Serial Numbers - Honda CBR125R Owner's Manual

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SERIAL NUMBERS

The Vehicle Identification Number (VIN) is stamped on the right side of
the steering head.
The registered number plate is located on the right side of the frame
(Except CM and U type).
The engine serial number is stamped on the lower left side of the
crankcase.
The throttle body identification number is stamped on the right side of
the throttle body.
GENERAL INFORMATION
VIN
REGISTERED NUMBER PLATE
ENGINE SERIAL NUMBER
THROTTLE BODY IDENTIFICATION NUMBER
1-3

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Questions and answers

Steven young
April 7, 2025

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

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1 comments:
Mr. Anderson
April 9, 2025

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.

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Traydon Thursting
April 13, 2025

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.

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1 comments:
Mr. Anderson
April 13, 2025

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.

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