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ETON America MATRIX R4-150 Service Manual Covers: MATRIX R4-150 (PN2I) SCOOTER

2.3 FUEL TUBE Inspect the fuel lines for deterioration, damage, or leaking, and replace if necessary. 2.4 THROTTLE OPERATION Inspect the hand grip f

2.6 AIR CLEANER Unscrew the air cleaner cover screws. Pull out the air filter from the air cleaner case. Wash the component in non-flammable solvent

Inspect the rear and brake lever and cable for excessive play or other damage. Replace or repair if necessary. Measure the free play of the brake le

2.12 ENGINE STOP SWITCH 2.13 UPPER – LOWER BEAM CONTROLLER This controller is located beside right handle bar. This controls the headlight. The en

3. ENGINE REMOVAL AND INSTALLATION 3.1 ENGINE REMOVAL Remove the seat, helmet box, and body cover. Disconnect the oil tube, fuel tube, and vacuu

Disconnect the carburetor and throttle cable wires. Remove the spark plug cap. Remove the muffler by removing the retaining bolts.

Remove the air cleaner by removing the retaining bolts as shown. Remove the bolt at the bottom of the rear shock absorber. Remove the rear disc brak

Remove engine hanger nut. Remove the engine from the frame. 3.2 ENGINE INSTALLATION Install engine in reverse order of disassembly. Torque value: M

4. CYLINDER HEAD AND VALVES 4.1 SERVICE INFORMATION GENERAL This section describes maintenance for the cylinder head, valves, camshaft, and related

4.2 TROUBLE SHOOTING Engine top-end problems usually affect engine performance. These problems can be diagnosed by a compression test, or by tracing

CONTENTS1. INFORMATION ... 4 1.1 SAFETY

Remove the air cleaner and carburetor. Remove the inlet pipe assembly. Remove the shroud compositions. Loosen the cam chain adjuster screw. Remove t

INSPECTION Inspect the cam lobes surface and height of cam lobes for wear or damage. SERVICE LIMIT: IN 29.395 mm EX 29.160 mm Inspect the camshaft

4.4 CYLINDER HEAD REMOVAL Remove the flange bolts and cylinder head. Remove the cylinder head gasket and dowel pins. Remove the cam chain guide. Me

CYLINDER HEAD DISASSEMBLY Remove the valve cotters, spring retainers and valve springs with a valve spring compressor. INSPECTION Clean off all carb

Inspect each valve for turning, burning, scratches or abnormal stem wear. Check the valve movement in the guide. Measure and record each valve stem

INSTALLATION Install the new gasket and dowel pins. Install the cam chain guide. Install the cylinder head. CAMSHAFT COMPOSITION INSTALLATION Instal

Align the “T” mark on the flywheel with the index mark on the alternator cover by turning the flywheel counter- clockwise. Position the camshaft gea

Loosen the cam chain-adjusting bolt with counter clockwise direction and install the o-ring and screw. Install the cylinder head cover.

5. LUBRICATION 5.1 SERVICE INFORMATION GENERAL This section describes inspection and replacement of the engine oil, oil filter screen and assembly o

OIL DRAIN BOLT 20-30 N.m 5.2 TROUBLESHOOTING Oil level too low  Normal oil consumption.  External oil leaks.  Oil not changed often enough.

9.6 REAR SHOCK ABSORBER DRAWING ... 64 10. PLASTIC PARTS ...

Remove the oil filter cap, spring and oil filter screen. Check the O-ring for damage or fatigue. Install a new oil filter screen and spring then ins

Remove the cooling fan assembly. Remove the AC generator assembly. Remove the right crankcase cover. Remove the starting clutch outer and gear assy.

