Thread: XR650R Thread!
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Old 05-17-2013, 01:16 PM   #17047
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Joined: Jul 2005
Location: Tampa
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Originally Posted by BuRPsa View Post
Come on BikePilot,

and nice car so btw, but that engine has a large part of the combustion chamber in the piston crown, a large indentation, plus it is a blown engine - hence it follows that those are hardly the lightweight piston type as the above Ross is, so that apple-pear comparison aint valid. Also, that engine's way better cooled than our pigs, marginal springs to mind.


nice pistons indeed - keep us updated if you buy one please?
I think Porsche made 14 blown 968s, which, sadly, mine is not. It's N/A. I wouldn't call the XR650Rs piston a lightweight type piston, but that's a relative thing I suppose. Anyway, just one datapoint.

US octane is roughly the same as ROW, it's just commonly measured differently.
'09 Buell XB12XT, TL1000S, H1F, M620, CR250R, KX100, XR650R, Cota 315R

Summer 2009 Ride Report
Summer 2008 RR.
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