Apollo 250 exhaust valve and piston

Ianprib · 06-07-2021, 09:37 PM

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.

**JerryHawk250** · 06-08-2021, 09:06 AM

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

alex_in_az · 06-08-2021, 01:07 PM

Quote:

Originally Posted by JerryHawk250

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?

**JerryHawk250** · 06-08-2021, 01:33 PM

Quote:

Originally Posted by alex_in_az

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.

Ianprib · 06-08-2021, 08:46 PM

Quote:

Originally Posted by JerryHawk250

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

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

**JerryHawk250** · 06-09-2021, 09:40 AM

Quote:

Originally Posted by Ianprib

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.

alex_in_az · 06-09-2021, 04:36 PM

Quote:

Originally Posted by JerryHawk250

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?

**JerryHawk250** · 06-09-2021, 04:48 PM

Quote:

Originally Posted by alex_in_az

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

06-07-2021, 09:37 PM	#1
Ianprib Join Date: May 2021 Posts: 4	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.
	0

06-08-2021, 09:06 AM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,713	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 __________________ 2024 Linhai 300 ATV 4x4 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
	1