Father & Son Bikes

[bcboy4ca]

Originally Posted by SpudRider

A happy wife is a very good thing.

That is some major damage to your WR250F. Did either the valve spring, or the valve stem break, allowing the valve to drop?

Not entirely sure, I did have it apart a while ago because it was smoking so I replaced the valve seals and rings. I am thinking that I may have not installed the valve spring retainers correctly and one dropped, so it very well could be my fault. Live and learn I guess lol

[SpudRider]

It's impossible to know for sure. Those little engines rev very high. I know the engine in my Honda CRF250X will rev to 12,000 rpms.

[bcboy4ca]

These will rev to 13,500 but when it let go I was crusing between trails on the forest service road, well below the RPM limit. It could have been worse, earlier in the day we were down in the bottom of a nasty trail, slick clay like mud, roots, ruts etc. if it would have let go down there I probably would have left it behind

[SpudRider]

I'm glad you got the bike home. Even if you don't repair it, you still have a lot of good parts to use, sell, et cetera.

[Bruce's]

I have a 2006 yz450f in the garage I bought with a dropped valve ,I waited and waited and finally found a good used head,valves,cams etc for $350 ,brand new cylinder kit is only $20.00 more than just replacing the piston so about $280 my cost( my cylinder was fine ,but not worth it for $20.00) point is if you look and are lucky you might find another serviceable head on the cheap .

[bcboy4ca]

Originally Posted by Bruce's

I have a 2006 yz450f in the garage I bought with a dropped valve ,I waited and waited and finally found a good used head,valves,cams etc for $350 ,brand new cylinder kit is only $20.00 more than just replacing the piston so about $280 my cost( my cylinder was fine ,but not worth it for $20.00) point is if you look and are lucky you might find another serviceable head on the cheap .

I don't have any plans to get rid of it, just parked it in the garage and will keep my eyes open for the parts I need, hopefully at a good price.

[Weldangrind]

Originally Posted by bcboy4ca

I have also been doing a bit of single track riding at Tamihi and Vedder, LOVE IT, however on my last outing this happened....

You have too many valves in there; I think dirt bikes are only supposed to have two valves. I spotted the problem right away, because I'm technical like that.

Sorry to hear about the dropped valve. Have you read anything about swapping to stainless valves? Perhaps they're stronger. I bet there's a forum discussion about that somewhere.

Good score on the two-smoke! It's nicely equipped, and you'll love that wide ratio trans. You're not likely to drop a valve in it, either.

[Weldangrind]

Originally Posted by bcboy4ca

I don't have any plans to get rid of it, just parked it in the garage and will keep my eyes open for the parts I need, hopefully at a good price.

Even with our sucky dollar, it pays to shop south of the border. Try some of the major online stores, and see if you can score gaskets, etc that way.

[cheesy]

Originally Posted by Weldangrind

You have too many valves in there; I think dirt bikes are only supposed to have two valves. I spotted the problem right away, because I'm technical like that.

Yeah, I thought I was looking at an Audi 1.8T cylinder head.

[bcboy4ca]

Originally Posted by Weldangrind

You have too many valves in there; I think dirt bikes are only supposed to have two valves. I spotted the problem right away, because I'm technical like that.

Sorry to hear about the dropped valve. Have you read anything about swapping to stainless valves? Perhaps they're stronger. I bet there's a forum discussion about that somewhere.

Good score on the two-smoke! It's nicely equipped, and you'll love that wide ratio trans. You're not likely to drop a valve in it, either.

When I rebuild the head I will be switching over the stainless steel valves, they are a recommended upgrade.

Originally Posted by Weldangrind

Even with our sucky dollar, it pays to shop south of the border. Try some of the major online stores, and see if you can score gaskets, etc that way.

I had to replace the stator in this bike a couple months ago and there are no aftermarket options for my year so I need OEM. Even with our crappy dollar I saved about $85 ordering it from Partzilla.

If the '93 works out I will take my time rebuilding the '02 and do it right. I am also thinking of looking into possibly converting it to a 2-stroke if possible. We will see, not getting rid of it but not in a rush to fix it either.

[Bruce's]

Does it not have titanium valves like mine did ?

[bcboy4ca]

Originally Posted by Bruce's

Does it not have titanium valves like mine did ?

Yes it did, my piston thought they were tasty

[Bruce's]

I might have a few for you ,I don't remember which one was eaten by my piston but the rest were serviceable .Besides ,they are only about $600.00 if you bend over nicely .

[Weldangrind]

Originally Posted by bcboy4ca

Even with our crappy dollar I saved about $85 ordering it from Partzilla.

Tell me about it! I just bought gas across the border tonight, and paid $0.92 per litre after conversion.

Do you have stuff shipped to Sumas?

[bcboy4ca]

Originally Posted by Weldangrind

Tell me about it! I just bought gas across the border tonight, and paid $0.92 per litre after conversion.

Do you have stuff shipped to Sumas?

No I had it shipped to my door because I still haven't got around to getting a passport, even though I have been saying for years that I should.