[Mudgod14]

I have an 84 yfm225 and an 86 yfm 250.. the 225 needs a piston.. can i swap the whole jug from the 250 straight onto the 225 lower end ?

 

[DaBomb6988]

Isn't a yfm a yamaha?

 

[alloutdoors]

I suggest just going to a Yamaha dealer and see if the service manager will share the engine/block specifications, i.e., do they share a similar block, etc. with you.

 

[Mudgod14]

Yes its a yamaha moto 4

 

[XplicitRacing6]

Lol I saw Moto 4 so I'm posting a pic of the new project (this has nothing to do with anything lol)

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