Royal Enfield CONTINENTAL GT 650 TWIN 2018, Service Training Manual

Page: 135 / 198

ROYAL ENFIELD 650 TWIN SERVICE TRAINING MANUAL
134
EMISSION SYSTEM
1 Fuel tank
2 Hose charcoal canister to EVAP purge control
valve
3 Hose tank to canister
4 Hose purge valve to throttle body
5 Charcoal canister
6 Throttle body
7 EVAP purge control valve
8 EMS / ECU
EVAPORATIVE EMISSIONS
CONTROL SYSTEM (EVAP)
Royal Enfield twin cylinder motor
cycles are equipped with an
Evaporative (EVAP) Emissions
Control System.
The EVAP system prevents fuel
hydrocarbon vapors from
escaping into the atmosphere.
When the engine is running, EMS
(8) controls the EVAP purge valve
(7) operation. When hydrocarbon
vapors (gas fumes) accumulate in
the fuel tank (1) they are
transferred to charcoal canister
(5) through a vacuum hose.
(3) Hydrocarbon vapors (gas
fumes) are condensed by the
charcoal canister and transferred
back to throttle body
(6) through a vacuum hose (4).
Inspection

Clean and inspect any damage or crack on canister
housing, inlet and outlet ports.

Inspect the canister weight on hand. If it seems
heavy, there may be fuel flooding. Replace if
necessary.

New Canister dry weight 380 to 390 grams
approx.
EVAP Purge Control Valve

Locate the EVAP purge
control valve under
the battery tray.
Inspection

Clean and visually
inspect the EVAP purge control valve for any
damage or crack.
NOTE

EVAP purge control valve works with EMS
commands based on engine speed and throttle
conditions.

Basically purge valve works only in one direction.
1
6
3
2
4
5
7
8