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Makotosun

1971 DT1MX

  • Doctor K
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1971 DT1MX was created by Doctor K

Quick question from a new member: I looked up the VIN numbers on the website and I noticed that the VIN numbers for the 1971 DT1MX and 'DT1S' are similar. I have what I believe is a close-ratio DT1MX motor, #DT1F-91163; it also has matching numbers stamped on the bottom of both cases - #3751 (none of my other Yamaha Enduro motors have these numbers stamped into the bottom of the cases). The transmission cluster is close-ratio, which I understand means first and second gear are higher than the wide-ratio tranny with 3rd-5th the same. Do I have all this right? Is this a DT1MX motor or a DT1S? Thanx!

Dr Kawasaki 1976 YZ80, 1972 DT2, 1972 RT2, 1971 (DT1MX)?
19 Jul 2022 18:12 #1

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Replied by yamahahaha on topic 1971 DT1MX

DT1MX    DT1F-90101 to 93684
20 Jul 2022 06:27 #2

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Replied by Doctor K on topic 1971 DT1MX

Does anyone know about the 1971 DT1MX and 1971 DT1S having the same VIN number (check out the tech info - VIN numbers)? Thanx, Dr K
21 Jul 2022 11:54 #3

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Replied by MarkT on topic 1971 DT1MX

Not the same.  Different prefix. 
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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21 Jul 2022 14:37 #4

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Replied by Swoop56 on topic 1971 DT1MX

The DT1 S isn't a 71 model , it's actually a 69 1/2 .
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21 Jul 2022 22:38 #5

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