What is the actual maintenance cost on a W250?

[canuckjgc]

I keep hearing about the expensive maintenance on a four stroke and in particular on a WR250. I can get a 2003 WR250 for pretty cheap (seems lightly used) but if engine work is required at some time, what am I looking at to have the shop do it? Hundreds? Thousands?

 

[flyingfuzzball]

if the shop is doing all the work... it will be hundreds labor fee's suck.

 

[uh_oh]

the parts arent all that bad, the mechanic is.
I own a wr250 and the valves havent moved at all in 7 years.