Hello,

I am refreshing my RT3. The bottom end had a bit of noise so I parked it two years ago. The build is moving along. I haven't been able to find RT3 oil output specs for the auto lube pump.

Can anyone tell me the flow for a 1973 RT3?

Thank you,

Bill

I have never found the exact specs in Yamaha Literature.  I've seen up to 1971 specs and then 1974 and beyond.  The 1971 RT1b and then the 1974 DT360 have the exact same same specs so "best guess" is the RT2 and RT3 had those same specs. 

Idle 0.95 to 1.2 cc per 200 strokes.
Full Throttle 8.8 to 9.7 cc per 200 strokes.

Thank you for the help.

Here is another question: Maybe someone knows the answer. The book says the clutch springs should be no less than 36.4mm. My springs are 34.5mm +/-. I bought a new set of OEM Yamaha clutch springs. They measure 34.5. Is this a mistake in the book?

 

This thread might answer your spring question.
yamaha-enduros.com/index.php/forums/1968...spec-question#143851

Thanks man. I can't wait to have this bike reliable. It is one of my favorites. It fits me perfectly and still has the original seat. The new seats aren't quite the same.

Ok, ready to fire it tomorrow. Waiting on a kick start seal. One more question:

The exhaust string gasket.... Seems like there is a reason they don't use this design anymore. I am not sure if I should pack it in the manifold or try to wrap it around the pipe before installing it. Any tips on how to use it?

Thanks for the help,

Bill

Whilst it's not immediately obvious, the manifold is actually two piece.

I took all of mine apart by resting the outer parts of the manifold (where the bolt holes are) between two pieces of wood and then knocking the inner part out with a wooden hammer (rubber should do just as well).

I gave both parts a thorough cleaning and then reassembled.

The string gasket fits, I believe, between the inner and outer parts of the manifold - some folks just fit one diameter's worth of gasket, others two (you will have some left over).

The exhaust fits between the inner and outer parts of the manifold and pushes up against the gasket. Make sure that the retaining springs aren't tired!