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Click here to see/hide ENGINE problems
- Cranking Motor Doesn't Operate or Doesn't Turn Engine Over
- Engine RUN Switch in OFF position
- Ignition Switch NOT ON
- Discharged Battery, loose or corroded connections (solenoid chatters)
- Electric Starter Shaft pinion not engaging
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- Engine Turns Over but Doesn't Start
- Empty Fuel Tank
- Fuel Supply Valve OFF
- Fuel Supply Valve or filter clogged
- Engine flooded as a result of overchoking
- Discharged Battery, loose or corroded connections
- Fouled Spark Plugs
- Spark Plug cables loose or in bad condition
- Loose wire connection at coil, battery connection or at plug between ignition module and sensor
- Damaged ignition coil
- Damaged ignition module or sensor
- Sticking or damaged valve or tappets too tight
- Ignition Timing badly out of adjustment
- Engine or transmission lubricant too heavy
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- Starts Hard
- Spark Plugs in bad condition or partially fouled or have improper gap
- Spark Plug Cables in bad condition
- Battery nearly discharged
- Loose wire at coil or one of battery connections
- Carburetor controls not adjusted correctly
- Damaged ignition coil
- Fuel tank Cap Vent plugged or carb fuel line closed off
- Water or dirt in fuel system and carb
- Choke disc stuck in OPEN position
- Air leak at intake manifold
- Ignition not timed correctly
- Engine or transmission lubricant too heavy
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- Starts but Runs Irregularly or Misses
- Spark Plugs in bad condition or partially fouled
- Spark Plug Cables in bad condition and leaking
- Spark Plug Gap too close or too wide
- Damaged ignition coil
- Damaged ignition module or censor
- Battery nearly discharged
- Damaged wire or Loose wire connection at coil, battery connection or at plug between ignition module and sensor
- Intermittent Short Circuit due to damaged wire insulation
- Fuel tank Cap Vent plugged or carb fuel line closed off
- Water or dirt in fuel system and carb
- Air leak at intake manifold or air cleaner
- Carburetor controls not adjusted correctly
- Incorrect valve timing
- Weak or broken valve springs
- Damaged intake or exhaust valve
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- Spark Plug Fouls Repeatedly
- Fuel mixture too rich (carb)
- Incorrect Spark Plugs for the kind of service
- Piston rings badly worn or broken
- Valve Guides badly worn
- Valve guide Seals badly worn
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- Pre-Ignition or Detonation (Knocks or Pings)
- Damaged Spark Plugs
- Incorrect Spark Plugs
- Fuel Octane rating too low
- Ignition timing advanced
- Excessive carbon deposit on piston head or in combustion chamber
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- Overheating
- Insufficient oil supply or oil not circulating
- Ignition timing retarded
- Heavy carbon deposit
- Leaking Valves
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- Valve Train Noise
- Low pressure caused by oil feed pump not functioning properly or oil screen obstructed
- Defective hydraulic tappets
- Valve sticking in guide
- Bent push rod
- Cam or pinion gears worn
- Rocker arm binding on shaft
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- Excessive Vibration
- Loose or corroded battery connections
- Ignition module not properly grounded
- Wheels, sprockets and or tyres damaged
- Front or rear chain/belt badly worn or links tight as a result of insufficient lubrication
- Upper mounting bracket loose, broken or improperly spaced
- Lower mounting bolts loose
- Transmission and/or transmission sub-mounting plate loose in chassis
- Internal engine problem
- Broken frame
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Click here to see/hide LUBE SYSTEM problems
- Oil Doesn't Return to Oil Tank
- Oil tank EMPTY
- Restricted Oil Filter
- Restricted Oil Lines or Fittings
- Oil feed pump not working
- Scavenger pump gear key sheared
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- Engine Uses to Much Oil or Smokes Excessively
- Valve Giudes or Valve Guide Seals worn
- Piston Rings badly worn or broken
- Breather valve incorrectly timed
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- Engine Leaks Oil from Cases, Push Rods, Hoses, etc.
- Loose parts
- Imperfect seal at gaskets, push rod cover, washers etc.
- Restricted oil return line to tank
- Restricted breather hose to Air Cleaner
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- Excess Oil Out of Crankcase Breather(Air Cleaner)
- Oil not returning to tank
- Restricted Oil return line to tank
- Restricted Oil filter
- Oil lines or passages restricted
- Gearcase cover gasket not sealing
- Leakage between passages and pockets in Gearcase Cover and Gearcase
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- Excess Oil Out of Crankcase Breather When Starting Engine
- Oil pump check ball stuck open
- Poor seal between feed and return gear in pump
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Click here to see/hide ELECTRICAL problems
- Alternator Doesn't Charge
- Damaged rectifier-regulator module
- Module not grounded
- Loose or broken wires in charging circuit
- Damaged Stator Coils
- Damaged Rotor
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- Alternator Charge Rate is Below Normal
- Loose or corroded connections
- Weak or damaged battery
- Damaged rectifier-regulator module
- Loose or broken wires in charging circuit
- Damaged Stator Coils
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Click here to see/hide CARB problems
- Floods
- Inlet Valve Sticking
- Inlet Valve and/or valve seat worn or damaged
- Dirt or other foreign matter between valve and its seat
- Excessive 'pumping' of hand throttle grip
- Leaky or damaged float
- Float misadjusted
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Click here to see/hide TRANNY problems
- Shifts Hard
- Bent Shifter Rod
- Clutch dragging slightly
- Shifter forks (inside transmission) sprung
- Corners worn off shifter clutch dogs (inside transmission)
- Transmission lubricant too heavy
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- Jumps Out of Gear
- Shifter Rod improperly adjusted
- Shifter forks (inside transmission) improperly adjusted
- Shifter engaging parts (inside transmission) badly worn and rounded
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Click here to see/hide CLUTCH problems
- Slips
- Clutch controls improperly adjusted
- Insufficient Clutch spring tension
- Worn friction discs
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- Drags or Doesn't Release
- Clutch controls improperly adjusted
- Insufficient Clutch spring tension
- Clutch discs warped
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- Chatters
- Friction or Steel discs worn or warped
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Click here to see/hide BRAKES problems
- Don't Hold Normally
- Master cylinder low on fluid
- Brake line contains air bubbles
- Master cylinder or caliper piston worn or parts damaged
- Brake Pads contaminated with grease or oil
- Brake Pads badly worn
- Brake Disc badly worn or warped
- Brake fades due to heat build up - Pads dragging or excessive braking
- Brake drags - insufficient brake pedal or hand lever free play
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Click here to see/hide HANDLING problems
- Irregularities
- Off-centre loading
- Heavy front end loading
- Tires improperly inflated
- Irregular or peaked front tire wear
- Tire and wheel unbalanced
- Improper wheel alignment
- Loose wheel axle nuts
- Steering Head Bearings adjustment
- Rims and tires out of round or eccentric with hub
- Rims and tires out of true sideways
- Excessive wheel hub bearing play
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