What is best oil to use in 1974 750 SF to avoid clutch issues is ????

I had high RPM 3rd-gear slippage in my 3C clutch, which had sat 25 years. Yeah, I should have taken it apart and cleaned it, but I was lazy. For the first 150 miles, I ran Shell 15W40 Rotella as it is cheap, and has been fine in my other wet-clutch bikes. I recently drained it and put in Liqui Moly 20W50 mineral oil, and it's not slipping or puffing smoke on decel (valve oil seals, which I'm sure I should change out). Bike seems to like it, whether it's the best or not is beyond my pay grade.
 
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Just make sure you don't use V twin oil or the motor will explode. Oil made for 180 degree twins is just as bad. Make sure on the oil bottle it says for 360 degree twins only. Also avoid racing oil as it will make the bike go too fast!

Now your 750 is 52 years old and probably has the original clutch. Take it apart and inspect it. Changing to a different oil will probably not help.
 
Saddled a Laverda 750 SF0 for 45 years. Runs Great on any Trucker's 15w40 DINO Oil such as Shell, Delvac, Rotella ... etc . DO NOT use a Synthetic or a Teflon additive or you will cause Clutch to Slip and you will have to Clean, Bake and Scuff the disks ;o)

The original owners manual called for straight Shell SAE 30 but a Trucker's 15w40 DINO Oil is perfect - There's no need to spend more for exotic expensive racing oils period.when you should replace the oil twice a season if you do any amount of riding on her. Keep that chain serviced as well - Happy riding your 750 SF.

PS: Drill and tap the oil filter plate for a Magnetic Drain Plug ;o)
 
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