i just bought a 93' XR600R a couple months ago. unfortunately ...to make a looong story short ... it burned over 1 qt. of oil in 120 miles and locked up on me. i have pulled the motor out and pulled the the top end off to find the rod seized on the crank. i also see some pitting on some of the trans gears , but i havent split the cases yet. i really love this bike and its got every aftermarket accesary you can add (i.e. Scotts , excels , stator , DS kit etc.. ). i want to rebuild everything myself ... the labor isnt a problem for me unless there are some special tools ill need. ill let the machine shop handle the head , cylinder and crank being pressed into the left side half lol. but i can do the rest. first off , is this just a dumb idea? should i just hunt for a used motor ? i wanna race a SCORE race next year , and want it to be bullet proof. just looking for some advice , thanks.