APRILIA RS 125 Euro 4 Service Manual page 255

RS 125 - Tuono 125 - Euro 4
Removing
•
Support the vehicle with the optional
rear stand.
•
Loosen the chain tension, by unscrew-
ing the rear adjuster screws.
•
Identify the master link; slide off the
clip.
•
Remove the plate underneath.
•
Collect the chain.
CAUTION
REPLACE THE ENTIRE UNIT IF THE CHAIN IS PARTICU-
LARLY WORN.
See also
Adjusting
inspection
Also check the following parts and check that the chain, the front sprocket and the rear sprocket do not
have:
- Damaged rollers.
- Loosened pins.
- Dry, corroded, crushed or seized links.
- Excessive wear.
- Excessively worn or damaged front or rear sprocket teeth.
CAUTION
IF ANY DAMAGED CHAIN ROLLERS AND/OR LOOSENED PINS ARE FOUND, THE ENTIRE
CHAIN SET (FRONT SPROCKET, REAR SPROCKET AND CHAIN) MUST BE REPLACED.
LUBRICATE THE CHAIN EVERY 500 km (310.69 mi), ESPECIALLY IF ANY DRY OR RUSTY PARTS
ARE NOTED.
CRUSHED OR SEIZED LINKS MUST BE LUBRICATED AND RESTORED TO PROPER WORKING
ORDER.
The vehicle has a chain with a 1/2" pitch closed
using a link.
With wear, the chain lengthens. Replace the chain
if there is lengthening equal to or more than 2%.
To check the chain wear, use the Ognibene
529510001 ruler and follow the instructions below:
•
Tension the chain
•
Place the Ognibene 529510001 ruler
on the chain rollers, in a section formed
by eight chain steps
Chassis
CHAS - 255