My 250R Dyno Runs.

[DDQ]

Blue line is un-ported stock cylinder and stock head with an ESR pipe.

Green line is ported cylinder with a cut head and ESR pipe.

Red line is ported cylinder with a cut head and Bill's pipe.
The Bill's pipe did not do near as well as I hoped. The porting and dyno run was done by my banshee motor builder in Moyock, NC and was his first time porting a 250 cylinder. I am very pleased.

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[DDQ]

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[keister]

Very cool. Thanks for posting!