Help me identify this bike

[kaneys]

My name is mark and I live in australia.. I have a Yamaha motorcross bike that has belonged to my wife for about 10years. We dont really know what it is.

At first glance it looks like a DT400 engine in a MX250B frame, but the guys at Yamaha had it for a couple of weeks and said there have been Modifications

Frame # 509-007392

Engine # 574-000323

there is a 50000 stamped under the head fins

From what I can see the 574- engine number is not a dt400 number at all

Any assisttance you can give us would be greatly appreciated

[Airhead]

574 is DT400C mark

509 is YZ250B 1975

Try googling them

[kaneys]

574 is DT400C mark

509 is YZ250B 1975

Try googling them

I did already obviously DT400C is 501-.. and yz250B is 483-000101 - 002759. Ive been through all of this on multiple sites.. I have googled the shit out of this

[Airhead]

thats how I saw it anyway

when I suggested you google it...I hadnt but upon your curt reply I did, cant be bothered to look at the other one but

http://www.ebay.com/sch/sis.html?_nkw=1976%20Yamaha%20YZ250C%20OIL%20DIPSTICK%20YZ%20250%20control%20dip%20stick%20model%20509%20&_itemId=270895655898

[kaneys]

thank you dont get me wrong I have been onto this for a long time. I appreciate any help I can get and pretty much everyone starts where you did so your not wrong in that regard. One other guy told me it was a yz250c competition bike but on further investigation that was proven wrong as well.. I have been told there was a mx500 prototype made in 73 that did not go into production but cant get anyone with info on that bike.. thankyou anyway

[Airhead]

Thats better

so continuing with the google thing...does your bike not look like the one here?

http://www.mccookracing.com/articles/charlieOxford_OldMotorcycle.htm

[kaneys]

thats how I saw it anyway

when I suggested you google it...I hadnt but upon your curt reply I did, cant be bothered to look at the other one but

http://www.ebay.com/...Id=270895655898

CURT??.. sorry I thought the "try googling it (winky face)" was a little curt.. but obviously mistaken sorry again

[kaneys]

Thats better

so continuing with the google thing...does your bike not look like the one here?

http://www.mccookrac...dMotorcycle.htm

Similar frame with no tank strap mount and a little different design behind the headstem

[kaneys]

Here is a list of serial numbers

http://dirtbike.off-road.com/dirtbike/review/yamaha-vintage-dirt-bike-id-guide-21792.html

for yamaha motorcycles

[kaneys]

Maybe you were thinking of the yz250c that starts with 509-100101 to 509-103405. but our number is prior to that

Thanks

[Cynic]

Could it be an import?

A picture would be usefull.

[NEV]

Heres a start, it's all out there, its just a case of taking 5 minutes looking.

[kaneys]

thanks for that Nev.. where did you get these because everywhere else says different for DT400c 501-200101--211470, so now im confused

[kaneys]

Sorry Nev but it looks like most of the numbers on the second list are different to all the other reference sites Ive looked at

How do I upload pics

[NEV]

I have the codes on pdf, but if you go to http://www.cmsnl.com/yamaha-model-code-reference-1961-1989_model11319/partslist/ should help

[Airhead]

ahh so i was right then!!!

[flyday58]

ahh so i was right then!!!

WHAT?!?! How could this happen?? Paul right about something? What is happening to my normal sane world?? Somebody slap me, I gotta wake up!!!

[flyday58]

[kaneys]

Ok I get it haha.. So you have one item with those numbers.. lets just as suggested earlier, google dt400c serial numbers

http://www.merrittmotorcyclesalvage.com/yamahaidentification.htm

http://cyclerestorer.com/pages/show_man_serial_num.php?sort_field=4&manufacturer=Yamaha

http://www.dirtrider.net/forums3/showthread.php?t=157610&conly=

http://dirtbike.off-road.com/dirtbike/review/yamaha-vintage-dirt-bike-id-guide-21792.html

Well thats a few that came up straight away, so I hate to say it is yours wrong or all these????

[Airhead]

Just what is your problem?

you came on here asking for help with id

I offered some help, you responded by just how wrong I was

someone else comes on and offers the same result and it's thanks matey where did you get that info from

WTF as they say