Can anyone ID this engine piece and tell me why its leaking?

[truckster225]

So this bike is new(to me). Its a 75' DT100 Its been leaking a greenish substance. The bike still runs fine though.

In the pic is two little red circles. In the right circle is the little nut shaped thing with a screw in the top. Its leaking! In the left circle is a cap with a little thing inside that looks like the screw on top should fit into it.

Can you tell me what it is and what it does?

Ive done a few repairs, but I've never had the occasion to deal with this part. ANY input would be welcomed!

Thank you!

 

[Mad Norris]

The right circle is around the neutral indicator. There should be a wire attached to the screw, which goes to your neutral light.

The cap in the left circle is to protect the clutch lever mechanism from dust/water. There should be a cap on the neutral indicator too.

 

[whenfoxforks-ruled]

The left one is the clutch actuator nut, and the right is the oil pump or tach set screw?

 

[truckster225]

Thank you! Does anyone know why it might be leaking? And what?

 

[truckster225]

Well, turns out it was just loose! Yup, not my smartest moment :coocoo: ! As for the cap, if its only a neutral indicator then im not going to sweat it. The Speedo doesnt work anyway. And trust me, one less reason to look down when im riding is a good thing!