What bore is a 107 Inch

[GoFast.....]

I think a 107 is a 4 in.

[Herko]

4.125 over a 4.00 stroke.

[HD/Wrench]

3.937 over 4 3/8

[Herko]

Yep, that too. (106.5)
I was thinking though, that his upcoming build was a 4.00 stroke bored case version?? (106.9)

[ejk_dyna]

<<Yep, that too. (106.5)>>

yeah but herko you listed the GOOD 107....

[Scramjet]

This may help:

Bore   Stroke   Displacement
3.750   4.00   88.4
3.875   4.00   94.3
4.000   4.00   100.5
4.060   4.00   103.6
4.125   4.00   106.9
4.250   4.00   113.5
      
3.750   4.375   96.6
3.875   4.375   103.2
4.000   4.375   110.0
4.060   4.375   113.3
4.125   4.375   116.9
4.250   4.375   124.1
      
3.750   4.50   99.4
3.875   4.50   106.1
4.000   4.50   113.1
4.060   4.50   116.5
4.125   4.50   120.3
4.250   4.50   127.7

3.750   4.625   102.2
3.875   4.625   109.1
4.000   4.625   116.2
4.060   4.625   119.8
4.125   4.625   123.6
4.250   4.625   131.2


B

[GoFast.....]

thanks guys 4.125

[Faast Ed]

I already forgot what year bike he was building, I though it was an 07?

[GoFast.....]

it is a 07 with the stroked rods

[Faast Ed]

Then I think the numbers in GMR's post are the ones you need. (3.937)

No room for mistakes there, no doubt.

[GoFast.....]

I'm ordering head gaskets for it so I have to have the right size

[Deye76]

I think a 107 is a 4 in.

It is..........if it's a S&S evo

[GoFast.....]

I think a 07 107 0.30 head gasket takes a 4" head gasket http://www.cometic.com/harleydavidson.aspx

Part number  C9725

[Coff 06]

The 4" were all I could find at Cometic for my 3.937 jugs I just installed on my 06, 98",(4.00 stroke),run's great,no problems.           Coff 06

[Scramjet]

The ID on the 3.875" bore Cometic head gasket measures 3.910" so 4" may be a little big for a 3.937" bore.  Thirty five thou big is one thing.  Sixty two thou big seems a bit much to me.

Call Cometic.  They will have the correct answer.

B

[bigpete1]

the same bore as the 98" motor that you built for the nighttrain .

[GoFast.....]

I thought it was, you have to order a 4" head gasket for it