Some added confusion for 'ya...
People that should know say that gasoline starts to deteriorate after a quite short time...like a couple weeks or so. I've been told that the oil in the gasoline of a premix 2-stroke accomplishes the same thing as an aftermarket stabilizer. I don't know about that.
I
DO know how well it (stabil anyway) works in 4-stroke engines. I've proven that to myself over and over.
Although it hardly ever sits that long, if my kdx is going to be dormant for over three weeks, I'll use stabil in it. It should be added
before the 'sit'...not AFTER sitting for weeks.
If you wish to drain the fuel tank, simply remove the fuel hose to the carb and open the petcock. Noone has ever convinced me that draining the tank is an effective measure against deposit buildup.
Other maintenance issues are far more important. Greasing the suspension (unitrack and swingarm), steering head bearings and wheel bearings will save you $$ later.
Checkout CDave's site for new bike prep tips:
http://justkdx.dirtrider.net