has anybody ever used this

spend the extra 20 bucks and get the wiseco kit. it is soooo much better and with all the problems you've been having, something with a little more durability would be a good idea
 
yeah thats what i figured maybe ill go through the garage and do some scraping to get some money i got a buch of electric motors and lawnmowers and sh*t to throw away
 
f it i just dropped off the jug to yamaha and ordered a wiseco piston top end gaskets you know the works. it had to be done. pissed my old lady off but she just doesnt understand
 
f it i just dropped off the jug to yamaha and ordered a wiseco piston top end gaskets you know the works. it had to be done. pissed my old lady off but she just doesnt understand

Hmmm prob too late for this but.... WSM kits use cast pistons, so yeah ya get what ya pay for, but my local shop (30+ years exp) guy told me he's installed hundreds of them and never had a problem.