RD 125 DX oil Pump leaking

[sknippen]

Hello All,

I am new here.

I recently bought a '77 Yamaha RD 125 DX.  It is in a overall good condition and has low mileage. 
But with checkup i noticed that the oil pump is leaking.  I plan to repair the pump (or send it for repair), but i the meanwhile i will run on premix.  
Is it ok for a RD to run on premix and what ratio  oil/fuel i should use?

Thanks in advance,


Sonny

[earthman]

The ratio aspect is a bit of a minefield, I've seen the following quoted on here, 25:1 30:1 35:1 and 40:1

I recently run my 350LC on 25:1, just for a short time, to check that oil were actually getting through to both carbs.

[markhoopy]

Read through what Arrow says in this post:

rdlccrazy.proboards.com/thread/20427/oil-pump-graph

[Ozhammer]

Send your pump to Arrow and get it back better than new.

If running premix, you are likely to need to re-jet your carbs.

HTH

[arrow]

If you run on premix even for a short time you will need to remove the oil pump wormshaft and blank off the hole.