Ok, so I change my gearbox oil every 600miles..
But I just had a look in the Aprilia Use and maintainance book for the 04 RS50..
And it says 300miles for the first change..
And then 2500miles for the rest of the bikes life..
But changing the gearbox oil every 2500miles seems as too long between every change..
So what do you think?
Do you wait 2500miles between every change?
And isin't it better for the engine to change every 600miles rather than 2500?