RFS matched engine crasnk case set removed from a 2004 450SX. Will fit other KTM bikes. S/N 4-594*81935*. I disassembled this engine due to a worn crank bearing race. This case set is in very good condition with no damage. All threads are in good condition. There has been some clean up around the lower oil screen as you can see in the close up photo; likely due to a stuck screen at some point. The threads are in good condition. I have included close up photos of the engine casting numbers so that you can verify fitment.