well it matters wat kind of bike it is if it is one of those really nice Motocross racing bikes then change the oil every time you go riding me i change it once every week so it does not hurt my valves or siez my engine.
valvoline
If you intend to keep your vehicle's engine clean, change it every time you change your oil. The filter holds the dirt your engine generates. Hence the dark color of your oil as it ages and is pumped through your engine. Dirt is dirt. Get it out.
by book 7,500 miles unless always in town or on dirt roads
just 2-stroke oil can get it at fix up stores, many places have it
depends chech the owners manual
Oil change is the process of cleaning the engine by removing dirt and other impurities from the oil filter.
bad clutch cable, or not enough oil on the clutch plates.
The quicker 2 stroke dirt bikes use a gas/oil mix. Most bikes you see on the road are 4 stroke and use regular gasoline.
Most common is inadequate oil mixture or straight gas in the tank, also overreving.
If you have never owned a dirt bike its a motorcycle made for off road and not on road purposes but you may change the tires to go on road. Once you get better you can race one another, free ride, or do free style. I recommend free ride once you get used to the bike. There are also different dirt bikes for example: 50cc, 70cc, 80cc, 110cc, 125cc, 150cc, and 250cc. There are also two different kinds of dirt bikes, Trail and Racing. Trial dirt bikes are for the mountains and free ride but not made for racing they also go slower than racing dirt bikes. Racing Dirt bikes are made for racing and are way faster than trail bikes. There are also 4stroke dirt bikes and 2stroke dirt bikes. 2 strokes take oil in there gas and way faster than four strokes and 4 strokes take regular gas. I was at the trake once with a kid with a 2stroke and I have a 4stroke 80cc and course he beat me to a race not because I'm not bad because I have been riding for about 4 or 5 years its because he had a 2 stroke. but the kid did have more skill than I did because he did actual races. sometimes its not how big the bike is its how much skill you have
ATF is generally all 10 weight hydrualic oil. You can use atf in your forks on dirt bikes/street bikes. Stay away from Type F it will cause leaks.
some newer 4 strokes do but in general most 2 strokes do not, they have a screen installed between the case halves