Im pretty sure it will. when i was a kid a family friend gave me a dirtbike that had both the pw and yz markings on it and i believe it had a yz engine in it too, went around 50mph!
1999 2000 and 2001 engines all fit on each other
no a 250r motor will not fit in a 200x frame but it will fit in a 250r frame
What year is it? My friend has one and he has a 1980 and i have a 2005 yz 85 and the frame is not even close of being like the yz80
yes they are all the same
Size wise, it would fit, however it wont bolt into the frame if that is what you are asking.
Yes, but you will need do some fabrication to the frame in order to fit it in correctly.
no
Yes it should fit the frame not sure if tank will fit as the 91 barrel and head are bigger
Should fit it's the same generation motor.
nope
Not without modifications, no
Yes