Replacing Valve Guides Japanese Dirt Bike Ep87

[@petersenrodsandhobbies821]

Great video!
I was able to get my 09 kx250f done a few weeks back after watching your old kawi videos.
You are a hero to the rebuild community!

[@restoroosterohv]

Thank you for your kind words and support.

[@matejpetek2599]

Hat down to you sir

[@restoroosterohv]

Thank you

[@joelatkinson2080]

Awesome information!!!

[@restoroosterohv]

Thank you

[@wateronfirefk]

Awesome video!! Thank you

[@restoroosterohv]

Thank you

[@eddiestowers7636]

I’m restoring 05 yz250f. Found broken valve spring and guide. Where can I find a 4 mm driver tool. No luck for me. Help If you can. I love your videos

[@restoroosterohv]

Yeah, it kind of sucks trying to find these tools. I made mine by taking a 5 mm driver and throwing it in my lathe to bring it down to spec. You could get a larger one, chuck it up in a drill and slowly file it to size. The Yamaha part number for the valve guide remover is 90890-04111.

Would you go for stainless?

[@restoroosterohv]

I have no experience with anything other than OE

[@emil1206]

Nice video!
I have a yz250f i bought set of titanium valves i am wondering if i can lap them or not, because they have a coating.
I am thinking if i am gentle i wont damage the coat. Or is it better to leave it like it is. What do you think?

[@restoroosterohv]

Depends on the year. Early model yz250f with titanium valves are suggested to be lapped in the service manual.

[@emil1206]

Mine is 2005 but thanks!

[@restoroosterohv]

Yes, you can lap them.

[@dodgethefatherramthedaught4652]

dont lap them once that coating is gone its gone... if u must lap them, use diamond grit paste

[@restoroosterohv]

Yamaha’s procedure in the service manual is to lap the valves

[@dodgethefatherramthedaught4652]

do the guides get punched out from the top or the bottom of the head?

[@restoroosterohv]

Depends on the machine, some of them have stops. If they don’t have stops, you can push them either way.