I have a 2014 Yamaha YZ450 with 75 hours on it. I am thinking it may be time to get some motor work done to hopefully keep me going for many more hours. I contacted Race Tech to talk about some options to consider: 5 Axis valve job Port and polish Rebuild or replace the crank (apparently the 14 crank can be an issue?) Hone cylinder, new rings Does anyone have any thoughts on these mods? And does anyone have any thoughts on Race Tech or other shops they would recommend in the Southern California area? Thanks!