Head gasket numbers

[Redonthehead]

Houston I believe we may have an issue, so cpl weeks ago I bought (1) head gasket # 2C0-11181-01 off ebay all in factory packaging supposed to be for an 06 up R6, Today I am surfing ebay again and find one 5SL-11181-00-00 for an 03-09 R6. before I ordered I went on two parts suppliers sites and looked at part #'s. what is the difference between these gasket part numbers before I make a mistake.

 

[weehe]

I'm planning on doing the thinner R6 head gasket at some point and have part number 5SL-11181-00-00 on my list. Assuming these pictures are correct, the head gasket you have probably will not work.

Stock:
https://www.partzilla.com/product/y...?ref=96ab6c7d3e73d392d6ecb53c51f90807d50bbccd

5SL-11181-00-00:
https://www.partzilla.com/product/yamaha/5SL-11181-00-00

2C0-11181-01:
https://www.partzilla.com/product/yamaha/2C0-11181-01-00

 

[FinalImpact]

I didn't do a where used on the 2C #### but I think they are not for us. Look down here.... 03 - 05 R6 YEC race parts. Doubt I'd jump to 0.40mm 13:1 with out a lot more research. That said it could be 10hp right there. I would have my tune in check with a proper fuel controller before bolting this in and obviously the proper fuel is needed.

5VX-11181-00-00 FZ6 12.1:1
5SL-11181-00-00 R6, R6S 12.4:1
-
YEC OPTIONS:
5SL-11181-00, R6, R6S 0.60mm
5SL-11181-85, R6, R6S 0.55mm
5SL-11181-80, R6, R6S 0.50mm
5SL-11181-75, R6, R6S 0.45mm
5SL-11181-70, R6, R6S 0.40mm

As I know it, 0.40mm puts it at 13.0:1 or maybe 13.1:1

So, let the mods begin!!!

Tag JJD952 #mods #crisis

 

[FinalImpact]

[MENTION=25322]I JET[/MENTION]
Any chance you saved you old head gasket and can measure a carbon free area around the inside of cylinder?

Best guess is it comes in at 0.70mm thick if calculations are correct. Give or take 1mm Blah

 

[I JET]

[MENTION=25322]I JET[/MENTION]
Any chance you saved you old head gasket and can measure a carbon free area around the inside of cylinder?

Best guess is it comes in at 0.70mm thick if calculations are correct. Give or take 1mm Blah

No sorry mate, I didn't hang onto it.

 

[bigborer]

Which gasket thickness do you need? The OEM FZ6 one?

 

[FinalImpact]

Which gasket thickness do you need? The OEM FZ6 one?

Yes, one that has been compressed fully through sealing area of the combustion chamber seal.

Thanks!

 

[bigborer]

Here you go- measured at 3 different points.
The micrometer is in mm

 

[FinalImpact]

Here you go- measured at 3 different points.
The micrometer is in mm

I should know this but I need to see the scale on the inner barrel. I doubt each mark is 1mm or is it?
How much is one revolution on that mic and how many graduations are there per revolution? It doesn't seem like there is enough room for 100 graduations around rotating part of the mic.

Thanks for posting tho! Much appreciated and if it allows - a rep point headed your way.

 

[bigborer]

You're welcome!

With metric micrometers only the 0.001mm ones have the additional lines parallel to the shaft (at least as far as I've seen so far). Mines are 0.01mm so you only have what's in the picture.
Don't know the technical name for the micrometer parts but let's say that there's the fixed part, and the part that rotates. On the fixed part all grading is 0.5mm apart (with all lines from the side with 0 being 1mm apart). On the rotating part you have the 0,xx mm added to the nearest fully visible mark from the fixed side.

First pic is 0.5 + 0.35 = 0.85mm . Next 2 are 0.819 and 0.838mm.

 

[FinalImpact]

Thanks again.
Wow, even if when compressed it measures 0.75mm thats a long ways from 0.70mm.
I made a compression ratio calculator (html) but I don't know what the heads volume is.
Let me see if I can find that. It might help a little.

 

[FinalImpact]

Oh my.... hit by the bug again.
OK - I did some calculations to see if theses values correspond to published values and they are super close.
I found an htm/java based compression ratio calculator I wrote 20 years ago. And ya, English units throughout most of it. lol


YEC OPTIONS:
5SL-11181-70, 0.40mm = 13.03:1
5SL-11181-75, 0.45mm = 12.87:1
5SL-11181-80, 0.50mm = 12.72:1
5SL-11181-85, 0.55mm = 12.55:1
5SL-11181-00, 0.60mm = 12.40:1
0.65mm = 12.27:1
-
5VX-11181-00-00, 0.70mm = 12.15:1
0.75mm = 11.97:1
0.80mm = 11.84:1

Bore: 65.55mm / 2.58"
Stroke: 44.5mm / 1.75"
Head Volume from 10.33cc to 10.93cc // used 10.6cc
Piston Skit Clearance: 0.001"
Dome/Dish Volume: used 0.49cc - Doesn't seem right though.

I have the code for this if anyone wants it and could convert it to metric if someone has a need. It's from my old V8 build days trying to figure out what head, piston, gasket would yield 10:1 CR.