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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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Power valve maintenance?
Hi all,
I am in the process of installing a new piston in my wife's 200. While doing this I have looked over the power valve and from what I can see, nothing stands out as being wrong with it but I honestly am not sure. Does this thing require any regular maintenance of any sort? Is there any common problems that may occur and I can look for now? I notice that the bearings seem to move smoothly and the flapper valve comes up to about 20-30% of the exhast port window. I cannot find much about this subject. Would anyone be so kind as to enlighten me on the subject? Thanks, Eric
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Eric P. SoCal MC AMA D-37 2004 KTM 400 EXC | 2001 GG 250 MC | 2001 GG 200 EC (wife's) | 2000 Montesa Cota 315 | 1967 Lambretta Li 125 "Special" |
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Because of the limitted rotation of the valve I have found my bearings get clogged with carbon and I believe it slows and/or restricts the valve movement. Find the tech article about serviceing the valve. When you pop the bearings out you will see what I mean. I have always cleaned my bearings and they come out fine. Others here have needed to replace theirs. Others have also experienced carbon build-up on the valve but that has never been an issue for me either. Pull it apart. You'll be glad you did.
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jeff '00 XC250 (mine) LTS front and rear suspension, power valve cover, carb jet kit and rear chain glide, RB Designs head mod, BRP tall triple clamp, backyard foot-peg lowering conversion. '04 EC250 (the kids) (he can do his own mods haha!) |
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Rick 99 EC 200 06 RM 250 AMA D36 375X OTHG 375S ***Thanks for the support : Twin Air /O'Neil Racing / Race 100% / Matrix Concepts / ODI / Mika Metals |
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