Yamaha YZF-R125 Owners Manual: Engine break-in
There is never a more important period in the life of your engine than the period between 0 and 1000 km (600 mi). For this reason, you should read the following material carefully.
Since the engine is brand new, do not put an excessive load on it for the first 1000 km (600 mi). The various parts in the engine wear and polish themselves to the correct operating clearances. During this period, prolonged full-throttle operation or any condition that might result in engine overheating must be avoided.
0-500 km (0-300 mi)
Avoid prolonged operation above 6000 r/min.
After every hour of operation, stop the engine, and then let it cool for five to ten minutes.
Vary the engine speed from time to time. Do not operate the engine at one set throttle position.
500-1000 km (300-600 mi)
Avoid prolonged operation above 8000 r/min.
Rev the engine freely through the gears, but do not use full throttle at any time. NOTICE: After 1000 km (600 mi) of operation, the engine oil must be changed, the oil filter cartridge or element replaced, and the oil strainer cleaned.
1000 km (600 mi) and beyond
The vehicle can now be operated normally.
NOTICE
- Keep the engine speed out of the tachometer red zone.
- If any engine trouble should occur during the engine break-in period, immediately have a Yamaha dealer check the vehicle.
Tips for reducing fuel consumption
Fuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:
Shift up swiftly, and avoid high engine
speeds during acceleration.
Do not r ...
Parking
When parking, stop the engine, and
then remove the key from the main
switch.
WARNING
Since the engine and exhaust
system can become very hot,
park in a place where pedestrians
or ch ...
Other materials:
Checking the starter motor
1. Check:
Commutator
Dirt Clean with 600 grit
sandpaper.
2. Measure:
Commutator diameter "a"
Out of specification Replace
the starter
motor.
3. Measure:
Mica undercut "a"
Out of specification Scrape
the mica to the
proper measurement with a hacksaw blade
...
Periodic maintenance and lubrication chart
NOTE:
The annual checks must be performed every year, except if a
kilometer-based maintenance,
or for the UK, a mileage-based maintenance, is performed instead.
From 30000 km (17500 mi), repeat the maintenance intervals starting
from 6000 km (3500 mi).
Items marked with an asterisk s ...
Assembling the front brake caliper
WARNING
Before installation, all internal brake components
should be cleaned and lubricated
with clean or new brake fluid.
Never use solvents on internal brake components
as they will cause the brake caliper
dust seals and piston seals to swell and
distort.
...