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According to the parts list, no, but they should be interchangeable. They just are built for their specific purpose.
Mukini
YFM 350SE Big Bear 4x49725x8x1225x10x12
gap for my 1995 big bear 350 is 0.6-0.7 mm or .024-.028 in.
1998
4 gallons
What is the spark plug gap setting for a 1987 yamaha big bear
20w-40
2 quarts
1875
.032
Yamalube 20w50 is a good choice & it holds 3L for the Yamaha big bear 350.