Engine Number List

To determine the year, take the first digit and add it to the end of 197. For example, if the first digit is a “3” then the year is 1973.

For more information about these numbers, please reference the Production Year Guide.

YearType 51 (125cc)Serial Number
551431
6511008
YearType 52 (175cc)Serial Number
252125
252140
252566
252951
2521668
2522016
2522183
2522652
3522917
3524068
3524727
3524957
3525190
4525596
4525605
4525740
4525782
4525820
4526144
4526219
4526515
4526713
4526724
4526840
4527140
4527316
4527345
4527393
4527508
4527587
5527892
6528597
7529189
7529269
85210796
85210918
95211451
YearType 54 (250cc)Serial Number
354158
354341
354401
354545
3541262
3541366
3541415
3541422
3541960
3542069
3542499
3543010
4542708
4543420
4544251
4544344
4544586
4544647
4544652
5547325
5548225
5548586
55410346
55410520
6549764
65410387
65410407
65410577
65410661
65411444
65411794
65412031
65412751
65412751
75413324
75413688
75413733
75413780
75413958
75415059
75415322
75415510
75415701
85418268
85419065
95422709
YearType 55 (400cc)Serial Number
455164
455372
455862
455990
4551098
4551214
6552939
6553685
6554230
8556870
8557178
8557529
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