505sx barrel and piston on 450sx?

[4stroker85]

I can get a smokin deal on '09 runout 450sx, and there are no 505sx left..

can i fit the barrel and piston from the 505 to the 450? is the head different? is the crank different?

thanks, mark

[patrickj75]

Cylinder and piston bolt right up. Its the same with the XC's. The only difference is the cylinder and piston.

[Big Red Menace]

Yes the cylinder fits but the 450sx has a 19mm wrist pin and the 505sx has a 20mm wrist pin. So to turn a 450 into a 505 you will need to change the crankshaft. More specifically the rod. I've heard that thumper racing has had CP make them a conversion piston.