Local Bike Mechanic Needed

I land in Jhb. tomorrow with 2 x DR650's and after spending 6 months in Central & South America, I am looking for a trusted, good and affordable mechanic.  I have done all the basic maintenance since leaving home, but still need to have the valves adjusted and have a few other things looked at. 
Can someone recommend a mechanic or shop that I can go to?
Daryll
www.oneworld2explore.blogspot.com