Here in Mesa,AZ, my riding season pretty much ends as soon as the outside temp is above 90. So I look forward to the summer time to perform any repairs, upgrades, mods, or rebuilds. This summer my 06 CRF450R is getting a complete engine refresh, new head, and race tech susension. I just wanted to throw out my ideas for what I plan to install into the motor. Hopefully some of you will be running a settup close to my idea and have some input for me! Hot Rod Crank (stock stroke) OEM Piston/Rings or Maybe Wiseco OEM bearings, seals and gaskets Big Bore Thumper's head (stock replacement bolt on) Kenz Cycle mild play porting on cylinder Rekluse Z-Start clutch I ride a variety of terrain.... track, dunes, desert, forest, single track. Im looking to build a good all around strong motor, thats going to last a long time and be very reliable.