If your following DRQbert on facebook why are you asking questions here??....... send him a message.   He loves to talk to someone who doesn't know much.

I personally would not try to lighten a piston by taken away material around the pin or the skirt. Just going to make it weak.

I appreciate everyone's comments

Will post up some more pictures shortly to stimulate further conversation :-)

More pistons pics

Looks like somebody's been stalking Q   

From what I understand, and that is not a lot, there are a couple advantages to doing the window but from what I think I remember there was no real HP gain or reliability improvements.  (supposedly helps with cooling or something?)

On the skirt cuts front/rear skirt cuts this can affect timing/power curve but you need to watch for skirt cracking & flexing which will reduce the number of hours the piston can run reliably.

The other thing is how is your porting set up and what pipe are you running will have effect if these mods will be beneficial or they're magic fairy dust.

Motor Geek would be the man to talk more about the real scientific pro &/or cons of doing these mods.

Any more comments?

wiseco generally isnt known for their brilliant piston designs. cutting the whole side of the piston out isnt the best idea imo. alot of times what happens is youll end up with a short circuit from the transfers to exhaust. it also create a large cavity beteen the piston and cylinder wall. removing material just out of the rear portion would be better