I am on hold with the ZX10 bike for want of my chief fabricator (Son Joe). He now has 5 kids and between his job and the kids it is hard for him to get over here and work. It can wait until he has time. So I decided to go back to the drag frame for the Bubs meet. The XB9 engine ran okay at Ohio but wouldnt mile an hour. Fell on its face at 134. Has run consistantly over 150. With over 50 runs on it, I am thinking that the engine is tired. It hasnt been opened up since it was built in 2007. Nothing amiss inside except a broken exhaust guide. But it might be time for some overhaul. I sent the heads out to Dan at NRHS for a freshening up and dual plugs. Will do cast iron barrels, new pistons and rings.