What model is this?

[Slakewell]

Many things dont add up on this bike I think its a 78 seller says 76 frame number would suggest 77 Frame number 80106077 any idea's guys?

[bigk]

My money is on '78. It's cool, just way to pricey.
K

[oz555ktm]

    the frame Number say it all

       801 106077

      The 8 = 1978

      The 01 = January

      the 106077 are Numbers

     Now if the frame Number started with 550 106077 yes it could be a 1976 or 77

    Some  1976 and 1977 MC5 and the 1977 GS6 did not  use the KTM datting code system .
    Sume  used  a 550 ##### Number
    Why I dont know That may have been Made from a special event Eg 6 day ?
    More Beer will need to be drank to work that out ...at the Next KTM owners Day ...

[Slakewell]

Thanks Denis
Would this engine number be 74 then? Engine No- 54 30 003 010

[ozktm]

Thats not the engine number, its a part number....

should be  for a 250 , 8-54xxxxxxx or maybe 7-54xxxxxxx  as the engine cases would been on the shelf....

[Slakewell]

[oz555ktm]

   Yep that the Part Number all wrigth..
    54 = 250cc
    30 = Engine parts
   003 = the number given to the engine case in the parts book pitchure
    010 = part number

   The Engine number will just under the Front engine Bolt  rigth hand side (foot brake side )
   and the Numbers will be just like goolys said ...

   and  on the left side under the engine bolt will be the last part of the engine number iand that should match ..
   if that do they are a match pair .
    if not well who know what happen Basket case then ..

[Slakewell]

So 6-5411539 would be 76 ?

[ozktm]

Remember your just going off an engine number stamping...The frame setup will dictate the year model of the complete bike, especially after thirty years and possible engine swap. But yes, the 'Engine' you mention is most likely a '76.

There are cast dials in the cases too. Billy C's cousins 1974 175 (which he has owned since new), has engine casting dates of 1972...