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Discussion Starter · #1 ·
does anyone know for sure if a '97 engine will fit without troubles, in a '91 bike? i found this engine and would like to replace the engine in the bike.
thanks in advance
 

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Need a bit more info. Are both ATV's 4x4? (I assume there are big bears? You never said).

Assuming they are both 350 4x4 Big Bears then I say no, the crank case assembleys are totaly different. This website shows the breakdowns and part numbers:

w.w.w.partforyamaha.com/pages/OemParts?aribrand=YAM
 
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