Virgil (bike Q?)

this is a question i am trying to figure out. And yes it is the Oil question. As you know my bike has a 50cc 2 stroke engine. now i spent the day researching on how a 2 stoke engine works and found out something very interesting. As the engine runs it sucks the gas/oil mixture into the crank case thust compressing the air/gas/oil mixture and lubricating all of the components such as crank and rings and bearings ect....

Now my engine has a solid drive transmission. key to remember. but on the engine i have this place to put oil in, regular motor oil. Now for some reason this oil never ever gets dirty, so i know the engine does not use it. The question is what is it used for? is it for the transmission or for the cooling of the engine? Also if it is for either one of them what kind of oil should i put in there, currently i have 10W-40, the one without the star symbol, as you mentioned is crap oil. So i followed your adive there. So if it is for cooling would a thick or thinner oil be good for heat disapation, and if it is for the transmission what would be the best thickness to lubricate the parts. The oil does get really hot, but like i said does not get dirty. And as we know oil does not last forever. Also when is the proper time to change it, every 3 months like a car (5000km) which i highly dought this bike will ever travel. I know this is a very interesting topic and i would like to know more.

Eh, Jeremy, the question is hard to digest given
the brief data conveyed... However, from the
sounds of it, you've got a 2 stroke engine. Which
means you utilize oil in the gas burning scenario
and therefore should be using 2 Cycle oil which is
specifically designed for such apps....

Best to look at owners manual, then let me know
what criteria to discuss. If don't have one, call
a dealer for core advice: I woundn't guess at
such because one needs to know what the
manufacturer specifically designed into the engine.

Lastly, I infer you have a shaft drive tranny. That
means it's sealed but nevertheless, periodically
does need to have its oil changed:
Usually quite heavy stuff in the 80 to 90 weight category. Again, you must assess owner's manual first before anything else!

In any event, because of your bike's uniqueness,
I'd love someday to see it and examine the design
elements up close...at which time, we could
discuss the best oil applications therefore.

As to your present use of 10w-40, remember that
there in fact does exist a parallel 10w-40 specially
designed for bike applications: The bike version
uses the "SG" additive package which is much
more engine-wear supportive than the conventional
10w-40 that is designed for car apps, getting
only an enhanced version of the presentday "SJ"
additive package which doesn't impress me to say
the least.... The biker 10w-40 specifically states
same on the front label, usually is not readily
available except at bike stores, or has to be
ordered in by Lordco car vendor types, etc.

If your owner's manual will support it, the
absolute best oil in summer weather is 15w-40
which has the best additive package of just about
any oil in our conventional marketplace! Surpassing even the 20w-50's additive package!

Due to the existence of the biker oil, I specifically
blend BOTH oils in my SC so that I'm getting a
even greater edge on longevity than available by
using the conventional 10w-40 alone !!!
Not to mention that the engine experiences even
less friction due to such an approach and is
HP enhanced to a degree....

Anyway, once you've gotten the owner's manual
data, give me a shout and let's take it from there.
Peace, virgil