heating YAMAHA YFM80R 2002 Owners Manual

6-21
EBU00209Engine break-in
There is never a more important period in the
life of your machine than the period between
zero and 20 hours.
For this reason, we ask that you carefully read
the following material. Because the engine is
brand new, you must not put an excessive load
on it for the first several hours of running. During
the first 20 hours, the various parts in the engine
wear and polish themselves to the correct oper-
ating clearances.
During this period, prolonged full throttle opera-
tion or any condition which might result in exces-
sive engine heating must be avoided. However,
momentary (2 ~ 3 seconds maximum) full throt-
tle operation under load does not harm the
engine.
5TH-9-60 6 9/25/01 4:24 PM Page 20

8-31
NOTE:
The air filter element should be wet but not dripping.8. Install the air filter element, the air filter
case cover and the front cover.NOTE:
The air filter element should be cleaned every
20 – 40 hours. It should be cleaned and lubri-
cated more often if the machine is operated in
extremely dusty areas. Each time air filter ele-
ment maintenance is performed, check the air
inlet of the air filter case for obstructions. Check
the air cleaner rubber joint to the carburetor and
manifold fittings for an air-tight seal. Tighten all
fittings securely to avoid the possibility of unfil-
tered air entering the engine.cCNever operate the engine with the air filter
element removed. This will allow unfiltered
air to enter, causing rapid engine wear and
possible engine damage. Additionally, opera-
tion without the filter element will affect car-
buretor jetting with subsequent poor perfor-
mance and possible engine overheating.
5TH-9-60 8 9/25/01 5:50 PM Page 8-31