I dont know exactly what the pipe is for but it is the left (i think) pipe from the rocker cover that drops down into a T-piece. I ended up snapping mine at the joint as it had become hard and moulded to the T-piece. Cheers.

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DIABLO GTI-6 - Legend - NILE GTI-6 - Sold
CHERRY GTI-6 P1 SUPERCHARGED - Broken up
BLACK RALLYE - Sold
205 Dturbo xud9 work horse - Dead
CHERRY RALLYE - new toy