250-500cc 11 WR250 power valve

Just pulled these from my 250. A mistake at the factory? They should both be the same part (the one on the bottom) My guess is the one on the top is from a 300?? Anyone have them out and know what they look like?

I had the same thing on my WR250 I ordered a new one form Hall's to replace it so they were the same.

Those Italians really didn't like working under the Germans ownership...

sloppy work

Do you think that they might get worn over time? Odd how it only happend on one side just like my bike.

You could tell if they were. Worn as the part out rubs in would be shaped like that too.

No my guess is a bloke worked on the 300's then worked on the, 250 and thought the chamferd one lived there.

Or low on parts so they stretched out the production by putting one form the300 in Not many would notice a problem until they strip it down.

I agree, I picked up the bike used in the fall. It had 300 mi on the ODO and was sitting for awhile. It had a louder than normal PV "knock" on the right side, so I pulled it apart and found the different valve. The bushing didn't look that worn so I'm not sure why it was louder.
If you look in the bore where the bushing goes, it looks like the end of the valve was knocking against the cylinder like maybe it was pushed in too far? No way that's wear. I was wondering if anyone with a 300 had them out and know what they look like.

So do 300's have the chamferd valves stock?

I would off thought if the 300 is a bored out 250 then the valves are chamfered for clearance of the piston.
I don't actually know tho. It's all a guess.

The funny thing is the bike that I had that problem with was an 08, 3 years of doing it wrong between you r bike and mine, hard to believe but anything is possible.

Maybe that is how it is supposed to be. I find it rather strange that a mistake was made more than once and also the first year for the WR300 was 2009. Parts breakdowns shows they should both be the same on the 250 and a different part number for the 300.

The plot thickens.

The port does not fully close with the chamfered valve. I asked halls to compare the two part numbers but they didn't have the 300 one in stock. Maybe the 300 port is different?