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CARBURETO R SYNCHRO NIZATION
NOTE Remove both frame side covers and seat. Start the engine ;ind adjust the idl e speed to 1.100 ± 100 min·l (rpm). Pi nch the fuel valve vacuum line. then stop the engine. Turn the fuel valve OFF and remove the fuel line and fuel tank. Prepare a longer fuel line and connect it between the fuel ta nk and carburetor. Position the fuel tank higher than normal. Turn the fuel valve on.
Remove the plugs from the cy linder head intake ports and i nstall the vacuum gouge adapters. Connect the vacu um gauges.
Warm up the onginc ond adjust the idle .peed wi th the throttle stop screw.
I DLE SPEED: 1,100 ± 100 m i n 1 (rpm)
Check that the difference I n vacuum readings is between 0 and 50 mm (2.0 in) Hg.
Adjust within specifications by turning the adjusti ng screw, if necessary. The No. 1carburetor cannot be adjusted. I t is the base.
Recheck the idle speed and synchronization.
Disconnect tho gauges and remove the gauge adap ter from the port.
Install the removed parts in the reverse order of dis· OSJCmbly. H ONDA VT500C (21 VACUUM GAUGE (3) PLUG ATTACHMENT 07610-3000100 (6) CARBU R ETOR ADJUSTER WR ENCH
MAINTENANC E CA RBURETO R IDLE SPEED NOTE Warm up the engine, shi ft to neutral, and place the motorcycle on its center stand. Turn the th rottle stop screw as requi red to obtain the specified idle speed.
IDLE SPEED: 1 ,100:t 100 min-1 (rpm)
R ADIATOR COOLANT Remove the frame right side cover and reserve tank Cov e r . Check the coolant level of the reserve tan k with the engine runing at normal operating temperature.The level should be between the "UPPE R" and "LOW" level lines.
I f necessary, remove the reserve tank cap and fill to the "UPPER" level l ine with a 50/50 mixture of dis· til led water and anti-freeze.
Reinstall the cap, reserve tank cover and frame side cover.
RADIATO R CORE Check the ai r passages for clogging or damage. Straighten bent fi ns or col lapsed core tubes.
Remove insects, mud or any obstructions with compressed ai r or low water pressu re.
Replace the radiator if the air flow is restricted over more than 20% of the radiating surf ace. VT500C MAINTENANCE COOLING SYSTEM HOSES & C ONNECTIONS Make sure the hoses are in good condition; they should not have any signs of deterioration. Replac·e any hose that does.
Check that all hose clamps are tight.
CYLINDER COMPR ESSION Warm up the engine to normal operating tempera· ture. Stop the engine. disconnect both spark plug caps and remove one spark plug from each cylinder. Insert the compression gauge. Open the thrattle all the way and crank the engine with the starter motor. Crank the engine until the gauge reading stops rising. The maximum reading is usually reached within 4·7 seconds. COMPRESSION PRESSURE: 1,176 ± 196 kPa (12 ± 2 kg/cm1, 171± 28 psi) If compression is low. check for the following: Leaky valves; poor valve seating,or needs adjust· ment - Leaking cylinder head gasket - Worn piston/ring/cylinder If compression is high, it indicates that carbon deposits have accumulated on the combustion chamber and/or the piston crown.
(2) LOWER WATER HOSE VTSOOC MAINTENANCE H ONDA VT500C BATTER Y Remove the left side cover and inspect the battery fluid level. When the flu id level near the l ower level, remove the battery and add distilled water to the upper level line as follows: Remove the left side cover and seat. Disconnect the voltage regulator connectors. Remove the nut and battery holder with the regula· tor attached. Disconnect the negative terminal lead from the bat· tery first, then disconnect the positive terminal lead. Disconnect the battery breather tuM and pull out the battery. Remove the battery f iller caps. Care· fully add distil led water to the upper level mark, using a small syringe or plastic funnel.
BRAKE FLUID Check the front brake f luid reservoi r level. If the level nears the lower level mark remove the cover and dia· phram. Fill the reservoi r with DOT·3 Brake Fluid to. the upper level mark located i nside the reservoir. Check the entire system for l eaks, if the level is low. CAUTI ON Refer to section 17 for brake bleeding procedures. (1) UPPER LEVEL MAR K
MAINTENANCE
BRAKE SHOE / PAD WEAR BRAKE PAD WEAR
Check the brake pads for wear by looking through the slot indicated by the arrow cast on the caliper assembly. Replace the brake pads ii the wear line on the pads reaches the edge of the brake disc (pago 17 5).
CAUTION
Alwa ys replace the brake pads as a s er to ass11rt1 e 11en disc preuure. BRAKE SHOE WEAR
Replace the brake shoes if the arrow on the brake arm aligns with the referenc,e mark " ti ' ' on full application of the rear brake pedal ( page 16-8).
