Yeah when it comes to racing there is nothing like a 2 stroke. All my older PWC were 2 stroke. The 4 stokes cant touch them out of the hole but due to environmentalist they are all 4 stoke now.

Oh well, I'm more into the long haul now days and not hole shot so it doesnt matter much.
I have done my share of rebuilding 2 stoke in the day. Yeah easy to pull a head and change rings/pistons and you are g2g with some new reads. The engine in my 2003 Honda Aquatrax PWC is nothing less than a 4 stroke fuel injected car engine. I bought it with a cracked head and fix it myself but the damn thing was nothing like they use to be. here is a picture or it torn apart.
<img src="http://forums.steroid.com/attachment.php?attachmentid=137645"/>
<img src="http://forums.steroid.com/attachment.php?attachmentid=137646"/>