Apollo 250 exhaust valve and piston
 

Tore down the motor on my apollo 250rx and found that my exhaust valve was bent and began to make contact with the piston. Anyone have any links to valves and pistons that would fit? No info on them when I try to search the internet.

Verify the size of the bore. It should be 65.5 mm if an older engine. the newer engines will be 69mm. If 65.5 mm then any piston for a 2003-19 Honda Crf230f will fit including the Wiseco 11:1 piston. The same with the valves but verify your measurements to make sure.
https://www.ebay.com/itm/382670730611

any idea when the change over happened? is it reflected in the engine number at all?

I think they switch somewhere in mid 2020. If it has the oil site glass it should be the 223cc, if no site glass it will be a 229cc. My X22R is a 223cc and my Ghost is a 229cc.

I have the newer 2020 with the sight glass. You say its a 223cc piston?

So yours is the same as my X22R which would be 223cc. Just measure the bore to verify.

so I'm guessing there's no way to fit the 223 jug and piston to the 229 to get 254cc?

There are Big bore kits that will get you to about 240cc's.
https://www.ebay.com/sch/i.html?_fro...e+kit&_sacat=0