HELP!!!

[V4 Nut]

Right i read somewhere that my bike should take 15w-50 oil yet since reading through the manual it said 10w-40.....
So if anyone on here can even help in the slightest i would be more than greatful,

Cheers,

[viper_biker]

10w40 semi-synthetic is what you want.

[V4 Nut]

Thanks, saved a lot of grief

[Neosophist]

Maybe if your out on a track in the summer you'd wanna use that.

10W40 as viper said is a good all round choice of oil.. Make sure to get Semi-Synth though. Some of the additives in some brands of fully-synth oil can cause clutch issues.

[fastdruid]

Should still be fine with fully-synth as long as its bike specific, it's car oil you need to be concerned about as the friction modifiers (cars are all dry clutches) can affect the clutch.

Druid

[Neosophist]

Should still be fine with fully-synth as long as its bike specific, it's car oil you need to be concerned about as the friction modifiers (cars are all dry clutches) can affect the clutch.

Druid

Ah I see. I've done a bit of research into it.


The wikipedia article on Motorcycle oils says the following about car oil

Some oils make the friction plates in the clutch slippery so that the clutch doesn't engage properly when shifting gears, or the clutch slips when the engine exceeds a certain torque. Some oils contain friction reducing chemicals. These oils are unsuitable for motorcycles. All 5W20 and 10W30 non-motorcycle engine oils have these friction reducers. Oils with an operating weight of 40 or greater are not required to have friction reducers. These oils are unlikely to cause clutch slippage.

A properly specified motorcycle oil will still allow for the appropriate lubrication and cooling of a motorcycle clutch, whilst maintaining 100% of the drive to be transmitted by the clutch, even under arduous operating conditions.

Another interesting fact was...

"Multi-viscosity car-based engine oils contain viscosity increaser chemicals known as VIs that keep the oil from becoming too thin at high temperatures. The VIs are large chemicals that can be sheared between the cogs of a motorcycle transmission. A motorcycle transmission can degrade a 10W40 car formulated oil into a 10W30 oil in around a thousand miles"

[viper_biker]

Should still be fine with fully-synth as long as its bike specific, it's car oil you need to be concerned about as the friction modifiers (cars are all dry clutches) can affect the clutch.

Druid

Nope, it seems to be a common fault with the bikes of clutch slip with F/S oil. Just stick with S/S and you'll be fine.