Wiseco v. WSM

[Jbeck103]

Rebuilding my motor this winter and was wondering if its worth it spending the extra money for the wiseco pistons versus WSM pistons which come with a kit I may be purchasing. Wanted to know what the wiseco has over other pistons made for banshees???

[Queppa]

Rebuilding my motor this winter and was wondering if its worth it spending the extra money for the wiseco pistons versus WSM pistons which come with a kit I may be purchasing. Wanted to know what the wiseco has over other pistons made for banshees???

I have the forged wsm with the mosfet coating. went from stock to them.

as they are lighter than stock, the engine is snappier and revs quicker when the throttle is blipped.

quality of them was very good, and all parts came with the kit as you said.

i haven't used wiseco but they have a very good name so i would say you can't go wrong there either. i got the wsm's as they came with everything and ended up much cheaper than getting oem rings from yamaha. and that even included shipping the wsms from america to australia.

i've only done about 6 hours on the bike since the wsm's went in but no troubles yet and was quite impressed with the quality of them.

 

To possibly answer your next question, i got the stock size too. as it was the bikes first rebuild with over 50 hours use on the clock. so just honed and put in the forged ones. if its a new engine or just been done recently or not done many hours since it was last done, get the clearence for the pistons checked so they don't stick when they heat up.

 

And make sure you let the bike warm up properly first before thrashing with any forged piston, as they take longer to expand and warm up than cast pistons. starting the bike straight up and hammering it will make the bike not last very long at all and you'l be rebuilding again in no time.

 

i'd say either brand should be fine. it really comes down to how you treat the bike. good oil and let it warm, and you'l never have a problem with either piston.