Join Date: Jul 2017
Location: Drumbo, Ontario, Canada
Decel pops are typically misfires caused by a lean mixture. However, they can also be caused by air leaks into the exhaust, such as a leak at the header connection to the engine. Best to confirm there are no exhaust leaks before chasing fueling issues.
I haven't checked my TPS voltages (yet), but since installing a Thermo-Bob this past winter, the decel misfires have been virtually eliminated from my 2011. Even when riding in temps down close to freezing. It appears that the fuel injection is calibrated lean, and the cooling system keeps the engine cold rather than at operating temperature. I'm not a fan of excessively cooling an internal combustion engine as it defeats the purpose.
Adjusting the TPS voltages beyond specs may reduce the symptoms, but it won't correct the underlying problem.
2011 V650 in Black, well accessorized.