I see it's one of those twins that has both pistons at TDC at the same time (360 degree crank). Our 250s have 180 degree cranks and my MT-07 has a 270 degree crank. And I just found a place selling a crank for your engine that's offset by 76 degrees! Of course you'll need cam and ignition changes for that too.
http://www.mapcycle.com/performance-...ee-offset.html