I have a 97 XR 600 that sucked the choke plate. Since then I had the top end redone, piston, rings, valves, springs, the whole 9 yards. I also added a Stage 1 hot cam, changed to stock carb to a new Mikuni flat side 41mm carb, and had the beast jetted. When all was said and done, I picked up just over 5 hp on the dyno! I was all teeth for 25.25 miles. Then the engine siezed!! After working with a local shop, and tearing the thing apart, the oil filter screen was clogged and wrapped with some weird junk. Well, the top end was starved for oil all the work I just had done is toast. Has anyone ever had this problem, or, I hate to say it, but did the shop screw up and drop something in the top? I didn't even know that screen even existed. Am I being taken? I have this sort of inherent lack of trust when it comes to mechanics, but they came pretty well recommeded. They also have offered to replace everything and put my bike back together for no labor, all I have to do is pay for parts. Any help for a newbie?