This table is a quick reference guide, which summarizes part of the troubleshooting process.  Use it to outline possible problem areas, then refer to the specific chapter or section involved.

                                                                                TROUBLESHOOTING GUIDE


        Item                                                    Problem or Cause                         Things to Check

        Loss of power                                   Poor compression                         Piston rings and cylinder
                                                                                                                                Head gaskets
                                                                                                                                Crankcase leaks

                                                                     Overheated engine                        Lubricating oil supply
                                                                                                                                Oil pump
                                                                                                                                Clogged cooling fins
                                                                                                                                Ignition timing
                                                                                                                                Slipping clutch
                                                                                                                                Carbon in combustion chamber

                                                                     Improper mixture                            Dirty air cleaner
                                                                                                                                Starter lever position
                                                                                                                                Restricted fuel flow
                                                                                                                                Gas cap vent hole

                                                                     Miscellaneous                                Dragging brakes
                                                                                                                                Tight wheel bearings
                                                                                                                                Defective chain
                                                                                                                                Clogged exhaust system

        Steering                                             Hard steering                                  Tire pressures
                                                                                                                                Steering damper adjustment
                                                                                                                                Steering stem head
                                                                                                                                Steering head bearings
                                                                                                                                Steering oil damper

                                                                    Pulls to one side                             Unbalanced shock absorbers
                                                                                                                                Drive chain adjustment
                                                                                                                                Front/rear wheel alignment
                                                                                                                                Unbalanced tires
                                                                                                                                Defective swing arm
                                                                                                                                Defective steering head
                                                                                                                                Defective steering oil damper

                                                                    Shimmy                                             Drive chain adjustment
                                                                                                                                Loose or missing spokes
                                                                                                                                Deformed rims
                                                                                                                                Worn wheel bearings
                                                                                                                                Wheel balance

      Gearshifting difficulties                    Clutch                                                Adjustment
                                                                                                                                Friction plates
                                                                                                                                Steel plates

                                                                    Transmission                                  Oil quantity
                                                                                                                                Oil grade
                                                                                                                                Return spring or pin
                                                                                                                                Change lever or spring
                                                                                                                                Drum position plate
                                                                                                                                Shift drum
                                                                                                                                Shift forks

      Brakes                                                 Poor brakes                                      Worn linings or pads
                                                                                                                                Brake adjustment
                                                                                                                                Oil or water on brake linings or pads
                                                                                                                                Loose linkage or cables
                                                                                                                                Low brake fluid level

                                                                    Noisy brakes                                    Worn or scratched lining or pads
                                                                                                                                Scratched brake drums or disc
                                                                                                                                Dirt in brakes

                                                                    Unadjustable brakes                      Worn linings or pads
                                                                                                                                Worn drums or disc
                                                                                                                                Worn brake cams