valves

[400sEXridr]

does anyone know who makes oversize valves for a 400ex? I know Kibblewhite makes them in +1 mm, but does anyone go bigger than that? Also, can a machine shop relieve the valve pockets?

[mojoe2878]

there really isnt much room to go any bigger than +1mm.
and a good machine shop should be able to do all the valve and head related work, just make sure you take it to a reputable shop.ask around at several different cycle places to get a recomendation on a good machine shop to take it to.