Nothing at all!
For stroke engine bikes use the engine oil as gear oil. In case of a two stroke engine you can use regular 80 W / 90 gear oil.
That is not a good idea.
If it is a 2 stroke use 80/90. Weight gear oil. If its 4 stroke run what specified on the engine
There is no such thing as engine oil changes in two stroke motorcycle engines. The two stroke oil serves to lubricate the engine as it is mixed with gasoline. For the gearbox, on the average a yearly change of gear oil is sufficient.
The best way to know if an engine is 2-stroke or 4-stroke, is to look for an oil spout. If the engine has an oil spout where oil has to be poured into, it is a 4-stroke. If the engine has no oil spout and the oil has to be added to the fuel, then it is a 2-stroke.
10w30 is what ktm recommend for a 2 stroke engine
The recommended oil to use for mixing with gas in a two-stroke engine is two-stroke engine oil.
It is possible to use 4-stroke oil in a 2-stroke engine in an emergency situation. You should not use this oil in the long term as it will damage the engine.
If it is a 2-stroke engine, 2-cycle engine oil is added to the gasoline. If the engine is 4-stroke, regular 30W motor oil is used. To tell if your engine is 2-stroke or 4-stroke, look for a spout where oil is poured into the engine. If there is no spout, then the engine is 2-stroke and 2-cycle oil must be added to the gasoline.
There is no oil to change in a two stroke engine. The lubricant is the oil that is mixed with the gas.
I'm not sure if you are talking about oil or the gas.In case of the gas -It will run. no side effects.
Drain it out and replace with proper oil