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3. Modifying
Modifying the exhaust control system may make actual exhaust emissions exceeding statutory limit values.
Illegal modification as such:
a) Dismantle or modify any part of air intake or exhaust system.
b) Modify or take off speed – adjusting connection device or speed adjustment device to result in the engines
running beyond the set parameters.
4. Problems affecting exhaust emissions
a) Difficult starting or difficult stopping.
b) Unstable idling.
c) Give off back smoke or consume too much fuel.
d) Poor ignition sparks or sparks returned.
Once you find any of above problems, contact your dealer for help.