Yamaha XMAX YP250R Service Manual download pdf (Page 364)

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TRBL

SHTG

POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE/

FAULTY CLUTCH

EAS00849

POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE

Refer to “STARTING FAILURE/HARD STARTING”.

ENGINE

Air filter

• Clogged air filter element

Air intake system

• Bent, clogged or disconnected carburetor

air vent hose

• Clogged or leaking air duct

FUEL SYSTEM

Carburetor

• Faulty diaphragm

• Incorrect fuel level

• Loose or clogged main jet

EAS00853

FAULTY CLUTCH

ENGINE OPERATES BUT VEHICLE WILL

NOT MOVE

V-belt

• Bent, damaged or worn V-belt

• Slipping V-belt

Primary pulley cam and primary pulley

slider

• Damaged or worn primary pulley cam

• Damaged or worn primary pulley slider

Clutch spring(s)

• Damaged clutch spring

Transmission gear(s)

• Damaged transmission gear

CLUTCH SLIPS

Clutch shoe spring(s)

• Damaged, loose or worn clutch shoe spring

Clutch shoe(s)

• Damaged or worn clutch shoe

Primary sliding sheave

• Seized primary sliding sheave

POOR STARTING PERFORMANCE

V-belt

• V-belt slips

• Oil or grease on the V-belt

Primary sliding sheave

• Faulty operation

• Worn pin groove

• Worn pin

Clutch shoe(s)

• Bent, damaged or worn clutch shoe

POOR SPEED PERFORMANCE

V-belt

• Oil or grease on the V-belt

Primary pulley weight(s)

• Faulty operation

• Worn primary pulley weight

Primary fixed sheave

• Worn primary fixed sheave

Primary sliding sheave

• Worn primary sliding sheave

Secondary fixed sheave

• Worn secondary fixed sheave

Secondary sliding sheave

• Worn secondary sliding sheave

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