Triumph Tiger Explorer XR 2017 Service Manual page 344

Tiger Explorer XR Series
secondary air system where, each time a pair of exhaust valves open, the exhaust gases in the exhaust port
create a depression which causes reed valves in the secondary air injection system to open. When open, the
depression in the exhaust port draws air from the control valve, through the open reed valves, into the exhaust
port. This air promotes secondary combustion of the exhaust gases in the ports and the header system.
At other engine speeds, the system is disabled by closing the control valve in the system. This allows an oxygen
sensor to control air to fuel ratios. If air was fed to the exhaust system when the oxygen sensor was operational,
the incoming air would cause inaccuracies in the readings sensed by the oxygen sensor (which requires access
to 'raw' combustion gases) which would lead to rough running.
Secondary Air Injection Solenoid Valve - Removal
Before starting work, ensure the motorcycle is stabilised and adequately supported. This will help prevent it
from falling and causing injury to the operator or damage to the motorcycle.
Remove the rider's seat (see Rider's Seat - Removal).
Disconnect the battery, negative (black) lead first.
Remove the fuel tank (see Fuel Tank - Removal).
1. Release the hose attached to the valve.
2. Disconnect the electrical connector, release the fixings and remove the valve.
Secondary Air Injection Solenoid Valve - Installation
Before starting work, ensure the motorcycle is stabilised and adequately supported. This will help prevent it
from falling and causing injury to the operator or damage to the motorcycle.
1. Carefully fit the solenoid valve to the airbox, ensure that its seal remains fitted to the airbox.
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1. Electrical connector
2. Fixings
3. Valve
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FUEL SYSTEM / ENGINE MANAGEMENT