Sam 4 Posted May 15, 2007 Can anyone tell me the size of the standard XU10J4RS inlet and exhaust valves? Diameter, length & stem size? In an attempt to build a bullet proof lump I am going to be changing them to deal with the heat. Thanks Share this post Link to post Share on other sites
Sandy 191 Posted May 15, 2007 116.4mm long 6mm stem 34.0mm head diameter inlet (XU7 and XU10 are 34.6mm) 29.8mm head diameter exh (XU7 and XU10 are 29.5mm) Share this post Link to post Share on other sites
