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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Big Mechanicals: Head, Cyl, Piston, Rod, Crank, Flywheel, Cases, Bearings » Archive through May 04, 2010 » XB9 cylinders w/ thunderstorm pistons and heads? « Previous Next »

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Pkforbes87
Posted on Monday, January 26, 2009 - 10:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
I'm rebuilding a motor in an X1, and have got my hands on thunderstorm pistons and heads from an M2, but I'm looking for cylinders and prefer to find something used instead of paying new price.

I see on buell.com that the 9's and 12's have the same bore, so are the cylinders the same?

I'm under the impression that the 9 combines a shorter stroke with a domed piston in the same cylinder - resulting in less displacement and the same compression.

Anyone know if that's true?
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Bombardier
Posted on Tuesday, January 27, 2009 - 03:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Bore is the same.

Longer stroke on the 12.

9 pistons in a 12 give a higher static CR.
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Alex
Posted on Tuesday, January 27, 2009 - 06:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Cylinders are the same.
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Loki
Posted on Thursday, January 29, 2009 - 02:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
PK

Ping me offline, I may have an offer for you to consider.

Loki
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