Model Frame Number Engine Number   1975 RM125M RM125-10001 - 30000 RM125-10001 - Not Applicable  (Notes)   This is a mid-year model identified by downpipe 1975 RM125S RM125-19800 - ? RM125-19800 - ?Not Applicable  (Notes)   This bike is very rare in the "states" to learn more about it buy VMX Magazine issue #20 2003' . The article is entitled " The Day the TM Died". Here's your link to order the issue: www.vmxmag.com.au . We also sell a RM100-125 Service Manual on CD that has the specs on this little bullet, check our Manuals page for more info.   1976 TM75A TM75-27488 to RM80B TM75-27778 to RM80B   RM100A RM100-10001 to 16021 RM100-10001 to 16023   RM125A RM125-30001 to 43982 Not Applicable   RM250A RM250-10001 to 20994 RM250-10001 to 21012   RM370A RM370-10002 to 17938 RM370-10002 to 17945   1977 RM80B RM80-10001 to 23348 RM80-10001 to 23634   RM100B RM100-16022 to 23119 RM100-16024 to 23133   RM125B RM125-43983 to 61850 RM125-44045 to 62012   RM250B RM250-20995 to 26795 RM250-21013 to RM250C   RM370B RM370-17939 to RM400C RM370-17946 to RM400C   1978 RM80C RM80-23349 to 39432 RM80-23635 to 39469   RM100C RM100-23120 to 28311 RM100-23134 to 28327   RM125C RM125-61851 to 84328 RM125-62013 to 84644   RM250C RM250-26795 to 30641 RM250- N/A to 307699   RM250C2 RM250-30642 to 38833 RM250-30700 to 39102   RM400C RM400-100001 to 105659 RM400-100009 to 105680   1979 RM60N RM60-100024 to 102730 RM60-100024 to 102730   RM80N RM80-39433 to 200009 RM80-39470 to 200067   RM100N RM100-28312 to 33043 RM100-28328 to 27821   RM125N RM125-84328 to 102502 RM125-84645 to 83086   RM250N RM250-38834 to 43891 RM250-39103 to 44024   RM400N RM400-105660 to 109716 RM400-105681 to 109784   1980 RM50T RM50-110854 to "Infinity & Beyond" RM50-110894 to "Infinity & Beyond"   RM60T RM60-102731 to JS1RB11A_B_100000 RM60-102731 to N/A   RM80T RM80-20001- to JS1RD11A_D_100000 RM80-200068 to N/A   RM100T RM100-33044 to JS1RE11A_B_100000 RM100-27822 to N/A   RM125T RM125-102503 to JS1RF11A_B_100000 RM125-83087 to N/A   RM250T RM250-43892 to JS1RJ11A_B_100000 RM250-44025 to N/A   RM400T RM400-109717 to RM465X RM400-109785 to N/A   1981 JR50X LN1JA11A_B_100001 to LN1JA11A_C_100000 JR50-______   RM60X JS1RB11A_B_100001 to JS1RB11A_C_100001 RM60-______   RM80X JS1RD11A_B_100001 to JS1RD12A_C_100001 RM80-______   RM100X JS1RE11A_B_100001 to N/A (no RM100 built in 1982) RM100-______   RM125X JS1RF11A_B_100001 to JS1RF11A_C_100001 RM125-______   RM250X JS1RJ11A_B_100000 to JS1RJ12A_C_100001 RM250-______   RM465X JS1RM11A_B_100001 to JS1RM11A_C_100001 RM465-______   1982 JR50Z LN1JA11A_C_100001 to LN1JA13A_D_100000 JR50-______   RM60Z JS1RB11A_C_100001 to JS1RB11A_D_100001 RM60-______   RM80Z JS1RD12A_C_100001 to JS1RD13A_D_100001 RM80-______   RM125Z JS1RF11A_C_100001 to JS1RF11A_D_100001 RM125-______   RM250Z JS1RJ12A_C_100001 to JS1RJ12A_D_100001 RM250-______   RM465Z JS1RM11A_C_100001 to 1983' RM500 RM465-______   1983 JR50RD LN1JA13A_D_100001 to LN1JA13A_F1100001 A102-______   RM60D JS1RB11A_D_100001 to N/A (no RM60 built in 1984') RM60-______   RM80D JS1RD13A_D_100001 to JS1RD13A_E_100001 D101-______   RM125D JS1RF11A_D_100001 to JS1RF12A_E_100001 F106-______   RM250D JS1RJ12A_D_100001 to JS1RJ12A_E_100001 J102-______   RM500D JS1RM12A_D_100001 to JS1RM12A_E_100001 M101-______   1984 JR50 Not built in 1984'. N/A   RM60 Not built in 1984'. N/A   RM80E JS1RD13A_E_100001 to JS1RD13A_F2100001 D101-______   RM125E JS1RF12A_E_100001 to JS1RF12A_F2100001 F108-______   RM250E JS1RJ12A_E_100001 to JS1RJ12A_F2100001 J102-______   RM500E JS1RM12A_E_100001 to that's it, last of the "Open Class". M101- ______   1985 JR50F LN1JA13A_F1100001 to LN1JA13A_G1100001 A102-______   RM80F JS1RD13A_F2100001 to JS1RD14A_G2100001 D101-______   RM125F JS1RF12A_F2100001 to JS1RF13A_G2100001 F108-______   RM250F JS1RJ12A_F2100001 to JS1RJ13A_G2100001 J102-______ N/A = Not Available    Other serial numbers available upon request.

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