I see you have a digital caliper...….
Take a piece of paper and map the cylinder remove the map and make the calculations....
I want to know how wide your exhaust port is and how high it is dead middle at the inner part of the cylinder..
Then the exhaust port measurements on the outter part of the cylinder..
Then I want to know the distance from the height of the exhaust port to the base of the cylinder not the bottom of the skirt...You can see the line that differentiates dome from cylinder..
I also want to know the height of the transferports from cylinder base to transferport top...
Last measurement is the full width of the transferports
I have a 44mm cylinder that's casted as 44TM78...TM cylinders are performance oriented cylinders..
The numbers on the cylinder I have are...
Exhaust port inner : 23.54mm's wide x 9.35mm's high
Exhaust port outter : 25.08mm's wide x 16.20mm's high
Top of Exhaust port to cylinder lip : 24.69mm's
Transferport height from cylinder base to T-Port top : 29.41mm's
Transferport width is : 19.27mm's wide
3rd boost port height from cylinder base to BP top is : 29.41mm's
3rd boostport width is : 9.38mm's wide
Theres plenty room for improvement even with this cylinder that's supposedly already casted for more performance...LOL
I'd make the Exhaust port inner 25.50mm's wide by 10.5mm's high
The exhaust port outter Id go 26mms wide by 20mm's high
Id widen the transferport to 22mm's thin down the center divider and polish them..
I'd raise the 3rd boost port .10" higher than the transferports..
When done the TM cylinder would be quite a ripper....LOL