I've "bin dare dun dat" more than once for mini road racing bikes and hare scrambls. PBI Sprockets will also make custom sprokets if a few of you EX250's can arange for a batch lot order. Maybe you's can get down to a 15/30 setup on the ninja 250's, which would drop the rpm down to 5000rpm at 70 mph.
The only problem that may present itself is starting in first gear, specialy on hills. My Suzuki GS 500 [Gray] required a little more careful/gradual clutch engagement when starting out.
Last edited by redyaris; 01-01-2012 at 09:33 PM..
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