Yamaha MX250 - Periodic Maintenance; Maintenance Intervals and Schedules

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PERIODIC CHECKS AND ADJUSTMENTS
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PERIODIC CHECKS AND ADJUSTMENTS
INTRODUCTION
This chapter includes all information necessary to perform recommended checks and adjustments.
These preventive maintenance procedures, if followed, will ensure more reliable machine operation
and a longer service life. The need for costly overhaul work will be greatly reduced. This information
applies to machines already in service as well as new machines that are being prepared for sale. All
service technicians should be familiar with this entire chapter.
MAINTENANCE INTERVALS CHART
Proper periodic maintenance is important. Especially important are the maintenance services
related to emissions control. These controls not only function to ensure air filter but are also vital to
proper engine operation and maximum performance.
PERIODIC MAINTENANCE/LUBRICATION INTERVALS
Item Routine
Pre-opera-
tion check
Initial Every
1 month or
20 Hrs
3 months or
50 Hrs
6 months or
100 Hrs
12 months
or 300 Hrs
Spark plug
• Check condition.
• Clean and replace if nec-
essary.

Fuel
• Check fuel level and leak-
age.

Fuel hose
• Check fuel hose for cracks
or damage.
• Replace if necessary.

Engine oil
• Check oil level in engine. 
• Replace. 
Air filter/foam
element
• Clean.
• Check condition and
replace if necessary.
 (*1)
Spark arrester
• Check condition.
• Clean and replace if nec-
essary.

Fuel tank filter
• Clean and replace if nec-
essary.

Fuel strainer
• Clean and replace if nec-
essary.

Crankcase
breather hose
• Check breather hose for
cracks or damage.
• Replace if necessary.

Cylinder head
• Decarbonize cylinder
head.
• More frequently if neces-
sary.
After every 500 Hrs. ( )
Valve clear-
ance
• Check and adjust when
engine is cold.