250-500cc 250-300 piston change hours

How long do you run a piston in a WR250-300 for enduro, and recreational riding.
I'm not riding it hard and not a lot of WOT, I'm at around 18hours on it it doesn't show any blow by, good compression and no problems what so ever.

Regards, Bart

I have 84 hrs on 06 WR250 still OK. I don't ride hard, I'm an old guy. Will need to change it soon. I haven't done a compression check but it runs fine and starts 1st kick.

You can inspect the piston by removing the pipe and the reeds. I've heard that the intake side will show wear sooner but I ride technical single track so it's rarely on the pipe for long periods and is still like new.(unlike the 125 I had as a kid that was rarely not on the pipe)

I think you have made and error here ! 15-20 hours... the 1800 miles seem ok.
From my experience, 150 hours with a piston is ok for this bulletproofs motor.

Yes that would be averaging 90-120 miles per hour. Maybe 15-20 tanks of fuel.

I was going to ask you how you can ride that fast! 90 to 120 mph in the woods would be impressive!