After 3,000 hours, I finally checked front axle oil level. There was no oil in the axle-differential, but each hub contained about a quart of oil on each side. If you fill only at the dipstick port, each hub takes time to fill, hence when the dealer prepares a new machine, the axle-differential will be empty after use. The hubs will be full.
My Ls mt 125 started leaking. I change the oil with 80-90 gear oil. In the summer it was fine now it is winter and one side is leaking bad. I will replace the seals.
Of course it heats up. There are metal moving parts in the axel that cause friction. Thats why it requires fluid to begin with. Fairly basic mechanics there. Im gonna go ahead and get temp readings before and after for you.
I agree it will not be much of a temp difference Peter. I have also seen people replace the breather with an open vent so who knows. Either way it has worked for me.
It is not about temperature change during use, it is ambient temperature change, even overnight, can be 50 degree variation. If the front axle is not vented, air pressure change will force oil past the seals, or somewhere.
