4th digit - weight class
1 heavyweight
4 lightweight
8 sidecar
7th digit - engine displacement (cc)
H 1000 Ironhead XL
K 1340 Shovelhead
L 1340 Evolution
M 883 Evolution XL N
1100 Evolution XL
P 1200 Evolution XL
8th digit - introduction date
1 regular (September)
2 mid-year (January)
3 California special
4 Daytona (March)
11th digit - assembly plant
J Milwaukee, Wisconsin
T Tomahawk, Wisconsin
Y York, Pennsylvania
