Yamaha YZF-R125 Service Manual: Adjusting the drive chain slack
NOTE:
The drive chain slack must be checked at the tightest point on the chain.
| CAUTION: A drive chain that is too tight will overload the engine and other vital parts, and one that is too loose can skip and damage the swingarm or cause an accident. Therefore, keep the drive chain slack within the specified limits. |
1. Stand the vehicle on a level surface.
| WARNING Securely support the vehicle so that there is no danger of it falling over. |
NOTE:
Both wheels should be on the ground without a rider on the vehicle.
2. Turn the rear wheel several times and find the tightest position on the drive chain.
3. Check:
- Drive chain slack "a"
Out of specification
Adjust.
NOTE:
Measure the drive chain slack halfway between the drive axle and the rear wheel axle.
4. Adjust:
- Drive chain slack
a. Loosen the wheel axle nut "1".
b. Loosen both locknuts "2".
c. Turn both adjusting bolts "3" in direction "a" or
"b" until the specified drive chain slack is obtained.
NOTE:
- To maintain the proper wheel alignment, adjust both sides evenly
- Push the rear wheel forward to make sure there is no clearance between the drive chain pullers and the ends of the adjusting bolts.
d. Tighten the wheel axle nut to specification.
e. Tighten the locknuts to specification.
Bleeding the hydraulic brake system
WARNINGBleed the hydraulic brake system whenever:
the system is disassembled.
a brake hose is loosened, disconnected or
replaced.
the brake fluid level is very low.
brak ...
Lubricating the drive chain
The drive chain consists of many interacting
parts. If the drive chain is not maintained properly,
it will wear out quickly. Therefore, the drive
chain should be serviced, especially when the
vehi ...
Other materials:
Fuel tank cap
Fuel tank cap
Fuel tank cap lock cover
Unlock.
To remove the fuel tank cap
Open the fuel tank cap lock cover.
Insert the key into the lock and turn
it 1/4 turn counterclockwise. The
lock will be released and the fuel
tank cap can be removed.
To install the fuel tank ca ...
Installing the rear brake master cylinder
1. Install:
Copper washers "1"
Brake hose "2"
Rear brake light switch "3"
WARNINGProper brake hose routing is essential to
insure
safe vehicle operation. Refer to "CABLE
ROUTING" on page 2-33.
CAUTION:When installing the brake hose onto the
brake master ...
Checking the brake fluid level
Front brake
Front brake
Minimum level mark
Rear brake
Rear brake
Minimum level mark
Insufficient brake fluid may allow air to
enter the brake system, possibly causing
it to become ineffective.
Before riding, check that the brake fluid
is above the minimum level mark an ...