2012 1000cc? Not end of world?

DRILL said:

FFS !!!!!! Shall we wait until they are out on the circuit ? OR just condemn them now !!!

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mylexicon said:

AFAIK, true statement.



IIRC, engine friction is dependent upon fluid dynamics (micro oil film on reciprocating engine parts) so friction is reduced even if the stroke is increased. Furthermore, longer stroke engines can be more efficient b/c take longer to go from TDC to BDC so they extract more of the combustion force and they don't push expanding gasses out of the exhaust port.



Here's the tricky part, imo. Torque = force x radius so if you add 10mm of stroke, you're adding a lot more torque. Sounds nice, but wheelie control is already working overtime to rein in the 800s. If the bikes are more prone to wheelie, they will be slower for two reasons. First, wheelie control is cutting additional power to counteract the additional torque. Second, the engine takes longer to extract the combustion work so it doesn't rev as freely and it may even accelerate a bit slower than an 800 or a 900 with the same bore. They can shift more weight over the front to keep the bike level during acceleration, but I think that will lead to handling problems.

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Geonerd said:

Or they can simply run slightly taller gears....

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