y426 or yz400?

How can i tell whether my bike is a 426 or 400 without lookin at the vin number, and will a yz426f base and head gasket fit a a 400 or no

On the cylinder should be the engine size stamped in. Sitting on bike it would be on your right side.

Does anyone kno if a yz426 base and head gasket will fit a on a yz400

Both the 400 & 426 part numbers are the same for both the head & cylinder gaskets.


1998 400 -- items 14 & 29


2001 426 -- items13 & 28

So a yz426 head gasket will fit on my yz400???

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