OzVMX Forum

Marque Remarks => Yamaha => Topic started by: evo550 on October 19, 2011, 05:36:23 pm

Title: Help with numbers, What have I.
Post by: evo550 on October 19, 2011, 05:36:23 pm: I picked you a job lot of bikes and bits from a local wrecker today and need a bit of help with some numbers. So here goes.

DT eng and frame #575
I think a MX frame and engine #364, in silver. was that a '73 or '74
2 other motors one a #450 and a #1R8
Any ideas ?
Thanks.
Title: Re: Help with numbers, What have I.
Post by: mainline on October 19, 2011, 05:39:33 pm: I think the motors are 74 and 77 dt250
Title: Re: Help with numbers, What have I.
Post by: paul on October 19, 2011, 05:53:42 pm: YAMAHA MODEL INDENTIFICATION NUMBERS CHART
1971 MINI ENDURO
JT1 SERIAL # JT1-000101 - 041708
JT1 SERIAL # JT1L-200101 - 201152 W/LIGHTS
1972 MINI ENDURO
JT2 COMPETITION SERIAL # JT1-050101 - 071150
JT2 SERIAL # JT1-300101 - 330000 W/LIGHTS
1974 YZ A
YZ 80 A SERIAL # 462-000101 - 009661
YZ 125 A SERIAL # 453-000101 - 007730
YZ 250 A SERIAL # 431-000101 - 004104
YZ 360 A SERIAL # 432-000101 - 000631
1975 YZ B
YZ 80 B SERIAL # 492-000101 - 018570
YZ 125 B SERIAL # 453-100101 - 101620
YZ 250 B SERIAL # 483-000101 - 002759
YZ 360 B SERIAL # 484-000101 - 001459
1976 YZ C
YZ 100 C SERIAL # 1J4-000101 - 003470
YZ 125 C SERIAL # 537-000101 - 014044
YZ 125 X SERIAL # 1G8-000101 - 007120
YZ 175 C SERIAL # 1L8-000101 - 001610
YZ 250 C SERIAL # 509-100101 - 103405
YZ 400 C SERIAL # 510-100101 - 102838
1977 YZ D
YZ 100 D SERIAL # 1J4-000101 - 103550
YZ 125 D SERIAL # 1W1-000101 - 015610
YZ 250 D SERIAL # 1W3-000101 - 006520
YZ 400 D SERIAL # 1W4-000101 - 006720
1978 YZ E
YZ 100 E SERIAL # 2K5-000101 - 006572
YZ 125 E SERIAL # 2K6-000101 - 015080
YZ 250 E SERIAL # 2K7-000101 - 009850
YZ 400 E SERIAL # 2K8-000101 - 007406
1979 YZ F
YZ 100 F SERIAL # 2W5-000101 - N/A
YZ 125 F SERIAL # 2X3-000101 - N/A
YZ 250 F SERIAL # 2X4-000101 - N/A
YZ 400 F SERIAL # 2X5-000101 - N/A
1980 YZ G
YZ 100 G SERIAL # 3R2-000101 - ON
YZ 125 G SERIAL # 3R3-000101 - ON
YZ 250 G SERIAL # 3R4-000101 - ON
YZ 465 G SERIAL # 3R5-000101 - ON
LT SERIES
LTMX Year: 1973 Start Engine#: LT2-105101
MX SERIES
MX100B Year: 1975 Start Engine#: 427-100101
MX100F Year: 1979 Start Engine#: 3M1-000101
MX100G Year: 1980 Start Engine#: 3T0-000101
MX125 Year: 1973 Start Engine#: AT1-325101
MX125A Year: 1974 Start Engine#: 402-000101
MX125B Year: 1975 Start Engine#: 402-100101
MX125C Year: 1976 Start Engine#: 565-000101
MX175A Year: 1974 Start Engine#: 455-000101
MX175B Year: 1975 Start Engine#: 455-100101
MX175F Year: 1979 Start Engine#: 3M2-000101
MX175G Year: 1980 Start Engine#: 3M2-100101
MX250 Year: 1973 Start Engine#: 364-000101
MX250A Year: 1974 Start Engine#: 364-020101
MX250B Year: 1975 Start Engine#: 509-000101
MX360 Year: 1973 Start Engine#: 365-000101
MX360A Year: 1974 Start Engine#: 365-020101
MX400B Year: 1975 Start Engine#: 510-000101
AT SERIES
AT1 Year: 1969 Start Engine#: AT1-100101
AT1B Year: 1970 Start Engine#: AT1-120101
AT1BMX Year: 1970 Start Engine#: AT1-310101
AT1C Year: 1971 Start Engine#: AT1-139101
AT1M Year: 1969 Start Engine#: AT1-300101
AT1MX Year: 1971 Start Engine#: AT1-313101
AT2 Year: 1972 Start Engine#: AT1-165101
AT2M Year: 1972 Start Engine#: AT1-317101
AT3 Year: 1973 Start Engine#: AT1-200101
CT SERIES
CT1 Year: 1971 Start Engine#: CT1-000101
CT1B Year: 1970 Start Engine#: CT1-010101
CT1C Year: 1971 Start Engine#: CT1-200101/CT1-032101
CT2 Year: 1972 Start Engine#: CT1-065101
CT3 Year: 1973 Start Engine#: CT1-100101
DT SERIES
DT100A Year: 1974 Start Engine#: 437-000101
DT100B Year: 1975 Start Engine#: 437-100101
DT100B5 Year: 1975 Start Engine#: 540-000101
DT100C Year: 1976 Start Engine#: 558-000101
DT100D Year: 1977 Start Engine#: 1T9-000101
DT100E Year: 1978 Start Engine#: 2F5-000101
DT100F Year: 1979 Start Engine#: 2F5-050101
DT100G Year: 1980 Start Engine#: 3A3-000101
DT125A Year: 1974 Start Engine#: 444-000101
DT125B Year: 1975 Start Engine#: 444-100101
DT125C Year: 1976 Start Engine#: 560-000101
DT125E Year: 1978 Start Engine#: 2A6-000101
DT125F Year: 1979 Start Engine#: 2N4-000101
DT125G Year: 1980 Start Engine#: 3J0-000101
DT175A Year: 1974 Start Engine#: 443-000101
DT175B Year: 1975 Start Engine#: 443-100101
DT175C Year: 1976 Start Engine#: 559-000101
DT175D Year: 1977 Start Engine#:
DT175E Year: 1978 Start Engine#: 2A7-000101
DT175F Year: 1979 Start Engine#: 2N5-000101
DT175G Year: 1980 Start Engine#: 3J1-000101
DT1 Year: 1968 Start Engine#: DT1-00101
DT1B Year: 1969 Start Engine#: DT1-15001
DT1C Year: 1970 Start Engine#: DT1-50101
DT1CM Year: 1970 Start Engine#: DT1-95101
DT1E Year: 1971 Start Engine#: DT1F-00101/DTF-020101
DT1MX Year: 1971 Start Engine#: DT1F-090101
DT2 SERIES
DT2 Year: 1972 Start Engine#: DT1F-105101
DT250A Year: 1974 Start Engine#: 450-000101
DT250B Year: 1975 Start Engine#: 450-200101
DT250C Year: 1976 Start Engine#: 450-500101
DT250D Year: 1977 Start Engine#: 1M1-000101
DT250E Year: 1978 Start Engine#: 1M1-100101
DT250F Year: 1979 Start Engine#: 2N6-000101
DT2M Year: 1972 Start Engine#: DT1F-185101
DT3 SERIES
DT3 Year: 1973 Start Engine#: DT1F-135101
DT360A Year: 1974 Start Engine#: 446-000101
DT400C Year: 1976 Start Engine#: 501-200101
DT4 SERIES
DT400D Year: 1977 Start Engine#: 1M2-000101
DT400E Year: 1978 Start Engine#: 1M2-100101
Title: Re: Help with numbers, What have I.
Post by: evo550 on October 19, 2011, 06:10:55 pm: Thanks guys, that helps a bit, except for the 1R8 motor, and the Dt 250 which is complianced as a '76 (c),but it is a #575 number frame and engine not #450. The #450 motor doesn't have a tacho drive the same as the other motors,and has a plate covering the auto lube drive hole, which made me think it was something else other than a DT.
Title: Re: Help with numbers, What have I.
Post by: Nathan S on October 19, 2011, 08:58:53 pm: Is the plate a neat die-cast thing? I had one on a MX125 motor - in hindsight, it was probably YZ125A (or maybe an option for an MX?).

