Africa Tin Problem
 

Hey guys i hv a africa tein 750 and now im in andes in bolivia,the bike start with a black smoke on pipe,anyone now anything about this problem or a good mecanic in santiago Chile?many tnx

Most likely:

Choke coil is stuck

or

air filter is full of dust

sorry for bad english.

does the bike have altitude sickness?
check the airfilter is really clean as already mentioned. I suspect he is at hi altitude, and the engine is running a bit rich