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06-26-2017, 08:10 PM,
#1
07 650 Custom loss of power & backfires
I have an 07 650 custom which I purchased last summer with 2000 miles on it. It has been running great until this past week. I was accelerating up a hill when all of a sudden it backfired and lost a significant amount of power. It only had about 60 miles since I filled with fuel so I know it wasn't out of fuel so my next thought was the fuel valve was off. However switching to reserve didn't help. Seems like if I pull the choke out I can sponge a little more power out of it but it still backfires. A day later I took the bike out again and it ran fine while cold but as soon as it warmed up the power loss again became evident. The bike currently has a little over 4000 miles. Helpful thoughts appreciated.
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