Royal Enfield Bullet Classic EFI Service Manual page 217

Observation
Electricals Related
Complaint :Poor Pickup/ Loss of Power/ Engine Overheating
General
Fuel Related
Transmission Related
Complaint :High Oil Consumption
External Leaks
Causes
Incorrect Electrode gap
Spark plug electrode dirty / fouled
Wrong specification spark plug
Loose HT connections/ damaged HT lead
Excessive pay load
Under inflated tyres
Rear Chain Adjusted too tight
Brakes are Binding
Dirty / Blocked cooling fins
Wrong spark plug specification
Torn / damaged air filter element
Wrong grade Lubrication oil
Lube oil I starvation
Engine Oil level Excess
Wheel Bearings Sticky
Throttle Cable Free play excess
Stuck throttle inner cable
Loose / damaged throttle body to engine
hose / air filter to throttle body
Suction leakage
Air filter Blocked/Dirty/Torn
Excessive carbon deposit
Fuel is stale due to vehicle being in storage
for a long period
Fuel adulterated
No fuel in the tank
Fuel pump pressure low
Fuel Injector partially blocked
No clutch cable free play.
Stuck clutch cable
Weak clutch springs
Clutch Plates Worn out/Glazed
Loose drain plug
Loose crankcase joints
Damaged gaskets
Damaged sealing surface
Remedies
Adjust the gap
Clean park plug & Reset gap.
Fit the correct Spark Plug
Fix connections firmly/ Replace
Lead.
Reduce pay load
Inflate to correct pressure
Adjust chain tension
Adjust brake
Clear and clean the fins
Replace it with correct plug
Change
Change the oil
Check and correct
Drain and correct the oil level
Clean and lubricate the bearings
Adjust throttle cable free play
Clean / Replace cable
Tighten / replace the hose
Check and correct
Check and correct
Decarbonise the engine
Clean petrol tank and carburetor
and fill the tank with fresh petrol
Refill with good fuel
Fill up the tank
Check and correct
Replace fuel injector.
Adjust clutch cable play
Clean and free and cable
Check and Replace
Check and Replace
Tighten the plugs
Tighten fasteners
Replace the gaskets
Face / Replace the parts
10-4