Gilera Nordwest, Workshop Manual

Page: 90 / 136

FINAL DRIVE
Drive chain
Chain life depends on lubrication and appropriate tension. Neglecting the
above mentioned checks will result in wear and damage of both the drive and
driven sprockets thereby compromising motorcycle performance.
A chain inspection must be carried out prior to riding off. Chain adjustment
must be executed every 2,000 km.
If the motorcycle is subjected to continuous heavy operation or used mostly in
dusty areas, chain maintenance must be carried out more frequently.
Chain, drive and driven sprockets inspection
Inspect carefully the teeth on both the drive and driven sprockets and check
the condition of the chain (fig. 4).
Replace any component that shows signs of excessive wear, deformation or
other damage.
Chain check
This operation must be executed with the motorcycle unloaded, placed
vertically and repeated for the different wheel positions, in order to check
driven sprocket runout.
The lower branch, when shifted up, half way between the drive/driven
sprockets, must give a chain deflection of 35 ÷ 40 mm.
If the chain loosens, this means that some links may be damaged or frozen.
Wear condition of the links, rollers and driven sprocket teeth must be
frequently inspected.
These components must be replaced when wear limit goes beyond the
indicated values (fig. 5).
14 - 3,1