Motorcycles differ from cars in more ways than just the number of wheels they have. One such way is that the technology used in motorcycles often lags far behind that of cars. For example, you could purchase a carburated Harley Davidson as late as 2008 and many street bikes are just getting the advantage of antilock brakes.
Mechanically, motorcycles differ as well. Motorcycles require less power to go fast due to their low weight so smaller engine displacements can be used. Small displacement usually means small pistons which can encourage screaming high redlines. Also, the engine and transmission need to come in a pretty small package to fit neatly into the tiny frame of a bike. This small packaging for the drivetrain leads to one of the key differences between bikes and cars and that is wet clutches and single lubricants.
To learn a bit more about wet clutches, check out this article outline the differences between wet and dry clutches.
The use of a wet clutch and the added complication of needing one lubricant that can take care of your engine and transmission makes the type of oil you choose very important. If you’ve ever changed the oil in a manual transmission then you know gear oil and engine oil are two very different fluids. Finding one oil that can do both jobs is tricky enough but then you also need to consider something that will allow your clutch to work properly without too much wear but with enough friction to actually grab.
Using an oil not rated for a motorcycle can really make your clutch act unpredictably or wear out very quickly due to slipping. Similarly using too light of oil can cause transmission wear and using too heavy of an oil can cause cam wear or piston scuffing.
So What is the Best Oil for a Wet Clutch?
PJ1 Silverfire 4T Motorcycle Oil is recommended for motorcycles requiring 10W-30, 10W-40, 20W-40, or 20W50 and will provide excellent lubrication for both your engine and transmission. PJ1 Silverfire 4T Motorcycle Oil also has special dispersants which help control wear products from your wet clutch to keep your oil clean and lubricating rotating components between oil changes.
PJ1 Silverfire 4T Motorcycle oil also contains a perfect blend of detergents that can clean up sludge left behind by second rate oils that have left deposits behind. With your engine and tranny cleaned up, the corrosion inhibitors and anti-wear additives will keep your engine running smoothly for miles to come!