i worked as a jet ski mechanic at a rental shop here. we would rebuild our 1100 triples with the wsm pistons. as soon as you have ANY kind of lean condition,air leak, or overheating situation you can kiss that top end goodbye. those pistons are junk. i personally put prolites in my 1100 engine and have it set up just like the rental machines. not only has the top end not gone down but it has been overheated due to a blocked cooling line and it still runs strong. also i put prolites in my alcohol banshee over a year ago and it still shows 140 pounds in each cylinder and i run the crap out of that bike.
the whole point of my rambling is to say GO WITH THE PROLITES!!!!! they are well worth the little extra money. :thumbsup: