???????

[Mike52]

Ok Guys what is it
http://cgi.ebay.com.au/70S-DT-TY-YAMAHA-450-438-400-VMX-MX-MOTORBIKE-/320592492006?pt=AU_Motorcycles&hash=item4aa4cd35e6

[LWC82PE]

My first thought was DT360 but then he says it has 438cc on the barrel. I wonder if 438 is a prefix and not the cc

[noisy toy]

I am curious too! It definately says 438cc on the barrel  and both serial numbers say 450-blabla . Do the 250s and 400s have 250 or 400 on theirs? I have a good twin-shock dt400 engine that needs a rolling frame, but this has matching numbers......

[paul]

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

[LWC82PE]

Another thought, it might be an aftermarket big bore barrel. You used to be able to buy all sorts of kits like that in France which we probably never saw here.

Here is an example of one

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_rdc=1&item=120620735516&ru=http%3A%2F%2Fshop.ebay.com%3A80%2F%3F_from%3DR40%26_trksid%3Dp3907.m570.l1313%26_nkw%3D120620735516%26_sacat%3DSee-All-Categories%26_fvi%3D1&viewitem=

I have a lot of french magazines and there was a couple companies who used to sell big bore kits and aftermarket barrels for all sorts of trail bikes and they seemed to mostly sell them for Yamahas.

[paul]

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

[noisy toy]

Thanks for all the great info Paul, I will save that one. But do you know what the 438cc on the barrel means?
Cheers, Shane

[paul]

no sorry /freaky or nathan will probably know though  i recon

[dt tas]

hi it is just a part number or prefex just checked mine in shedhas same 43800 they also have 438 stamped under head aswell it is a dt250 cheers george

[LWC82PE]

Well thats an anti climax, just a plain old DT250.

[noisy toy]

Will a dt400 engine fit this frame?
Cheers, Shane

[dt tas]

yes it will as long as the motor is a 501 the later motors (mono shock) won't either 250 or 400 are the same but twin shock wont fit mono shock hope this helps  i have a 400 frame but i am in tassie cheers george