Hello friends !
Finnaly I've recived the piston. While they still fix the cylinder, I am reading carburation manuals and cleaning the Mikuni. I'll buy carburetor jet kit from 180 to 250.
I have noticed that the Yamaha piston rings are different while the Wossner ones are the same:
The Small End Bearing is 17mm ( the one that was put ) but the original bearing for Yamaha piston is 19.5 mm, so is very important replace it ?
And I see that the Wossner piston does not have holes that lubricate the gudgeon pin:
( it might be a good idea to do them? although I do not think so ) )
I have a base gasket but the Genuine Base Gasket it is made of metal (aluminium?) , so It is highly recommended put the metal one ?
uf a lot of questions but thank you in advance .