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Buelldad
| Posted on Saturday, January 16, 2010 - 02:17 am: |
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whats the difference in the xb 9 & the xb 12 piston -what ive measured there the same bore & ihe pin to piston deck & pin dia are the same --but catalogs show them as different ?? |
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Knickers
| Posted on Sunday, January 17, 2010 - 07:52 am: |
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The 9 piston is domed to give a smaller combustion chamber. That keeps the compression ratio the same as the 12 with the shorter stroke 9 crank. If you put 9 pistons into a 12 motor you get a higher compression ratio. Somewhere in the 12:1 range. |
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Buelldad
| Posted on Wednesday, July 27, 2011 - 03:31 pm: |
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what im seein only the xb9r is domed i have some xb9 not r pistons & they are flat |
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Blake
| Posted on Thursday, July 28, 2011 - 07:56 am: |
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Then they are not stock/OEM XB9 pistons. |
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Blake
| Posted on Thursday, July 28, 2011 - 08:00 am: |
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There is absolutely no difference between engines for XB9 "R" and "S" model bikes. |
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