06-20-2020, 04:12 AM
I have read online that several Honda CB1100 owners have experienced this problem.
For several years, my 2013 Honda CB110 motorcycle would intermittently experience a rough idle. Specifically the idle would fluctuate between 1100 RPMs and 800 RPMs at about a 2 second interval.
This occurred regardless of outside air temperature, changing fuel brands, and going from 91 to 87 octane gasoline.
The solution was to remove all contents from the small compartment under the seat that covers the battery. And to use the original seat that came with my bike.
This solution is based on regulating the temperature under the seat so that the Intake Air Temperature (IAT) sensor is not overheated. The IAT is located in front of the battery and protrudes into the Rear Air Cleaner housing.
I suspect that the dense contents in the under-seat compartment was preventing the IAT from sensing the actual air temperature. And the custom seat was not allowing enough air to circulate under the seat, again allowing heat to build-up and causing false IAT readings.
After making these two changes, I have not seen the rough idle in the last several weeks.
I hope my solution will help other Honda CB1100 owners fix this frustrating and elusive problem.
For several years, my 2013 Honda CB110 motorcycle would intermittently experience a rough idle. Specifically the idle would fluctuate between 1100 RPMs and 800 RPMs at about a 2 second interval.
This occurred regardless of outside air temperature, changing fuel brands, and going from 91 to 87 octane gasoline.
The solution was to remove all contents from the small compartment under the seat that covers the battery. And to use the original seat that came with my bike.
This solution is based on regulating the temperature under the seat so that the Intake Air Temperature (IAT) sensor is not overheated. The IAT is located in front of the battery and protrudes into the Rear Air Cleaner housing.
I suspect that the dense contents in the under-seat compartment was preventing the IAT from sensing the actual air temperature. And the custom seat was not allowing enough air to circulate under the seat, again allowing heat to build-up and causing false IAT readings.
After making these two changes, I have not seen the rough idle in the last several weeks.
I hope my solution will help other Honda CB1100 owners fix this frustrating and elusive problem.