The biker on the Grease set
Just inside the Grease set a biker leans on his motorbike: "SOME UNCOOL DUDES WALKED WITH MY THREADS".
Nudge 1Where to look
"Threads" means clothes. Somebody has walked off with his.
Nudge 2A stronger push
What does a fifties biker wear? It's black and it's made of leather.
Nudge 3Almost there
It's lying in a hut on the jungle backlot, at ground level (The huts in the village and by the bank).
What you needOther problems to solve first
Solve these first (each opens its own page, no answers on the way):
Show the solutionThe whole answer, with a video
Bring the leather jacket from the hut in MGAMBA VILLAGE. The biker puts it on ("NICE ONE SEYMOUR NOW FOR SOME MEAN WHEELIN!!"), rides off, and leaves a bicycle pump behind. Take it: the balloon needs it (Getting across the river).