I think many people make it more expensive to run 2-strokes then they really should be. You don't need to run an ultra expensive synthetic 2t oil. Buy some outboard oil and run a forged piston. Parting out a 426 does not make much sense anymore, maybe a few years ago but not now. Bikes are expensive to maintain as is but switching to another old bike, even if its a 2t, isn't necessarily going to equate to cheaper maintenance. If you bought a YZ or another brand 02+ for cheap, say a grand then it would make sense. You could factor in a new replated cylinder, even a crank, some new bearings and have a bike that will last a long long time with nothing more than piston changes every 100 hours or so.