250-500cc Little end bearing doesn't fit inside wossner piston

Just putting the top end of my bike back together after seizing after 3 hours.

I purchased a wossner piston and rings for the rebuild. When trying to install the piston on the rod I just couldn't get the pin to line up with the rod end and bearing.

I'm reusing the bearing that halls supplied with the 300 conversion kit. With just the bearing on the rod end I did notice that It came out each side by a millimeter or so.

With the piston upside down I tried to sit the little bearing where it would sit if the pin was installed, however I noticed the bearing would foul the inside of the piston around the piston pin hole before getting to the point where it lined up with the holes.

So either the bearing is too wide for the wossner piston or the pistons wrong?

Any ideas? Starting to think this bike hates me!

See this post: http://www.cafehusky.com/threads/vertex-or-wossner-piston.36619/#post-356296

You need a Wossner wrist pin.

it seized after 3 hrs???

Me too. I dont get it because i have absolutely hammered my 09 for four years now. I boilded it over once, ran it out of coolant but rode ot home, had my clutch cable go out on a ride once and was forced to slam gears to get home, completely drowned it in a river. Thing just keeps going. I want to upgrade but the bike has been absolutely indestructible. Thats why i am dumbfounded when hearing these stories.

How many have seized, really? I know that there have been a couple but I don't remember seeing an inordinate amount of threads. I've seen a couple destroyed 125/144/165s too...

I think that the leaky air boot may have gotten a few, but the rest are probably just typical user error or age-related stuff like bad jetting, intake leaks, overheat, etc.

Bought new in December 2013. 46 hours on clock now. Ran it out of coolant once. Ran it at dunes with big tear in intake boot (didn't suck sand but sucked all sorts of air making it ultra lean). Not seized yet.