Khartoum : Machine Shop
There is a machine shop in the Southern Industrial area of Khartoum,south along Sharia al Hurriya,
which did some good work for me on my Tenere.
ph number: 466757
One of the fitters there, Younis, machined me a new chain roller, fitted it and did some welding/rebuilding work on my bike.
It took him about 3 hours and I was charged 4000 Sudanese Dinar, about 16US.
Also, if you are looking for parts: SOuk al Shabi, in the same area.
Just ask for it by name, everyone seems to know it.