BRAKE SYSTEM I nspect the brake hoses and fittings for deterior• tion, cracks and sign of leakage. Tighten any loose fittings. Replace hoses and fittings as required.
BRAK E PEDA L HEIGHT
Adjust brake pedal height so the pedal is 25 mm (0.98 in ) above the top of the foot peg.
CAUTION
/11corre c1 broke pedo/ heig h t ca n cause broke drag . H O ND A. VTSOOC
MAINTENANCE Q\ H O NDA VTSOOC To Adjust: Loosen the stopper bolt lock nut stopper bolt. Retighten the lock nut.
NOTE
BRAKE PEDAL FREE PLAY
and turn the
NOTE
Perform brake pedal free play adjustment after adjusting brake pedal height.
Check the brake pedalfree play.
FREE PLAY : 20-30 mm {3/4-1-1/4 in)
If adjustment is necessary, tum the rear brake ad justing nut.
( l) ADJUSTING NUT
MAINTENANCE
BRAKE LIGH T SWITCH NOTE H O NDA VTSOOC
Adjust the brake light switch so that the brake light will come on when the brake pedal is depresse-d 20 mm (3/4 in), and brake engagement begins. Hold the switch body and turn the adjusting nut. Do not turn the switch body.
Adjust vertically by loosening both headlight case mounting bolts. Adjust horizontallly by loosening both adjusting bolts.
NOTE
Adjust the headlight beam as specified by local laws and regulations.
(2)MOUNTING BOLT
CLUTCH Inspoct the clutch lever free plav at the end of the lever.
FREE PLAY:10-20 mm (3/8-3/4 in)
MAINTENANCE r.:?f\ H O NDA VTSOOC Mi nor adjustmen ts a re made with the upper adjus ter.
Pull the lever cover back. loosen the lock nut and turn the adjuster to obtain the specified free play.
Tigh ten the lock nu t and install the cover. Check clutch operation.
Major adjustments are made with the lower adjuster. Turn the upper adjuster in al l the way and then back it out 1turn.
Loosen the lower lock nu t and tu rn the lower ad· juster to obtain the specified free play.
Tighten the lock nuts and check clutch operation.
SIDE STAND Check the rubber pad for deterioration or wear. Replace if any wear extends to the wear li ne as shown.
Check the side stand spring for damage and loss of tension, and thll side stand assembly for freedom of movement. Make sure the side stand is not ben t.
NOTE When replecing, use a rubber pad with the ma rk "Over 260 lbs ONLY". Spring ten slon is correct i f the measure· men ts fall within 2-3 kg (4.4-6.6 lb) stand lower end with when pulli ng the side a spring scale.
S U SPEN S ION FRONT Check tho action of the fron t forks by compressing them s.everal times. Check the en tire fork assembly for leaks or damage. Replace damaged components which cannot be repai red. Tigh ten all nuts and bol ts. Chack the front fork air pressu re when the forks are cold. Place the vehicle on its cen ter stand. Remove each air valve cap and measu re the ai r pressure. AIR PRESSURE: 1-40kPa ( 0-0.4 kg/cm1• O psi) REAR Place the motorcycle on its center stand. M ove the rear wheel sideways with force to see if the swi ng arm beari ngs are worn. Replace the bear· ings if th ere Is any looseness ( page 16·14). Check the shock absorbers for leaks or damage. Tigh ten all rear suspension nuts and bol ts.
WHEELS NOTE Tire pressure should be checked when tires are COLO.
Check the tires for cuts, imbedded nails. or other sharp objects. RECOMMENDED TIRES ANO PRESSURES:
Tiro 1l2e | 3.60S·1S:-4PR | 130/90-16 675 | ||||||||||||||
Cold t ire pressu res kPa (k.g/ cm'. psi) | Up to 90 kg (200 lbs) lood | 200 (2.00.28) | 200 (2.00. 28) | |||||||||||||
90 kg (200lbs) load 10 vehl· cit capaci tY load | 200 (2.00. 281 | 250 (2.50,361 | ||||||||||||||
Tire brand TUBELESS ONLY BRIDGESTONE DUNLOP | SRIOGE· STONE L303 DUNLOP Ell | BRIDGE· STONE G508 DUNLOP K627 | ||||||||||||||
Check the front and rear wheels for trueness (page
1S.17 and 16 5).
Measure tho treed depth at the center of the tires. Replace the tires if the tread depth reaches the fol lowi ng limits:
MINIMUM TR EAD DEPTH:
Front: 1.5 mm (1/16 in I
Rear: 2.0 mm (3/32 inI
STEER ING HEAD BEARINGS
NOTE
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