95 yamaha banshee

[felker92]

i have a 95 yamaha banshee mint condition all stock and ran like a champ, recently when i was riding i noticed less power coming for the banshee when i was staying in a close race with the z400s. but back to the parts i took the engine out and removed the cylinders and noticed that i managed to blow out one side of each piston amazing that i was still moving with some power and sticking with the 400s but when i took em out and i realized the part that blew out was nowhere to be found? any idea where the peices could have went. 2 days ago i went out and purchased a parts banshee came with alot of after market parts and accessories such as/ new cylinders bored 0.10 over new pistons a set of weisco and another pair that are coated to take heat better, toomey t6 racing pipes new plastic boost bottle everything you can think of. Mainly though i have 2 questions.

 

1 i know the use for the boost bottle. would you recommend using it of keeping it off

 

2.any idea where the chunks of piston the blew off could have went?

 

thanks

 

 

^ that link is to a picture of the pistons.

[Sandfrk33]

Boost bottle is a waste of time. All it will do is eventually crack your intake boots.

What broke off of the pistons? Top or skirt? If it was a piece of the top, hopefully it went out the exhaust. If it was the skirt, there might be some metal floating around in the bottom of the crankcase. You can try to flush it out, but watch for any damage that could have occurred. Might be a good idea to split the cases and find out why this happened to begin with.

[Jereme6655]

oh if your absolutely sure that they didn't fall to the ground when you pulled your cylinders off the pistons then they definately slipped down into your crank case. the best thing to do is to split the cases because there may always be that one last piece of metal that you didn't think was in there......making for a REALLY bad day after your finish the rebuild

[felker92]

oh if your absolutely sure that they didn't fall to the ground when you pulled your cylinders off the pistons then they definately slipped down into your crank case. the best thing to do is to split the cases because there may always be that one last piece of metal that you didn't think was in there......making for a REALLY bad day after your finish the rebuild

 

we took it apart today and they did not slip down into the crank case..will post pics when done with rebuild