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VALVE CLEARANCE
INSPECTION
• Inspect and adjust the valve clearance while the
engine is cold (below 35°C/95°F).
• After the valve clearance inspection, check the
engine idle speed (page 5-62).
• Inspect and adjust the valve clearance can be ser-
viced with the engine installed in the frame.
Remove the cylinder head cover (page 8-6).
Remove the timing hole cap and crankshaft hole
cap.
TOOL:
Timing cap wrench
Rotate the crankshaft counterclockwise and align
the "T" mark on the flywheel with the index notch
on the left crankcase cover.
The index line on the cam sprocket must be flush
with the cylinder head surface as shown.
Make sure the piston is at TDC (Top Dead Center) on
the compression stroke.
This position can be obtained by confirming that
there is slack in the rocker arm. If there is no slack, it
is because the piston is moving through the exhaust
stroke to TDC. Rotate the crankshaft one full turn
and match up the "T" mark again.
TIMING HOLE CAP
07709-0010001
or equivalent
CRANKSHAFT HOLE CAP
INDEX NOTCH
INDEX LINE
MAINTENANCE
"T" MARK
ROCKER ARMS
3-11
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Troubleshooting
Need help?
Do you have a question about the CBR125R and is the answer not in the manual?
Questions and answers
Hey guys I have oil dripping from crankcase overflow, very minimal, doesn’t happen on idle only when been riding for a while, I’ve done an oil change and correct amount of oil displayed on dipstick when warm, what could be the issue/options
Oil dripping from the crankcase overflow on a Honda CBR125R after riding for a while could be caused by:
1. Overfilled engine oil – too much oil can increase pressure and cause overflow.
2. Clogged or dirty oil strainer screen – this can restrict oil flow and increase internal pressure.
3. Damaged or worn sealing rubber on the oil strainer screen – may cause leaks.
4. Oil leaks not properly fixed – such as from the crankcase cover or other seals.
Check oil level, clean the strainer screen, inspect seals, and ensure proper installation.
This answer is automatically generated
Hello there, my name is Traydon I have been riding for about 2 months now I’m completely new to keeping motorbikes Recently I’ve had an issue with my motorbike it’s a Honda cbr 125cc 2011 model. I have an idle problem will start but struggles to keep idle and have to keep using the throttle from it not cutting out it also cuts out at traffic lights due to not liking to stop Revving. Tray.
The idle problem in a 2011 Honda CBR125R that struggles to maintain idle and cuts out at traffic lights could be caused by an issue with the air cut valve or air cut system in the carburetor. Even after a carb rebuild with new jets and seals, the problem persisted until attention was given to this specific component. A faulty or malfunctioning air cut valve can cause over-revving, poor idling, and stalling when coming to a stop.
This answer is automatically generated