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

Reunited Chris said:
So my triples use V-twin oil but only run on 2 cylinders, where can I get 3 cylinder oil from? 4 cylinder oils spew out of the oil breather.
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Well is you triple a 180 or 120?

If a 180 you mix two bottles of 360 degree parallel twin oil with one bottle of single cylinder oil. Don't use too much of the single oil or it will turn in to four cylinder oil.

As the 120's are somewhat gay you need to buy oil made for a girls bike. Putting 180 oil in the bike will make the 120 become transgendered and want to become a 180. Luckily Red in Oz can do the surgery and the former 120 will be able to hold its head high and live a meaningful life.
 
1200ts said:
Well is you triple a 180 or 120?

If a 180 you mix two bottles of 360 degree parallel twin oil with one bottle of single cylinder oil. Don't use too much of the single oil or it will turn in to four cylinder oil.

As the 120's are somewhat gay you need to buy oil made for a girls bike. Putting 180 oil in the bike will make the 120 become transgendered and want to become a 180. Luckily Red in Oz can do the surgery and the former 120 will be able to hold its head high and live a meaningful life.
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Whilst I believe there’s nothing wrong with being gay, a transgender bike (120 to 180) however may be subject to racing bans, as in the Olympics, in racing…… once the scrutineers pick up on the sex change the bike may be sent home due to its unfair advantage.

In road bike trim, anything goes…. darlings. 💃
 
And if you don't have access to V-twin oil, mix flat- and parallel twin oil. My father appreciates all the savings, using remnants from my BMW and Laverda for his Guzzi. You guys are the best! (and crack me up :D :D )

Seriously, FWIW, I use Motul 20W50 mineral MA2 (as Exmoor Beast already indicated) and have no issues with the clutch. I'm far from an expert but if you use MA2 oil there's probably something else wrong? I buy 8-10 liters of the stuff, mostly at Autodoc where you can put it in your cart and get an alert if the price drops.
 
jko_78 said:
... I'm far from an expert but if you use MA2 oil there's probably something else wrong? ...
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No

Up to around 1980's vehicles equipped with dry or wet clutches generally used same stuff, cars and motorcycles. Then oil companies started to add friction modifiers, some of these were poison for wet clutches. The JASO MA and JASO MA2 have became widely used settled international standards to standardize this for wet clutches. JASO stands for Japanese Automotive Standards Organization. Almost all of the so called motorcycle specific oils nowadays are promised to meet one of the two standards.

The lubrication for these old type of camshafts and their valvetrain mechanisms in petrol engines is standized in widely used international standards by API Sx spec (Americal Petroleum Institute). Add a letter on the "x". I need to check the suitable letter range for Laverda. There is also alternative standards for valve trains such API Cx for diesel engines, ACEA C3 (European Automotive Manufacturers' Association), but this latter is for more modern engines that have different materials, coatings and type of lubrication for the valve train.

On these widely used international standards the laboratory tests are based both on scientific and empirical methods. They are not much about opinions.
Secondly they are standards, it is possible that some manufacturer states some stuff to meet the spec and especially that some of batches are not meeting, it is just their promise. As well some other oil may meet the specs but it is not promised or tested.

Some manufacturers sell these V-Twin oils. At least some manufacturers bottled cheap Diesel oil on these bottles with higher profit that meet a spec for higher temperatures like some V-Twins may require. I'm not convinced that these oils would be optimal for Laverda, considering the lubrication of the valve train, etc.

-Jouni
 
Rarely comment on these threads but here goes - I use Mobil 1 V-Twin oil in my (SF-based) twin. Totally synthetic, motor puts out way more power and torque than a standard SF and I experience zero clutch slip. Cam and rocker wear are probably the twins' most prevalent problem areas and this oil offers excellent protection - expensive, but it's not a high-consumption item. Opinions differ.
 
MotoJouni said:
No

-Jouni
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Hi Jouni,

Thanks for the explanation! What i meant to say was that if there is modern-ish MA2 labeled oil in the topic starter's bike, logically there would seem be little chance of that being the cause of clutch issues, and something else may be wrong.
Interesting how oil, tires, brake fluid and batteries always seem to be recurring topics, be it camper vans, bikes, or any other vehicle! :)
 
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