I've got a 89 YFM100 that needs a carburetor and a 85 YFM80 that needs a crankshaft. Can i take the carburetor off the 80cc and put it on the 100cc?? I looked the parts up and about all are the same but in the book the one thing i notice that is different is the "cutaway". The cutaway is 3.0 for the 80cc and 3.5 for the 100cc....what's the "cutaway"?

Will i need to modify the 80cc carb or will it swap right onto the 100cc??