Honda TRANSALP XL600-650V (1987-2002) [284/291] Fault finding

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Fault Finding REF 37 1 Engine doesn t start or is difficult to start continued Compression low Spark plugs loose Remove the plugs and inspect their threads Reinstall and tighten to the specified torque Chapter 1 Cylinder head s not sufficiently tightened down If a cylinder head is suspected of being loose then there s a chance that the gasket or head is damaged if the problem has persisted for any length of time The head nuts bolts should be tightened to the proper torque in the correct sequence Chapter 2 Improper valve clearance This means that the valve is not closing completely and compression pressure is leaking past the valve Check and adjust the valve clearances Chapter 1 Cylinder and or piston worn Excessive wear will cause compression pressure to leak past the rings This is usually accompanied by worn rings as well A top end overhaul is necessary Chapter 2 I Piston rings worn weak broken or sticking Broken or sticking piston rings usually indicate a lubrication or carburation problem that causes excess carbon deposits or seizures to form on the pistons and rings Top end overhaul is necessary Chapter 2 l Piston ring to groove clearance excessive This is caused by excessive wear of the piston ring lands Piston replacement is necessary Chapter 2 Cylinder head gasket s damaged If a head is allowed to become loose or If excessive carbon build up on the piston crown and combustion chamber causes extremely high compression the head gasket may leak Retorquing the head is not always sufficient to restore the seal so gasket replacement is necessary Chapter 2 Cylinder head s warped This is caused by overheating or improperly tightened head nuts bolts Machine shop resurfacing or head replacement is necessary Chapter 2 Valve spring broken or weak Caused by component failure or wear the springs must be renewed Chapter 2 Valve not seating properly This is caused by a bent valve from over revving or improper valve adjustment burned valve or seat improper carburation or an accumulation of carbon deposits on the seat from carburation or lubrication problems The valves must be cleaned and or replaced and the seats serviced If possible Chapter 2 Stalls after starting Improper choke action Make sure the choke plungers are staying in the out position Chapter 4 Ignition malfunction Chapter 5 Carburettor malfunction Chapter 4 Fuel contaminated The fuel can be contaminated with either dirt or water or can change chemically if the machine is allowed to sit for several months or more Drain the tank and float chambers Chapter 4 I I Intake air leak Check for loose carburettor to lntake manifold connections loose vacuum gauge adapter screws or hoses as applicable or loose carburettor tops Chapter 4 Engine idle speed incorrect Turn idle adjusting screw until the engine idles at the specified rpm Chapter 1 Rough idle Ignition malfunction Chapter 5 Idle speed incorrect Chapter 1 Carburettors not synchronised Adjust carburettors with vacuum gauge or manometer set as described in Chapter 1 I I Pilot jet or air passage clogged Remove and overhaul the carburettors and check jet sizes Chapter 4 I Fuel contaminated The fuel can be contaminated with either dirt or water or can change chemically if the machine is allowed to sit for several months or more Drain the tank and float chambers Chapter 4 Intake air leak Check for loose carburettor to intake manifold connections loose vacuum gauge adapter screws or hoses as applicable or loose carburettor tops Chapter 4 Air filter clogged Replace the air filter element Chapter 1