450 Piston and Rings

I am in the process of changing my piston and rings. It appears that the new set of rings are bad. The shoulders on the oil ring are non existent so the outer rings will not stay in. Was able to get all the rings in the piston once then it was so tight it would not move in the cylinder. This was a Wiseco piston kit. Has anybody else had this problem and what was the solution? :cry:

I am in the process of changing my piston and rings. It appears that the new set of rings are bad. The shoulders on the oil ring are non existent so the outer rings will not stay in. Was able to get all the rings in the piston once then it was so tight it would not move in the cylinder. This was a Wiseco piston kit. Has anybody else had this problem and what was the solution? :cry:

just curious...did you try installing the cylinder with the piston on the rod? The oil rings are VERY fragile. Sounds like possibly one of the oil rings came out of place while installing. Tdub

Buy OEM Piston and rings Problem solved. I'm done my piston and rings lots in my 450 and not a problem.

Buy OEM Piston and rings Problem solved. I'm done my piston and rings lots in my 450 and not a problem.

HUH??

just curious...did you try installing the cylinder with the piston on the rod? The oil rings are VERY fragile. Sounds like possibly one of the oil rings came out of place while installing. Tdub

I tried both ways. First with the piston on the rod. When that didn't work, I removed the piston from the rod. No luck either way.

Buy OEM Piston and rings Problem solved. I'm done my piston and rings lots in my 450 and not a problem.

I wanted to go OEM but after a month on back order I went aftermarket. I guess there is a reason they are back order??

They shouldn't be on back order (From Yamaha Canada). I ordered mine and within the week they had it, but out of the US it could be different. I just got my motor back together a few weeks ago. I wouldn't put in aftermarket in my motor I just dont trust wiseco product I have had back luck with them in the past. The OEM parts have proved themselves to me that they work. I would rather spend them extra money to make it right.

I'm guessing you checked the ring end gaps in the cylinder to be sure they sent the right size set?

Well, all is well. They sent the wrong rings. Everything back together and it runs awesome again. Thanks for the advice everybody!! I will only go OEM from here on out. :cry:

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