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Fly wheels compatability between older and newer BF40s?

M

mitchbuck

Contributing Member
Are there any differences in the fly wheels between the older model #
31100-ZV5-680ZA ('90s) versus the newer model # 31100-ZV5-681ZA (2000s) for Honda BF40/50s? Looking at photos online it appears that it may just be cosmetic changes as the bolt hole, key hole, and magnets appear to be the same? Do the numbers engraved on the inside of the fly wheel mean anything? I am wondering if they can used interchangeably with no issues. Thanks!
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Can be used interchangeably for all the carbureted 40's or 50's. If you can use the 681za, it is the more current part.

The older ones' magnets tended to delaminate.

Mike










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