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Buell Forum » XBoard » Archive through April 23, 2013 » Horepower XB12 « Previous Next »

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Cobra66
Posted on Monday, March 11, 2013 - 03:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Hey, how are you guys doin. Just curious what is the maximum reliable horsepower that anyone has ever heard of from an xb12.
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Crabby
Posted on Monday, March 25, 2013 - 06:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Depends on how much you want to spend?

If you punch the motor out, 131 RWHP and 119 TQ are possible
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Trojan
Posted on Tuesday, March 26, 2013 - 10:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Haven't we been here before recently?

http://www.badweatherbikers.com/buell/messages/327 77/707400.html?1364132492
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Teeps
Posted on Tuesday, March 26, 2013 - 12:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Trojan Posted on Tuesday, March 26, 2013
Haven't we been here before recently?

Yes.
And, without defining "reliable" the question is moot...
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Trojan
Posted on Tuesday, March 26, 2013 - 12:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
my sentiments entirely : ) Reliability is a very subjective subject. My idea of reliability is that the bike should last for a whole year without a major rebuild (even a race bike!).

130bhp would probably entail an engine life between rebuilds of significantly less than I would be happy with......and it I wanted 130bhp I would buy another bike anyway ; )
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Hurricaneleah
Posted on Tuesday, March 26, 2013 - 02:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
weak points are cases/pulling studs on big bores, and rod big ends. 2008 and up crank fixies the rod issue. The best I have done with a stock bore XB12 is 114rwhp (dynojet 200i). That motor has been together for 4 years, although it only has about 7 weekends on it in two seasons of racing.
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Crabby
Posted on Monday, April 08, 2013 - 03:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
4500 miles on the rebuild, 0 issues so far.

it is a 90 CI engine though
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