Digits 1,2,3 are World, Manufacturer, Identifier
Digits 4,5,6,7,8 are Vehicle descriptor Section
Digit 9 is the check digit
Digit 10 is the Year code
Digit 11 is the Factory code
Digits 12,13,14,15,16,17 are the Vehicle Identification Sequence

A very shortened version:JS1NP41A9H2101368
digit-description (code)
1-Japan (J),
2-Suzuki (S),
3-Motorcycle (1 or A),
4-Single cylinder sport/street (N),
5-600-699cc (P),
6-4 stroke single (4),
7-model version first version uses 1,
8-model version first version uses 1,2,3,4,5,6,7,8,9,A? 10th version?
9-accuracy check digit, verifying the previous VIN numbers ?
10-Year Code
 86(G), 87(H), 88(J), 89(K),
 90(L), 91(M), 92(N), 93(P), 94(R), 95(S), 96(T), 97(V), 98(W), 99(X),
 00(Y), 01(K1), 02(K2), 03(K3), 04(K4), 05(K5), 06(K6), 07(K7), 08(K8 ), 09(K9),
 10(A), 11(B), 12(C), 13(D), 14(E), 15(F)
11-Factory Code  2
12 thru 17-Serial Number

By the code, yours is a '87.

Only difference between a P or an F is the handlebar/riser and cables.

P is the buckhorns
F is the flat or drag bars