1999-2009 Honda TRX400EX Engine Exchange--This one is a HOT ROD!! Big Bore piston, Stroker Crankshaft, Hot Cam Camshaft! Up from a 400cc to a 460cc!!! -----------------------Brennys Motorcycle Clinic-ENGINE EXCHANGE PROGRAM--We rebuild all brands and sizes of engines. If you have anything from an Mini Trail Z50, TRX400EX to a 660 Yamaha Grizzly, or Rhino, we can rebuild your engine and get you back on the trail. Need your HiSun or similar off brand engine rebuilt? We can rebuild those as well. Call (563) 359-7222 and talk to Mark Brenny. You can also email us at email@example.com to more information on our engine rebuilds as well as what we have available for an engine exchange.