Quote:
Originally Posted by Megadan
Using the VM26 jetting as a starting point isn't entirely a bad idea, but you will likely have to tweak the jetting a tiny bit to run better with the pumper.
In this case, the keihin pilot jet size will likely be around a 40 (38, 40, 42). The main jet, if we are comparing genuine jets, would be around a 138 - A mikuni 120 orifice size and a Keihin 138 are the closest equivalents to one another. Wether this holds true with the jets from other companies is a different question.
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Awesome, thank you for confirming.