Remove the flange bolts and oil separator. Remove the oil pump chain and oil pump driven sprocket. Remove the oil pump assy. Disassemble the oil pum

INSPECTION Measure the oil pump rotor-to-body clearance. SERVICE LIMIT: 0.12 mm Install the oil pump shaft and measure the pump rotor tip clearance

Install the oil pump assembly. Install the oil separator. Install the starting clutch outer and gear assembly. OIL SEPARATORInstall the oil pump dr

Install the new gasket, dowel pins, and right crankcase cover. Install the AC generator assembly and cooling fan composition.

6. CYLINDER / PISTON 6.1 SERVICE INFORMATION GENERAL Camshaft lubrication oil is fed to the cylinder head through an oil orifice in the cylinder he

6.3 CYLINDER REMOVAL Remove the cylinder head. Remove the cylinder. Remove the cylinder gasket and dowel pins. Clean off any gasket materials from t

6.4 PISTON REMOVAL Stuff a shop towel into the crankcase. Remove the piston pin clip with needle nose pliers. NOTE: Do not allow the clip fall into

Measure and record the cylinder I.D. at three levels in both an X and Y-axis. Take the maximum reading to determine the cylinder wear. SERVICE LIMIT

1. INFORMATION 1.1 SAFETY ● Gasoline is extremely flammable and is explosive under certain conditions. Do not smoke or allow sparks or flames in

Inspect the piston for wear or damage. Insert each piston ring into the cylinder and measure the ring end gap. NOTE: Push the rings into the cylinde

Calculate the piston-to-piston pin clearance. SERVICE LIMIT: 0.02 mm Measure the connecting rod small end I.D. SERVICE LIMIT: 15.06 mm 6.5 PISTON I

PISTON INSTALLATION Install the piston with it’s “IN“ mark on the intake valve side. Install the piston pin with new pin clips. Do not align the pis

Coat the cylinder bore and piston rings with engine oil and install the cylinder. NOTE: Avoid piston rings damage cylinder bore during installation.

7. TRANSMISSION / KICK STARTER 7.1 SERVICE INFORMATION If the drain tube assembly fills with water, the tube should be drained. SPECIFICATIONS mm IT

7.3 C.V.T DISASSEMBLY L CRANK CASE COVER REMOVAL Loosen the band screw and remove the C.V.T inlet duct. Disassemble the ground wire as shown. Remove

Remove the gasket and dowel pins. Clean off any gasket material from L crank case surface. CVT REMOVAL Loosen the flange nut and remove kick-start

Remove the ramp plate and weight roller set. Loosen the special nut and remove the driven plate composition and driven face spring. INSPECTION Ins

Measure the I.D. of movable driven face. SERVICE LIMIT: 28.03mm Inspect the drive face collar for wear or damage. Measure the I.D. of drive face col

Measure the length of driven face spring. SERVICE LIMIT: 164.0 mm Inspect the driven face assy. and replace them if necessary. 7.4 KICK STARTER DIS

1.3 SERIAL NUMBER The frame serial number is stamped on the front of the frame, just at the front of footrest plate. The engine serial number is sta

Rotate the kick-starter spindle composition to remove the kick driven gear and spring. Remove the kick-starter spindle composition and return spring

Inspect the machining surface for wear or damage. 7.5 KICK STARTER ASSEMBLY Install the kick spindle bush, return spring and spindle assembly. Inst

Assemble the movable driven face composition, weight roller set, and drive face. Install the movable drive face assembly and boss. Install the drive

Install the dowel pins and gasket. Install the L crank case cover. Install the gas waste recovery and C.V.T ducts.

