Bare in mind the lip was at an angle pointing it at the furthest reed, not great for flow. Going for a spin shortly and local mx track tomorrow, will deliver my thoughts as they come.
I'm getting the cylinder replated shortly, and will be matching up all the ports and cleaning and casting marks. Spoken to a few very experienced tuners that have all told me not to bother with porting on these engines as long as the piston has been aligned with the bottom of the exhaust port and squish sorted, both have been done.