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Gene563 · 07-10-2018, 02:25 AM

Welcome to the forum, Terry.
I don't know anything about the Zuma, but...
Is the 2 Brothers pipe a performance exhaust.? Perhaps the EFI can't keep up with it at speed ... on a carbureted bike, you could re-jet.
Maybe try a stock pipe and compare.?

07-10-2018, 02:25 AM	#13
Gene563 Join Date: May 2015 Location: Lanoka Harbor, NJ Posts: 63	Welcome to the forum, Terry. I don't know anything about the Zuma, but... Is the 2 Brothers pipe a performance exhaust.? Perhaps the EFI can't keep up with it at speed ... on a carbureted bike, you could re-jet. Maybe try a stock pipe and compare.?
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