it'll do about 80 or 85
stock gearing around 60 mph
it was a 4 stroke
KTM
85
10w30 is what ktm recommend for a 2 stroke engine
Hard to say, need more information. 2 stroke or 4 stroke and if it is a 2 stroke premix or gear oil.
A KTM 250sx is the worlds fastest 250 2 stroke dirtbike.
Some of them are two strokes an some are 4 strokes Most of them are 2
60/40
No not on a 2 stroke 250SX, however the 4 stroke 250 SXF does.
Strip the carburettor down, soak the parts in carburettor cleaner, blow out all orifaces with filtered compressed air.