2021 Yamaha Mountain Max 800 — Should You Buy One?
Typical asking price: $9,000–$13,000. There are 2 high-severity known issues you need to know before handing over a check.
Kestrel Take
Yamaha's return to a two-stroke mountain sled (built with Arctic Cat, sharing the 794 C-TEC2) after years of four-strokes — light and capable for deep snow. It carries the two-stroke and Arctic-Cat-network considerations rather than Yamaha's usual four-stroke durability. Verify support and engine history.
What we checked
Not checked against public records
Snowmobiles fall to the Consumer Product Safety Commission rather than NHTSA. It publishes recalls but no owner-complaint record, and only a minority of campaigns name a model year we can match with confidence. What follows is our own write-up, and it has not been reconciled against an official record. Treat it as a starting point, not a verdict.
Known Issues for the 2021 Yamaha Mountain Max 800
Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.
The shared C-TEC2 two-stroke needs periodic top-end service; verify hours and history.
Repair cost (estimate): $400-$1,500
Source: not yet checked against public records.
Inspect the belt and clutch.
Repair cost (estimate): $100-$450
Source: not yet checked against public records.
Parts and service span Yamaha and Arctic Cat networks; verify local support.
Repair cost: Not yet priced
Source: not yet checked against public records.
Inspect the paddle track and running gear.
Repair cost (estimate): $200-$1,000
Source: not yet checked against public records.
Walk-Away Red Flags
- ✗No top-end history
- ✗Glazed belt
- ✗No local support
- ✗Running-gear damage
Good Signs
- ✓Documented engine and belt service
- ✓Local support available
- ✓Good running gear, reasonable hours
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Known issues on this page are based on documented owner reports, NHTSA complaints, class-action records, and manufacturer technical service bulletins. Individual vehicles vary. A pre-purchase inspection by a trusted mechanic is always worth doing.
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