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View Full Version : 505sx barrel and piston on 450sx?



4stroker85
01-19-2010, 02:55 AM
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
01-19-2010, 09:04 AM
Cylinder and piston bolt right up. Its the same with the XC's. The only difference is the cylinder and piston.

Big Red Menace
01-19-2010, 07:02 PM
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.