First, I'm new here, but this has got to be the most helpful, friendly board I have seen. I have an '00 yz 426 for sale without the engine,carb, or wiring. The engine is now in a quad frame, and you guys have answered so many of my questions, just by reading back through the old stuff about the BK mod, and flywheel weights. The bike is in good shape. email@example.com drop me a note if your interested. I'm in southern IL if it matters.