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Except maybe for dirt bikers. I still cop the occasional blast up through sixth on a county road; have to blow out the premix carbon, you know.

I just put the off-road stickers on my bikes for 2009. The bikes got a little Sea Foam in the tanks and the engines were started. Idaho changed the rules for off-road bikes this year. The vehicles now have to carry a "restricted" license plate instead of just a sticker. Motorcycle riders are required to have a class M endorsement. The folks with dirt bikes now have to figure out how to affix a license plate. Ditto for the ATVs. Since mine are all dual sport bikes, I just had to plant a little blue sticker in the lower left of my regular street plate.

The license plate and class M requirement did bring a little extra freedom. That run to "blow out the carbon" on a county road is now OK. You can't take it on the interstate or certain other high speed roads. You can find all the details at this link.

I had read within the last two weeks that the license plate requirement was revoked, at least for ATVs. Probably on Thumpertalk, possibly KTMtalk? I had been kidding a guy in Boise last year that he was going to have to find a spot for his plate.

I occasionally use Sea Foam also; along with Stabil. No problems so far this spring with the up-to-10% ethanol in Washington's gasoline. Float bowls are clean and jets clean as a whistle. No discoloration anywhere. OTOH, our small motor shops are jammed with lawnmowers and weedeaters that didn't get the Stabil treatment over the winter.