Old Tecumseh engine oil, Synthetic or regular?

[mchadsey1]

Hello!
I recently purchased a used 1973 Yamaha rd 350 and need an oil change. I can put this motor oil in it.
if not, please tell me which one

Look into this site it more geared to what your looking for . https://www.rzrd500.com/phpBB3/

 

[f4radar]

Hello!
I recently purchased a used 1973 Yamaha rd 350 and need an oil change. I can put this motor oil in it.
if not, please tell me which one

Are you asking about the oil for the side tank or the Engine/transmission case. I believe a 30w 2 stroke oil goes in the tank for injection and a 10-30 motor oil goes in Engine/transmission case.

 

[mchadsey1]

Are you asking about the oil for the side tank or the Engine/transmission case. I believe a 30w 2 stroke oil goes in the tank for injection and a 10-30 motor oil goes in Engine/transmission case.

Make sure the oil in the transmission is rated for a motorcycle. The detergents used in modern oils will destroy the clutch plates.

 

[sparkwizard]

That trans oil needs to say "wet clutch" on the bottle.
Put Yamalube or a modern 2 cycle oil in the side tank. I would not use synthetic oil in the oil injection tank unless it said it was approved for that purpose.

 

[Arthur80]

Thanks guys!