Dear Ralph: What is the recommended mileage for changing hyfax and changing chain case lube? Sondra and Bob There really isn’t a specified mileage...

Dear Ralph:
What is the recommended mileage for changing hyfax and changing chain case lube? Sondra and Bob

There really isn’t a specified mileage to replace hyfax, it is done on an “as needed” basis. Each model has a specification (usually listed in the owner’s manual) of minimum acceptable thickness. Whatever this number is, take an open end wrench of that dimension and run it along the length of the hyfax. If the wrench drops onto and around the hyfax at any point, then you know it has reached the spec. For example, many Polaris models specify a minimum hyfax thickness of 7/16” or 1.1cm. I like some cushion, so I’d take a 12mm wrench and run it along the length of the hyfax. If it drops onto the thickness at any point, you know you’re right at the wear limit.
As for chaincase lube, I usually figure 3,000 miles or at the end of every season. Polaris specifies every 2,000 miles, so for most riders this would be at the end of every season. It’s more to remove the contaminants (wear from the parts and water ingestion) than it is due to oil breakdown or lack of lubrication. The chain and gears and tension should also be checked at this time to avoid obvious problems, as well. Inspect the link plates on the chain, the teeth of the gears and set the tension no more than finger tight.

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