Honda 400ex head porting We highly recommend getting a valve job at the same time the head is being ported. FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE Steel intake and exhaust valves Inner and oute View full details Oct 5, 2011 · A non ported 11:1 440 with slip on, stage 2 hot cams, and propoperly jetted carb makes around 34hp, a stock 400ex is 27hp. my uncle just bought a honda 400ex & it had a bad head gasket leak multiple holes were stripped from head bolts to valve cover bolts but we'll get th Head Porting – CT Racing has done significant amounts of flow bench and dyno testing to offer you the best port layout for your application. Mar 15, 2010 · hi I tore down my 400ex motor after about 7 years of abuse everything looked good in the head and overall it was pretty clean. I want to bore it to a 416 kit and get the head ported for more power, does anyone know of a really good builder/shop to take this to?. Here's a link to help you understand the mechanics of porting. I want to bore it to a 416 kit and get the head ported for more power, does anyone know of a really good builder/shop to take this to? FITS ALL HONDA 400EX 400X AND XR400R MODELS AND YEARS - THE ONLY TRULY COMPLETE REBUILD KIT ONLINE Steel intake and exhaust valves Inner and oute View full details Oct 5, 2011 · A non ported 11:1 440 with slip on, stage 2 hot cams, and propoperly jetted carb makes around 34hp, a stock 400ex is 27hp. Designed for both stock and modified engines, this brand new aftermarket product is engineered to elevate your ride's performance to new heights. Jan 15, 2014 · - Honda TRX 400EX - fully built 416cc motor and full XC racing setup for fast trail riding and hill climbing - Kawasaki Prairie 650 - work quad for around our property and main quad for the wife to ride Unlock the full potential of your Honda 400EX, 400X, or XR400R with our top-of-the-line Ported Cylinder Head and Valve Assembly. Head porting generaly adds power in the upper rpm range, the 400 is a long stroke motor, it's power band is in the low to mid rpm range. udpz nrzt jkyi shsjdq hqmut ywvm evl ruxm tqgm ovagvmp scobxgm lukjqbp nby ntka uqjp