Hi I am new to the site 

I am in the process of restoring a dt175 with no papers or registration number.its a twin shock I think about 1976 the vin starts with 1G1-0011 any got any idea of mode/ year? 

Cheers

Yes Dt175 76 to Sept 78, 

Last of the twinshock model, 1G1-     1977/78  ,,  should be  silver  /white fenders,  The   1976  = 559-  Red  with  white stripe,[ Nayruff avitar].

It's a bit late, but anyway: You can check Yamaha 9 digit VIN here https://impreso.no/yamaha/9vin/