[swazi_matt]

I did mine at 300hrs and the mechanic gave me the crank etc to keep as a spare since it was all still fine. I only did it because the bearings on that model were sealed, but by 300hrs the rubber seals had worn open so probably not something to worry about

And i drowned my bike a few times so had good reason to do it, but good airfilters and good oil seem to be the trick