Haven't seen a 450 motor that isn't DT250A/B/C. Is the head radial finned, or parallel? Radial = B/C.

1R8 = early DT400 monoshock? I had one years ago, and I'm pretty sure it was that prefix. Might have been 1R7 (in which case, 1R8 is probably early DT250 mono)? It was 6/76 compliance, which is very early for a monoshock bike.
Title: Re: Help with numbers, What have I.
Post by: Iain Cameron on October 19, 2011, 09:06:19 pm: Ir6 is the Euro 1978 dt400 , Ir7 is the Euro 78 250 . page 171 Yamaha dirtbikes by Colin Mackellar . the 364 is a 73 mx 250 (silver for 73 yellow for 74 ) . Is the mx frame for sale?
Title: Re: Help with numbers, What have I.
Post by: GMC on October 19, 2011, 09:15:42 pm: Fairly certain my 77 DT 400 D was IR9…
Unfortunately the number wasn’t recorded on the receipt
Title: Re: Help with numbers, What have I.
Post by: evo550 on October 19, 2011, 09:23:47 pm: Pics might help, see what I can get sorted tomorrow.
I would appear that the either the 450 or the 1rg motor has an internal rotor ignition ?? Where Dt's ever fitted with these?
The only 1rg part I can find on the net is a IT125 g base gasket.
Title: Re: Help with numbers, What have I.
Post by: GMC on October 19, 2011, 09:24:06 pm: Strange the things you remember, I just found the Rego papers and it was listed as IR9

And...
The annual fee was $9.40 :o :o (Rego Portion)
Plus $65.20 for Insurance

Ahhh, those were the days
Title: Re: Help with numbers, What have I.
Post by: Iain Cameron on October 19, 2011, 09:38:13 pm: the 450 's were points systems
Title: Re: Help with numbers, What have I.
Post by: evo550 on October 20, 2011, 08:48:47 am: Ok here we go.
(http://i118.photobucket.com/albums/o82/evo550/DSC00131.jpg)
The 450 motor with internal rotor ignition, cases look the same as the other DT motor, just different numbers.

(http://i118.photobucket.com/albums/o82/evo550/DSC00132.jpg)
The 1r8 motor, totally different cases, clutch actuating arm on top of cases (not underneath like other motors)

(http://i118.photobucket.com/albums/o82/evo550/DSC00133-1.jpg)
(http://i118.photobucket.com/albums/o82/evo550/DSC00134.jpg)
This cylinder is also different to the others, but doesn't fit the 1r8 cases, is it DT or MX ?

(http://i118.photobucket.com/albums/o82/evo550/DSC00135.jpg)
(http://i118.photobucket.com/albums/o82/evo550/DSC00136.jpg)

The MX frame... the motor is currently in a DT frame, what's the tank from, fits perfect but has lockable cap ?
Title: Re: Help with numbers, What have I.
Post by: Nathan S on October 20, 2011, 08:53:27 am: Ignition is YZ250C or earlier. Maybe MX250B.

Different location of clutch arm = monoshock motor. Can't offer more than that.

Barrel appears to be late twinshock (DT-B/C).

DT-A tank is identical to MX-A, except for tap and cap.
Title: Re: Help with numbers, What have I.
Post by: Iain Cameron on October 20, 2011, 10:00:43 pm: Swing arm looks like its got some major ribbing welded to it , top mounts moved forward please tell me the old mounts havent been gas axed off . If the frame is for sale Im after it . Iain
Title: Re: Help with numbers, What have I.
Post by: evo550 on October 21, 2011, 09:02:00 am: Ian,
Didn't see the s/arm bracing till then, the top mounts look like a period mod, but well done. The back half of the original mount is gone but could be easily redone. I think I'll keep the laydown look. Sorry mate MX bits not for sale, but I will be getting rid of the DT and bits, once I get through sorting it all out.
(http://i118.photobucket.com/albums/o82/evo550/DSC00164.jpg)