125-200cc OEM needle bearing and Wossner piston

Hi,

I'm rebuliding my top end (WR125) and about to purchase a Wossner piston.
I read here on some threads that people had problems with fitting the OEM needle bearing to Wossner piston. Is this relevant for 125cc as well? Someone had this problem on 125 recently with Wossner?
I'll be happy to hear your opinions.

Thanks!

No problem on my 360 or 250 with stock bearings and wossner pistons, try it before you mount it in the bike if it dont fit buy one that does only £10 ish

I'm buying it on ebay so I can't check it before buying.
The sizes of the OEM bearing are ø15xØ19x17,3 mm, I'm not sure what the 17,3 stand for (bearing length?)..
According to the seller it will fit 15x19x17 so I want to be sure it is ok.

Whats the clearance on the piston for the bearing?
All i can say is buy the piston an if stock bearing doesnt fit buy another thats narrower.