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View Full Version : yfz450 to wr450 ?


newbtojumping33
10-14-2010, 08:25 AM
What parts do I need and what will be my gains from switching over to the wr
slainwarrior
10-14-2010, 01:33 PM
i helped my buddy build his 07 motor it was either an 03 or 04 wr crank and piston.. its drop in no other mods needed... changes the displacement to 470 or something like that for the earlier year yfzs it makes them a true 450.. its a lighter crank and piston and it deff made a big difference
eotrx400ex
10-17-2010, 01:46 PM
Originally posted by slainwarrior
i helped my buddy build his 07 motor it was either an 03 or 04 wr crank and piston.. its drop in no other mods needed... changes the displacement to 470 or something like that for the earlier year yfzs it makes them a true 450.. its a lighter crank and piston and it deff made a big difference this apply if using Hot Rod's WR crank? curious since i found out my 04 has one