For those who wish to perform some preventive maintenance on the M47TUD20 engine, there are companies who supply and / or fit blanking plugs to allow the removal of these swirl flaps altogether.
2.
The DT 200 shares its engine cases with the ATV BLASTER-the blaster was an air cooled model but the crank is the same, the piston doesn't have port's on the DT200R . In the Blaster version & some of the DT200WR versions the oil pump is not installed, blanking plug is fitted over the oil pump drive.