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Y2KZX12R
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posted February 03, 2009 09:27 AM
Karl, I'm gonna run the same 60mm crank. I'd love to get a billet crank but not this time around.
Its still mostly in the planning stages but I'm sending out the cams to get ground with "special" grinds that should take advantage of the big valve Stg 2 head.
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Y2KZX12R
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entropy
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posted February 03, 2009 09:38 AM
quote:
Karl, I'm gonna run the same 60mm crank. I'd love to get a billet crank but not this time around.
Its still mostly in the planning stages but I'm sending out the cams to get ground with "special" grinds that should take advantage of the big valve Stg 2 head.
Jim,
i had a pisser time with wrist pin galling until i went to an offset crank.
my advise?
sell yr stroker crank for $500 + stocker, spend an additional $600 to get the crank stroked and offset. It will save you a ton of aggravation.
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Y2KZX12R
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posted February 03, 2009 02:44 PM
Scott knows what usually causes writs pin galling, right Scott? 
If I was to go that route Karl, I wouldnt need to sell the crank. Just get it offset ground.
I know what your next question is going to be... 
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Y2KZX12R
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2000redrocket
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posted February 03, 2009 03:43 PM
would it be things touching that are not suspose to???
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KZScott
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posted February 03, 2009 04:33 PM
pistons hitting exh valves and the head might have had something to do with it when spraying big and hitting the limiter lol
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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KZScott
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posted February 03, 2009 04:43 PM
is the only reason you are staying with a 4.6mm crank because you allready have one? im suprised you didnt opt for a 5mm or bigger. im pretty sure you can make a big stroker live a long time
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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whitehendrix
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posted February 03, 2009 08:07 PM
quote:
pistons hitting exh valves and the head might have had something to do with it when spraying big and hitting the limiter lol
nah.. its cuz you built a spaghetti motor!!
Jim.. pics and retardedly simply breakdowns for my mind to follow, please? lol
this is going to be epic.
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Duct tape is the handyman's secret
weapon. The black is for formal
occasions. - ZRXDean
ill never own a busa unless
someone gives me one.... and then
ill sell it -KZScott
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Y2KZX12R
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posted February 04, 2009 05:18 AM
Yep, Basically I'm using it because I have it.
But Karl has a point its better to have the rod centered. Maybe I'll set it up so the pistons guide the rods on this one.....? Would be worth a few HP but a PITA to setup.
WH, at some point there will be pics, but I'll have to have somthing to take pics of...
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brickman
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posted February 04, 2009 05:49 AM
if any one has a 4.6 or up used crank. keep me in mind if your thinking of letting it go. i have a stock one put up i well send to.
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TRNorBRN6001
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posted February 04, 2009 06:26 AM
How about starting with a picture of you and the bike? Just not in a speedo!
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Y2KZX12R
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posted February 04, 2009 07:02 AM
LOL..... that wouldnt be very interesting.
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Y2KZX12R
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entropy
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posted February 04, 2009 07:42 AM
quote:
Maybe I'll set it up so the pistons guide the rods on this one.....? quote:
uhhhhh, please elucidate
before i went to an offset crank, the inside of the wrist pin bosses were rubbing on the rod sm ends, even tho when i had checked static there was some clearance. Go figure.
The galling was pretty ugly, had to drive the pins out with a hammer.
I had the boss-to-boss width opened up and no more rubbing, but the galling continued.
With the offset, obviously no rubbing, and now it is satisying to push the pins out with fingers, or just very minor tapping.
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Y2KZX12R
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posted February 04, 2009 08:11 AM
Cup engines are using piston guided rods for the last several years. The rods dont ever touch the crank or the companion rod on the sides of the rod. Reduces friction because the crank pins and loading dont let the rods "float" like you might think. They get jambed and shoved together under load like a clutch pack.
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Y2KZX12R
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WRECKSHOP
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posted February 04, 2009 10:00 AM
Wow, you guys are real engine GURU'S....Also, for a peace of mind just have the wrist pins DLC coated and that alone helps with friction and virtually eliminates galling or rubbing in case there is an oil pressure issue !!! Just my .2cents.....
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KZScott
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posted February 04, 2009 12:31 PM
I noticed CP piston pins are DLC coated allready.... i wonder if it would be wise to buy a set, or have a set of JE pins coated?
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
|
osti33
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posted February 04, 2009 01:49 PM
 Edited By: osti33 on 4 Feb 2009 21:51
quote:
I noticed CP piston pins are DLC coated allready.... i wonder if it would be wise to buy a set, or have a set of JE pins coated?
I have a set of the DLC coated pins from CP. They are nice pins. A bit pricey at about 100-125 dollars per pin if I remember correct. It's been a while since I bought them so I can't be 100% certian about the price.
If I had it to do over again I probably would just buy the standard pins. I don't think you gain a whole lot from the coated pins. A little less friction maybe. That and they sure look pretty.
When I had my 12 and was running the Carpenter cams they were just eating the buckets. I switched to a set of DLC buckets from Muzzy and that problem went away. So there I have to say the DLC coating was worth it. That was a long time ago (around 2002) but I think they were 800-900 dollars for a set of buckets. I think I could have also solved the problem with oversize buckets but didn't know anything about it back then.
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Y2KZX12R
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posted February 05, 2009 05:15 AM
It might be worth it on the pins on this build.
I dont know what the cam specs are on the carpenter cams but it sure sounds like they were running off the bucket.
O/S buckets would be a little cheeper even with the boring of the head vs. getting new buckets and coating them.
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kawpower
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posted February 05, 2009 05:43 AM
Y2K ,what was the heat shield materal called that i got from u in 01 on my 12r and were can i get it? thanx.
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Cecil County 2010 Motorcycle ET Champ. 9 Wins- 4 RUs .06zx14 turboed for 2012 .
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Y2KZX12R
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posted February 05, 2009 08:39 AM
Reflectix or somthing like that. Sold at Home Depot. Get the 16" wide stuff.
Wow, that brings back some memories.
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Y2KZX12R
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kawpower
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posted February 05, 2009 09:31 AM
its still going strong on the 12r and it really works , making 1 for my 14 now, thanx again.
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