Engine Tune-Up; Specifications - Yamakoyo YK250 Owner's Manual

TECHNICAL & CONSUMER INFORMATION
or high-temperature operation, or use in unusually wet or dusty conditions, will require
more frequent service.

Engine Tune-up

Spark plug gap
Valve clearance
Other specifications
CONSUMER INFORMATION
Publications
These publications will give you additional information for maintaining and repairing your
engine. You may order them from your engine dealer.
Parts Catalog
This manual provides complete, illustrated parts lists.
QUICK REFERENCE INFORMATION
Type
Engine Oil
Capacity
Type
Spark Plug
Gap
Idle speed
Carburetor
Each use
Maintenance First 20 hours
Subsequent
ITEM
SAE 10W-30, API SE or SF, for general use
YK-250/300:
YK-400,YK-550/650(E):
YK-800/900/1100/1200/1300/1500(E):
F7RTC or other equivalents.
0.028-0.031 in (0.70-0.80 mm)
1400 150 rpm
Check engine oil. Check air filter.
Change engine oil.
Refer to the maintenance
31
SPECIFICATION
0.028-0.031 in
(0.70-0.80 mm)
IN: 0.15 0.02 mm (cold)
EX: 0.20 0.02mm (cold)
No other adjustments needed
0.37 US qt(0.35L)
0.63 US qt(0.6L)
1.2 US qt(I.IL)