7.7 ELECTRIC SELF-STARTER MECHANISM 7.8 KICK STARTER This kick-starter arm is on the left side of engine. When the kick-starter a

7.9 REMOVAL OF CVT SYSTEM Remove the engine clutch cover by unscrewing the fixed bolts. Check the belt for wear. If necessary, replace the belt. Dis

8. FRONT WHEEL, BRAKES, AND STEERING SYSTEM 8.1 TROUBLESHOOTING STEERING IS HEAVY  DAMAGED STEERING BEARINGS  DAMAGED STEERING BEARING RACES 

8.3 REPLACE SPEEDOMETER CABLE Disassemble the handlebar cover. Unscrew the speedometer cable nut. Unscrew the speedometer cable fixing bolt on the f

Loosen the handlebar fixing nut and bolt on the front fork. Remove the handlebar. Install a new handlebar in reverse order of removal. Locking nut

FRONT WHEEL AXLE BEARING INSPECTIONREPLACING THE FRONT DISK BRAKE CALIPER ASSEMBLY Unscrew the two front disk brake caliper fixing bolts at the fro

1.4 TORQUE VALUES FRAME Part to tightened Threadsize Tightening torque Remarks N-m kg-m ft.lb Handlebar upper holder bolt M10 30-40 3.0-4.0 22.1-29.

DISASSEMBLING FRONT BRAKE DISK Disassemble the front wheel. Unscrew the three brake disk fixing bolts. Release the brake disk. Torque of these M8 n

9. REAR WHEEL AND BRAKE SYSTEM 9.1 TROUBLESHOOTING BAD BRAKE PERFORMANCE  WORN BRAKE SHOES  BRAKE ADJUSTED IMPROPERLY  BRAKE LININGS OILY,

9.3 REAR WHEEL REMOVAL Remove the bolt at the bottom of the rear shock absorber. Unscrew the rear bracket bolt. Unscrew the rear wheel axle nut. Di

9.4 INSPECTING THE REAR WHEEL Measure the warping or distortion of the rear wheel rim. Replace with a new rim if the distortion is over 2.0 mm. 9.5

Remove the rear disc brake caliper. When reinstalling the caliper: Torque value: M8 nut 24-30 N-m BRAKE DISC INSPECTION Measure the thickness of

9.6 REAR SHOCK ABSORBER DRAWING

10. PLASTIC PARTS 10.1 FRONT FENDER Unscrew the 7 fixing screws between the front fender and leg shield. Remove the front fender. 10.2 BODY COVE

Open the seat. Unscrew the 4 fixing bolts on the helmet box. Remove the helmet box. Unscrew the upper body cover fixing bolts. Unscrew the fixing bo

Open and remove the fuel tank cap. Unscrew the 2 rear cover fixing bolts near the fuel tank. Unscrew the 2 tail light fixing bolts near the fuel tan

Remove the right and left side protecting covers. Unscrew the 5 leg shield fixing bolts. Unscrew the 6 fixing bolts on the footrest board. Remove th

ENGINE Part to tightened Threadsize Tightening torque Remarks N-m kg-m ft.lb Spark plug M10 10-12 1.0-1.2 7.4-8.9 Cylinder head bolts M6 10-14

10.3 CANISTER COMP REMOVAL AND INSTALLATION Suggested: Change the canister composition every 2 years or 9000 miles (15000km). 3. CARBURETOR ASSY. 5

11. ELECTRICAL SYSTEM 11.1 TROUBLESHOOTING ENGINE STARTS BUT STOPS  IMPROPER IGNITION TIMING  FAULTY SPARK PLUG NO SPARK AT PLUG  ENGINE STOP

11.2 IGNITION COIL Remove the spark plug cap from the spark plug. Disconnect the ignition coil primary wire. Measure the primary coil resistance.

11.4 CHARGING Connect the charger’s positive cable to the battery position terminal. Connect the charger’s negative cable to the battery negative t

11.6 WIRING DIAGRAM MATRIX R4-150

2. MAINTENANCE 2.1 MAINTENANCE DATA SPECIFICATIONS SPARK PLUG GAP 0.6-0.7 mm RECOMMENDED SPARK PLUGS NGK CR7HSA THROTTLE LEVER FREE PLAY 5-10 mm

Maintenance Schedule Four Stroke Vehicles WP-0027 ScheduledMaintenance300KM Every1000KM Every3000KM Every6000KM Every12000KM200Miles