Hey Cy,
I hate to say this, But i will anyways.
You NEED to get that boat RUNNING RIGHT FIRST, and Learn to TUNE IT, BEFORE YOU MAKE ANY MODS.
When you mod a motor, makes it harder to tune (at times) Some minor mods work, but normally it has a harder needle settings.
I wouldnt go over board on porting. as if you take it to far it tends to LOOSE power. or if dont wrong.
Beleive me, Im Sure a few have messed up a sleeve/piston doing there "first" Mods.
Now if your going to get into it.
Skirting the piston some helps.
if you have a CROME CYL, DO NOT, DO NOT TOUCH IT WITH THE DREMEL BIT. It will chip the crome, and there went your sleeve. altho 800 grit sandpaper does take the edge off of it. ;D was told that by someone that made the same mistake.
And if the bottom of your sleeve is squared on bottom, taper it on a 45 degree angle, will get better flo.
can open up the inside of crank, and timing inside can be adjusted, by the opening, course the more power and rpms you get, the less torque.
So you gain some to a point, but loose some.
work on your tuning and getting that to run, before you mod.
trust me, I KNOW, and IM sure alot of others know that as well.
NT