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Buell Forum » Quick Board » Archives » Archive through July 04, 2012 » Piston swap « Previous Next »

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Odd
Posted on Wednesday, June 20, 2012 - 02:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
I know I've seen this somewhere,cannot find the thread though. Has anyone put 984 pistons into a 1203?
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Barker
Posted on Wednesday, June 20, 2012 - 04:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
IIRC compression ratios shoot up to something like 13:1. This might be challenging with pump gas.
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Brother_in_buells
Posted on Wednesday, June 20, 2012 - 04:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
This one!?
http://www.badweatherbikers.com/buell/messages/327 77/626505.html
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Odd
Posted on Saturday, June 23, 2012 - 03:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
yes to high, I would like to run about 11:1. anyone know how much I would have to mill off the heads?
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Brinnutz
Posted on Monday, June 25, 2012 - 12:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
I have XB9 pistons in my 1203 tuber motor. It runs just shy of 12:1 compression and runs beautifully on 93 octane (even better on a tank of 100 octane).

I used the stock crank and XB heads. Even my cams are cut just the same as XB cams.
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Natexlh1000
Posted on Monday, June 25, 2012 - 01:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Cool! so you have the fancy beehive springs and narrow valvestems too?

How did you manage the Cams?
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Brinnutz
Posted on Monday, June 25, 2012 - 01:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Custom grind to match the XB's, but with the correct bushing size to mount in the tuber bushings.

Heads are completely bone stock XB heads.
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Odd
Posted on Tuesday, June 26, 2012 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
are you racing the bike or everyday use?
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Brinnutz
Posted on Tuesday, June 26, 2012 - 05:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Everyday use.
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