kaneys Posted September 26, 2012 Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 26, 2012 Moderator Share Posted September 26, 2012 574 is DT400C mark 509 is YZ250B 1975 Try googling them Link to comment Share on other sites More sharing options...
kaneys Posted September 26, 2012 Author Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 26, 2012 Moderator Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
kaneys Posted September 26, 2012 Author Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 26, 2012 Moderator Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
kaneys Posted September 26, 2012 Author Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
kaneys Posted September 26, 2012 Author Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
kaneys Posted September 26, 2012 Author Share Posted September 26, 2012 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 Link to comment Share on other sites More sharing options...
kaneys Posted September 26, 2012 Author Share Posted September 26, 2012 Maybe you were thinking of the yz250c that starts with 509-100101 to 509-103405. but our number is prior to that Thanks Link to comment Share on other sites More sharing options...
Moderator Cynic Posted September 27, 2012 Moderator Share Posted September 27, 2012 Could it be an import? A picture would be usefull. Link to comment Share on other sites More sharing options...
NEV Posted September 27, 2012 Share Posted September 27, 2012 Heres a start, it's all out there, its just a case of taking 5 minutes looking. Link to comment Share on other sites More sharing options...
kaneys Posted September 27, 2012 Author Share Posted September 27, 2012 thanks for that Nev.. where did you get these because everywhere else says different for DT400c 501-200101--211470, so now im confused Link to comment Share on other sites More sharing options...
kaneys Posted September 27, 2012 Author Share Posted September 27, 2012 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 Link to comment Share on other sites More sharing options...
NEV Posted September 27, 2012 Share Posted September 27, 2012 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 Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 27, 2012 Moderator Share Posted September 27, 2012 ahh so i was right then!!! Link to comment Share on other sites More sharing options...
flyday58 Posted September 27, 2012 Share Posted September 27, 2012 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!!! Link to comment Share on other sites More sharing options...
flyday58 Posted September 27, 2012 Share Posted September 27, 2012 Link to comment Share on other sites More sharing options...
kaneys Posted September 27, 2012 Author Share Posted September 27, 2012 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???? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 27, 2012 Moderator Share Posted September 27, 2012 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 Link to comment Share on other sites More sharing options...
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