Wiseco over a cast any day, simple choice in my book. I am out of town or I would post pics of the two next to each other. Just by looking at them you can tell what one had more thought put into it. If you want to gas and go and not worry about warm up or getting the most out of your setup a cast will be fine. Most builders will put cast in your no maintenance gas and go costumers and forged in the more performance minded person’s. If you are willing to do a little warm up and want to ring every ounce of performance out of your motor then hands down forged pistons all the way. I have run nothing but Wiseco in any motor i have built for almost 10 years now. I ran them in all my bikes, cars, sleds, quads or anything I built for other people. The key is matched pairs and bore to the piston not a set size. You can feel the compression come up as they warm up, more so in 2 stroke bikes and quads but it's there in skis too. Another cause of failure often is people don't gap their rings properly---or at all then say "these pistons suck." I have solid confidence in the Wiseco products. Yes products they make a lot of things other then pistons too like forged clutch baskets and now cranks. A lot of people think HotRod cranks are Wiseco's but they are not they are two diff companies they just had a very close relationship but split ways about 1.5 years ago. The new Wiseco cranks are slowly making it to market but not too much in the PWCs yet. No matter who you go with your money goes to the same people JE, Pro-X and Wiseco are all part of PMi which in part of Dover Corporation, the parent company.
Gas and Go – cast
Top performance (with a warm-up) – Forged
