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Yz133, you are correct, for now they are just replacing parts with what I assume are the same stuff that failed. Unless they have quietly made some design upgrades. Guess we'll see how the new stuff holds up...

Excalibur, never said they were regional. Talk to the factory, the valve issues are all over the country. Random, yes. Also very real.

I can verify the valve spring/seat issue. Two brand new KXs less than 10 hrs, both same problem. Broke both in per normal before running them hard, but both with same issue The positive news is that Factory has stood behind the bikes and paid for parts and repairs. Their factory customer support puts Yamaha to shame Still, would prefer...

We have been with JM from the start and I can attest to the last 2 posts. John Mitchell knows his stuff, has been around a long time, and most importantly, if you do what he recommends, he will stand by you, as he always has for us. Stand up guy, sets high standards for all in his shop