Talk:Yamaha SR250

Some one changed the displacement to 239cc. I currently own one and "249 cc" is cast into the side of the engine. The owners manual also agrees.

ENGINE TUNE-UP SPECIFICATION AND ADJUSTMENTS: AT NORMAL OPERATING TEMPERATURE, PUT VEHICLE IN THE UPRIGHT POSITION, TRANSMISSION IN NEUTRAL, AND WARM UP ENGINE.

ITEM

IGNITION TIMING

IDLE SPEED

IDLE MIXTURE

VALVE CLEARANCE

SPARK PLUG:

SPARK PLUG GAP

FUEL SPECIFICATIONS

RESEARCH OCTAINE:

ENGINE OIL:

SPEC

10degrees BTDC AT IDLE SPEED

(RPM) 1200

(MM) IN : 0.08

EX : 0.15

NGK BP7ES

(MM) : 0.7~0.8

REGULAR (LEADED)

91 MIN

SAE 20W/40 TYPE "SE"

INSTRUCTIONS

NO ADJUSTMENT

ADJUST THROTTLE STOP SCREW

NO ADJUSTMENT

SEE SERVICE MANUAL