ZRXDean
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posted January 05, 2012 07:22 AM
Gen 4- Gen 2 ZX10 top end comparison pics
Here’s a side by side of some Gen 4 ZX10 OEM parts against the Gen 2 (06-07).
Rods. Gen 4 on right, ~ 20g heavier.
Piston domes. Gen 4 on right, ~ 3 grams lighter.
Piston skirts
Piston bottoms
Cams. Gen 4 foreground, much lighter, but I forgot to weigh. Lift went from 9.1 mm to 10.3mm. The intake buckets went from 25 (I think) to 29 mm.
  
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entropy
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posted January 06, 2012 12:12 AM
cool pix Dean!
add the nuts to the gen4 rods and they'll be even heavier 
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ZRXDean
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posted January 06, 2012 08:33 AM
In case you think I'm that dippy, I weighed them appropriately 
I'm a little surprised that they beefed them up so much, I never had an issue with the Gen 2 stock rods, and I was pushing them pretty hard...
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KZScott
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posted January 06, 2012 09:01 AM
great pics!. Ive often wondered why some cams have such a wide lobe on them compared to other very similar cams. stock zx12r vs stock busa for example.
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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
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Y2KZX12R
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posted January 07, 2012 05:49 AM
 Edited By: Y2KZX12R on 7 Jan 2012 13:50
Notice the increase in base circle on the cams to go with the 29mm buckets.
The rods look nice.
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dougmeyer
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posted January 10, 2012 02:07 PM
The rods are heavier on the "big" end. More rotating mass-crank inertia.
Lobe width is set by the PSI load on the bucket/tappet/rocker etc. Stronger springs or higher acceleration rates put more load on the parts and the load needs to be spread over a larger area for life and reliability.
New piston, less skirt area= lower friction. Looks like a forging, don't you think, Jim?
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kawa74
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posted January 11, 2012 07:54 PM
Any pics of combustion chambers, or ports , side by side ?? thanks
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ZRXDean
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posted January 12, 2012 01:10 PM
I sent off the head before taking pics. Maybe Jim will have something he can post at some point.
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Y2KZX12R
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posted January 13, 2012 09:16 PM
Edited By: Y2KZX12R on 14 Jan 2012 05:17
Doug, yes they are forged and very nice. They are a "box" design much like the "MX" CP is making now. Suzuki likes to remove most of the material from the base circles of the lobes to save weight. Since there's no contact anyway. I didn't have time to check the cams ramp profiles when i did Rickey's motor last year. I'm thinking the major intensity number is a 24 or 26 due to the high spring pressures from the factory. This could explain why they changed the cams and springs at the time of release last year.
I sent that piston off to RC at CP so we can get some made with more compression and deeper valve reliefs.
I can take some chamber pics. I have some laser scans of the chamber, but pictures are better to look at.
The ports are hand blended and flapper polished, much like the new zx14r. The exhaust ports are MUCH larger than the older zx10r's.
Dean, I'll be calling you soon on this.....
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Y2KZX12R
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posted January 13, 2012 09:19 PM
By the way, its nice to see you posting on bikeland again Doug.
Hey, what are you doing in April? Are you going to be near Wilmington...?
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dougmeyer
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posted January 15, 2012 06:27 PM
Thanks Jim. I'm finding a little more time, it's my "Off Season" 
(except that I'm at Barret-Jackson right now, and as soon as I'm done here I have to head for Brazil.......)
I am trying to put together a visit to Wilmington, but I want to bring my own bike so I'm looking at "logistics".
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Y2KZX12R
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posted January 16, 2012 01:46 PM
I'll be watching the Barret-Jackson on Speed.... I'd love to head down to that one of these years. Every so often Jaime thinks maybe she will sell her 67 chevelle SS. I guess that would be the place to sell it.
Have you ever tried Forward Air for shipping a bike? They have steel lockable bike shipping containers. They ship major airport to major airport. You call them a few weeks ahead of time and they will have one ready at your airport of choice. We could go pick it up with my trailer at the nearest major airport to Wilmington.
I've used them several times. Never a problem.
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Johnnycheese
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posted January 17, 2012 03:57 AM
Edited By: Johnnycheese on 17 Jan 2012 11:58
forward air
the only way to go 
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Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
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ZRXDean
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posted February 14, 2012 05:51 PM
Here's some pics of the Gen 4 airbox. The outside velocity stacks have an interesting design, much different than the Gen 2.
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