| Tail Number / N-Number | N81JM |
| Manufacturer | MASON JOHN H |
| Model | KR-2 |
| Year Built | 1981 |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | VOLKSWAGEN |
| Engine Model | CONVERSION |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 36 hp (27 kW) |
| Type of Registrant | Individual |
| Owner Name | SACK GARY N |
| Street | PO BOX 6082 |
| City | EUREKA |
| State | CA |
| Zip Code | 95501 |
| Region | Western-Pacific |
| County | Humboldt County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1982-06-04 |
| Certificate Issue Date | 1987-06-05 |
| Last Action Date | 2020-02-13 |
| Expiration Date | 2027-07-31 |
| Status | Valid Registration |
| Mode S Code | 52603727 |
| Mode S Code Hex | AB07D7 |