How often should you change gear box oil !?

Question

in a off-road bike .

Answer 1

If you ride sand dunes change oil after every ride.The silt gets in their and it is just like sand paper on the internal parts,or approx. every 500 miles.

Answer 2

every 500 miles

Answer 3

2 Stroke or 4 stroke.

Personally I would change it once a year in a two stoke since it does not lubricate the crankshaft Once a year as oil deteriorates over time and on an off road bike it could get water contaminated ( especially if pressure washed )

or 4 stroke maybe more often if you use it loads ,

Answer 4

i dont know how many times ive got to say this but its ''not gearbox oil,its engine oil'...every 500 miles will do...