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launchzone

WR450 crankshaft & YZ450 crankshaft

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Anyone know if the 2003 WR450 crankshaft is the same as the 2003 YZF450's ? Do they weigh the same? Are the part numbers different? Or will any other year WR/YZF450 crankshaft drop in the 2003 WR450 engine. Thanks for any info. on these parts.

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The crank pin and left side crank on the 03 are the same but the flywheel side of the crank is different so I would say it is a no go. The 04 and newer WR/YZ bikes have slightly larger diameter cranks! So you better just order factory crank for the 03 WR. :applause:

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Thanks for the info. I was wondering what was or if any difference because I'm looking (ebay) for a new or used crank to be sent out for stroking. I don't want to tear down my engine untill I have all the goodies ready to go. So now I'll only look at WR cranks! After I build the WR, I'll drop the original WR crank into my 04 YFZ450 quad and make that a true 450. :applause:

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