2002-2007 CR250 Power Valve REBUILD - STEP BY STEP
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- čas přidán 21. 08. 2024
- Step by step tutorial of how to disassemble, clean, and rebuild a 2002-2007 Honda CR250 Exhaust Valve / Power Valve / RC Valve. It's a great idea to do this every time you do the top end, or sooner to ensure proper function and power delivery of your bike!
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Greg, another Greg here. I am doing a top end rebuild on an 04 (it's first top end) and the pv shaft is stuck in the cylinder. This helped immensely and I will be using this video to remove, clean, and reinstall the valve! Thanks!
YES! This is so awesome to hear Greg. Great to meet you. I had the SAME issue with mine and needed to share the advice for others like yourself out there. Let me know if you have any questions on the rebuild. Thanks for the feedback!
using a medium small flat blade screw driver (i use my finger nail) thru the exhaust port(see @ 9:35), gently separate the two power valve halves where the shaft goes thru . then you can pull the actuator shaft out with relative ease. its kinda of like the Chinese finger cuff trap. use the same technique when reinstalling the shaft . it took me a few times to develop the technique
Thanks for leaving that technique! That part can be such a pain. Much appreciated dude 🙌🏼💨
Another great video! Thanks Greg!
Thanks London!
Excellent video!
Thanks Cody!
A great good video
I used easy off oven cleaner, and it worked well. You still need a small knife or a pic works to remove all the carbon. I used my fingers to get the height correct. Some methods let the valve open to much.
I've heard the oven cleaner method works great too, just never have any laying around haha
The 05-07 is different
Has a one piece flap design instead of two!
he if you wane clean the carbon easy and good like new with out to much trouble try to soak them in some mister muscle oven cleaner the foam one be careful use eye protection !!! its a must if its not aluminium you can soak them pretty good in it watch out for alu parts tho cause the oven cleaner can eat into it so don't soak those to long it works like a charm for me always when doing my agr valve on my diesel car or my 2 stroke 100cc scooter exhaust rinse it with water or shrub it a little and falls of like mud
Have you tried Berryman chem dip for removing the carbon? Their carb and throttle body cleaner is great too
I've actually never heard of it! I will have to look into it for sure, anything to help break down that hard carbon is a win!
I wonder if anyone has fixed the issues with the ignition mapping and PV control on these engines.
I couldn't tell you actually!
03 you can’t go through the exhaust port. I went through the cylinder side
I thought the 03-04 were the same and I was able to get mine through the exhaust port, weird!!
@@GregHitchko I’ve never been able to do it that way. I find it weird as well. Through the cylinder they practically fall in. I think it’s because mine don’t have the 2 cut outs on the flaps. O3 is just solid. I’ve noticed a lot of small differences over the years. Like fork guards are different hardware is different. Exhaust port is different on some and also reed set up.
@@bradleycorson5737 Honda trying to squeeze what ever improvements out they could before making the complete switch to 4 strokes probably lol!
My 03 won't go out thru the exhaust either. The exhaust is round on the 03. The 04 is an oval.
Hey Greg looking to see if it’s possible to remove and replace the seal without having to disassemble the whole valve assembly any insight is greatly appreciated TIA
Hmmm you might be able to. If you can get a small pick to grab it out, I don't see why you wouldn't be able to replace it without removing the whole shaft!
Do I need the head removed on my 02 to get these out? or can i get them through the exhaust port?
You should be able to get them through the exhaust port if you rotate them out! It is easier to get them out through the cylinder, but I put them in through the exhaust port which means they should be able to come out through that way as well.
Where can i buy the little seal?
Hola buenas tengo una duda sobre mi cr 250 2004 es que las balbulas rc cuando suben no se quedan escondidas sino que sesigun biendo por la mira pero si intentes drle con la mano pa dejarlas escondidas es imposible no se esconden
De donde eres ?
Do you need to remove cylinder head to remove the shaft ?
No
I used a slide hammer, came right out
How did you attach it to the shaft?
@@GregHitchko my slide hammer came with a an attachment that's like a 2 finger claw. I put a washer and the nut on the shaft( like you did in the video). Took a few tries, some cursing, and a few more tries and it came right out!
@@331moto oh no way! Could you drop a link in a comment to it?
@@GregHitchko I made an adaptor to fit mine. Cut a thread one end to fit the slide hammer. Drill and tap it the other end with the thread on the PV shaft and screw it on, then screw the slide hammer on to the adaptor.
Hey dame tu wasa yo Nesito un silidro
I don't understand!