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Mikuni Hose Mapping

JDusza

New Member
Hi. I'm helping a friend install a Mikuni BN401-38-26.
There are four (4) hose nipples,
One is marked "Pulse".
The remaining three (3) are not marked. One is of the larger diameter than the other two and is located on the opposite side as the other two.
I've looked for definitions of these nipples and have found nothing.
Can anyone define the remaining three nipples?
Is the larger nipple the fuel input from the filter to the fuel pump?
What are the other two smaller nipples? Is one of them a return line to the tank?
Thank you,
J
 
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