DT/RD 125 Engine

[PICTURE_MAN36]

Hello,

I am restoring a DT125 and have picked up a spare engine. It has a serial number '12A'.... followed by numbers.

Does anyone know if this is a DT125 LC mk1?? or RD125 LC??

I own a DT125 LCII and the engine number begins '35A'.... but this does have the power valve blank...

Any response would be appreciated.

Thanks

[Airhead]

According to my Haynes manual 12A is the restricted version of the RD125LC

[PICTURE_MAN36]

Thank you... I guess this fits with the DT frame, but has a different front sprocket?

Much appreciated.