25 STANDARDS
169
JASO T903 MA
Different technical development directions required a separate specification for 4-stroke motorcycles
–
the
JASO T903 MA
standard.
Earlier, engine oils from the automobile industry were used for 4-stroke motorcycles because there was no sepa-
rate motorcycle specification.
Whereas long service intervals are demanded for automobile engines, the focus for motorcycle engines is on high
performance at high engine speeds.
In most motorcycle engines, the transmission and the clutch are lubricated with the same oil.
The
JASO MA
standard meets these special requirements.
SAE
The SAE viscosity classes were defined by the Society of Automotive Engineers and are used for classifying oils
according to their viscosity. The viscosity describes only one property of oil and says nothing about quality.
JASO FD
JASO FD is a classification for a 2-stroke engine oil that was specifically developed for the extreme demands of
racing. Thanks to first rate synthetic esters and specially designed additives, superb combustion is achieved even
under extreme operating conditions.
