Engine Shop Manuals and Service Support Materials
Like to do-it-yourself? Honda Engines offers a variety of Honda Genuine service materials for purchase. Items include:
Honda Trail 125 Forum. Welcome to the Honda Trail 125 Forum! We are an enthusiast forum for the Trail 125, Hunter Cub, CT125 or whatever it's called in your country. Feel free to join up and help us build an information resources for this motorcycle. Register a free account today to become a member. Manuale d'officina - Service Repair Manual per Honda CR 125 anno 2000 2001 2002 20030:09 1.General information1:14 2.Frame/Body panels/Exhaust System1:30.
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Please note: materials are for engines sold in the USA, Puerto Rico and the US Virgin Islands only. Non-U.S. customers can find a local distributor here.
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VALVE CLEARANCE
Inspect and adjust valve clearance while the engine is cold and the piston positioned at Top Dead Center (TDC) on compression stroke.
1. Remove the seat.
2. Remove body panels and fuel tank as necessary to gain access to valve cover.
3. Remove the spark plug high tension lead and remove the spark plug. CAUTION: Place a clean shop towel into the spark plug cavity to prevent dirt from entering.
4. Remove plastic valve plugs.
5. Remove timing inspection plug from recoil housing. CAUTION: Failure to position the crankshaft at TDC on compression stroke will result in improper valve adjustment.
6. Rotate engine slowly with recoil rope, watching the intake valve(s) open and close.
NOTE: Observe the intake valve closing and then start to open, continue to rotate until the “T” aligns with pointer. The camshaft lobes should be pointing downward.
7. Verify accurate TDC positioning by observing the “T” mark aligned with the pointer in the timing inspection hole. In this position there should be clearance on all valves.
INTAKE VALVE CLEARANCE ADJUSTMENT
Honda Cm 125 Workshop Manual
1. Insert a .006″ (.15mm) feeler gauge between end of intake valve stem and clearance adjuster screw.
2. Using Valve/Clutch Adjuster (PA--44689), loosen adjuster lock nut and turn adjusting knob until there is a slight drag on the feeler gauge.
3. Hold adjuster screw and tighten adjuster lock nut securely.
4. Re-check the valve clearance.
5. Repeat adjustment procedure if necessary until clearance is correct with locknut secured.
Honda Cm 125 Custom Service Manual
EXHAUST VALVE CLEARANCE ADJUSTMENT
NOTE: The exhaust valve is adjusted thesame as the intake valve.
1. Insert .006″ feeler gauge between end of exhaust valve stem and adjuster screw.
2. Loosen locknut and turn adjuster screw until there is a slight drag on feeler gauge.
3. When clearance is correct, hold adjuster screw and tighten locknut securely
4. Re-check the valve clearance.
5. Repeat adjustment procedure if necessary until clearance is correct with locknut secured.
6. Inspect o-rings on the plastic valve plugs, replace if damaged. Securely fasten valve plugs.
7. Reinstall fuel tank and any body panels that were removed to gain access.
Honda Cm 125 Service Manual Download
EXHAUST VALVE CLEARANCE:
0.006±0.0008I (0.15±0.02 mm) BTDC on compression