1vj pumping oil into airbox
 

after 50 kms bike starts leaking oil from airbox its entering via engine breather hose oil level is correct, compression is good 1000kpa,oil is pumping through reservoir ,oilcooler and oilfilter section,could it be caused by overheating or oil blockage within motor or what other possible causes ,every african or mazoongo mechanic so far has just scratched their head and put it in the weird basket,cheers for any opinions

From your story still the only things I can think of are:
1. There still is some oil in your airbox from previous overfilling. After 50 kms the oil is warmer and can more easily drip through the little pipes. Dismantle airbox and clean.
2. Overfilling with oil; are you you check the level correctly? As follows: at least 15 minutes of driving. Stop the bike but not the engine. Idle running for at least 30 secons. Stop engine and check. This is the correct oil level!

If all this does not help try and live with the oil leakage: your engine oil level is ok so no worries there. Since you are talking mzungo's you're in Africa so worrying about keeping your bike in the good old etat de concours is too much of a challenge anyway ...

Stay upright!
Auke