Powervalve on a '98 CR250

junkjeeps

LIFETIME SPONSOR

Nov 24, 2001

671

0

• Nov 9, 2007

• #1

What's the best way to clean the powervalve on a CR? I've got the cylinder off for a new piston/rings and the PV is carboned up pretty bad and it's movement is "sticky". Is it easily removeable? Is there any adjustments I would have to make if I pulled it out/reinstalled? I would like to pull it and bead blast it clean. Or is it just as easy to clean in place? One other question - How does the bearing for the PV get it's lubrication?

Mark

 

a454elk

Mexicutioner

LIFETIME SPONSOR

Jun 5, 2001

7,529

18

• Nov 11, 2007

• #2

Having not seen a Honda power valve, but cleaning mine on my Suzuki, I know that it really needs to come out to get it clean. Mine is in two pieces that match together and stuff gets gunked in between them. It should just come out fairly easy from the front of the motor. The vavle should have a rod that goes through it from each side. The side pivots have to come out first then the valve should slide out. But anyway, taking it out is the only way to really clean it because you already have the cylinder off, that's 3/4 of the battle.

 

Pete Payne

MX-Tech Suspension Agent

Nov 3, 2000

933

38

• Nov 11, 2007

• #3

The omegasonics parts cleaner will do wonders for it and it will not hurt anything .

 

Jasle

Sponsoring Member

Nov 27, 2001

1,358

0

• Nov 16, 2007

• #4

oven cleaner...once its removed from the bike.

 

junkjeeps

LIFETIME SPONSOR

Nov 24, 2001

671

0

• Nov 21, 2007

• Thread starter
• #5

Thanks for all the advice. I took it apart today and cleaned it. The oven cleaner worked good, but it still required a little elbow grease. It was carboned up pretty bad. I got it all back together and hope to have some free time next week to finish the top end.

 

H

hot125mod

Member

Jan 14, 2007

501

0

• Nov 21, 2007

• #6

On my Rm 125 I had to take the motor out to clean the powervalve.