Yamaha YZ125/LC Manuel D'atelier Du Proprietaire page 534

Masquer les pouces Voir aussi pour YZ125/LC:

Change of the heat range of spark plugs

Judging from the discoloration of spark plugs, if

they are found improper, it can be corrected by

the following two methods; changing carburetor

settings and changing the heat range of spark

Standard spark plug

9 In principle, it is advisable to first use spark

plugs of standard heat range, and judging from

the discoloration of spark plugs, adjust carbure-

tor settings.

9 If the calibration No. of the main jet must be

changed by ±30, it is advisable to change the

heat range of spark plugs and newly select the

proper main jet.

9 When checking the discoloration of spark

plugs, be sure to stop the engine immediately

after a run and check.

9 Avoid racing.

9 When changing the heat range of spark plugs,

never attempt to change it more than ±1 rank.

9 When using a spark plug other than standard,

check its heat range against the standard and

check that it is a resistance type.

9 Note that even if the discoloration seems prop-

er, it may slightly vary with the spark plug

maker and oil in use.

(resistance type)