I just put on a baja designs light kit on my 2001 YZ426 and it already weights the flywheel 11oz. so I have an uninstalled Terry Cable flyweight for sale or trade for a YZ heapipe. It cost me 160.00 for the weight and 20.00 for the flywheel puller which I will include. It's a bolt on kit,still in the original package with crankcase spacer and full instructions. I'llsell the weight and puller for 100.00 or trade for a good headpipe. E-mail me at Riverparkdude@aol.com.