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Honda CB100 engine INTRODUCTION


Filed Under (Honda) by admin on 13-11-2011

Fuel Injection System for One Cylinder Motor Cycle Engine. Fuel injection has been developed for many years. But its common application is limited on car’s engine. With many reason fuel injection systems in motorcycle one cylinder engine has not been widely used yet. Fuel Injection System allows the amount of fuel, injected to be controlled appropriate to engine parameters such as engine speed, amount of air inducted to cylinder, temperature, for each cycle, over the entire engine operating conditions. This fuel injection research is done to find out the Volumetric Efficiency of the intake manifold system, the amount of fuel need to be injected for each engine cycle, and the engine characteristics over variation of test conditions. This research based on Honda CB100 engine, at applied thermodynamic Laboratory of Mechanical Engineering Department, Faculty of Engineering University of Indonesia. Experiment data from this
research shows the characteristics of injector duration as functions of engine speed, intake pressure, on one cylinder engine and the results of this research shows a good Volumetric Efficiency of the intake manifold designed using CFD (Computational Fluid Dynamic)

HONDA CT110 SERIES MOTORCYCLE Cold engine Starting Procedure


Filed Under (Honda) by admin on 15-11-2011

Prime the engine before starting by cranking the engine several times with the kick starter. The ignition switch should be OFF, the choke lever Fully ON (A) and the throttle opened slightly. Flooded Engine If the engine fails to start after several repeated attempts, it may have become flooded with excess fuel. To clear the engine, turn off the engine stop switch and lower the choke lever to Fully OFF (B). Open the throttle fully and crank the engine several times with the kick starter. Turn the engine stop switch to RUN and open the throttle slightly; start the engine using the kick starter When service is required, remember that your authorized Honda dealer knows your motorcycle best and is fully equipped to maintain and repair it. The scheduled maintenance may also be performed by a qualified service facility that normally does this kind of work; or you may perform most of the work yourself it you are mechanically qualified and have the proper tools
and service data. • These instructions are based on the assumption that the motorcycle will be used exclusively for
its designed purpose. Sustained high speed operation, or operation in unusually wet or dusty conditions, will require more frequent service than specified in the MAINTENANCE SCHEDULE. Consult your authorized Honda dealer for ecommendations applicable to you individual needs
and use



Filed Under (Honda) by admin on 21-11-2010

motorcycle can be kickstarted with the transmission in gear by disengaging the clutch before operating the kickstarter. Check the engine oil, transmission oil and coolant levels before starting the engine (page 21, 23, 24). Cold Engine Starting: 1. Turn the fuel valve ON. 2. Shift the transmission into neutral. 3. If the temperature is 35°C (95°F) or below, pull the choke knob fully out. 4. If the temperature is below 0°C (32°F), open the throttle two or three times. (The engine requires a richer mixture for starting in cold weather. When the throttle is so opened, the accelerator pump will feed extra fuel to the cylinder, thereby facilitating starting in cold weather.) 5. With the throttle closed, operate the kickstarter starting from the top of the kickstarter stroke, kick through to the bottom with a rapid, continuous motion. (Do not open the throttle, As the carburetor is equipped with an accelerator pump, excessive fuel will be charged into the engine, and the spark plug will be fouled if the throttle is opened and closed repeatedly. Excessive fuel in the engine makes kick- starting difficult.) 6. About a minute after the engine starts, push the choke knob back all the way to fully OFF. If idling is unstable, open the throttle slightly. (1) FUEL FILL CAP (2) BREATHER TUBE WARNING (1) FUEL VALVE (2) CHOKE KNOB Warm Engine Starting: 1. Turn the fuel valve ON. 2. Shift the transmission into neutral. 3. Pull the hot start lever and kick-start the engine. (Do not open the throttle.) 4. As soon as the engine starts, release the hot start lever 1. Shift the transmission into neutral. 2. Pull the hot start lever and kick-start the engine. (Do not open the throttle.) 3. As soon as the engine starts, release the hot start lever. Starting the engine excessively charged with fuel by throttle blipping or other reasons: 1. Shift the transmission into neutral. 2. With the throttle fully opened, repeat kickstarter operation approximately 10 times very slowly to discharge excessive fuel from the engine. 3. Pull the hot start lever and kick-start the engine (Do not open the throttle.) 4. As soon as the engine starts, release the hot start lever. Stopping The Engine 1. Shift the transmission into neutral. 2. Turn the fuel valve OFF. 3. Lightly open the throttle 2 – 3 times, and then close it. 4. Depress and hold the engine stop button until the engine stops completely. NOTE: • Failure to close the fuel valve may cause the carburetor to overflow. (1) THROTTLE GRIP (2) ENGINE STOP BUTTON Break-In Procedure Help assure your CRF’s future reliability and performance by paying extra attention to how you ride during the first operating day or 15 miles (25 km). During this period, avoid full-throttle starts and rapid acceleration. This same procedure should be followed each time when: • Piston is replaced • Rings are replaced • Cylinder is replaced • Crankshaft or crank bearing are replaced



Filed Under (KTM) by admin on 12-11-2010

Carburetor adjustment Basic information about the original carburetor setting The original carburetor setting was adapted for an altitude of approx. 500 meters (1600 ft.) above sea level, and the ambient temperature of approx. 20°C (68°F), mainly for off-road use and central European premium-grade fuel (ROZ 95). Mixing ratio 2-stroke motor oil : super fuel 1:40 . Basic information of changing the carburetor setting Always start out from the original carburetor setting. Essential requirements are a clean air filter system, air-tight exhaust system and an intact carburetor. Experience has shown that adjusting the main jet, the idling jet and the jet needle is sufficient and that changes of other parts of the carburetor will not greatly affect engine performance. RULE OF THUMB: high altitude or high temperatures  choose leaner carburetor adjustment low altitude or low temperatures  choose richer carburetor adjustment * WARNING * -ONLYUSE PREMIUM – GRADE GASOLINE ROZ 95 MIXED WITH HIGH – GRADE TWO – STROKE ENGINE OIL . OTHER TYPES OF GASOLINE CAN CAUSE ENGINE FAILURE , AND USE OF SAME WILL VOID YOUR WARRANTY . -ONLYUSE HIGH – GRADE 2- STROKE ENGINE OIL OF KNOWN BRANDS ( I . E .SHELL ADVANCE RACING X). -NOTENOUGH OIL OR LOW – GRADE OILCAN CAUSE EROSION OF THE PISTON . USING TOO MUCH OIL , THE ENGINE CAN START SMOKING AND FOUL THE SPARKPLUG . -INTHE CASE OFA LEANER ADJUSTMENT OF THE CARBURETOR PROCEED CAUTIOUSLY . ALWAYSREDUCETHEJETSIZEINSTEPSOFONENUMBERTOAVOID OVERHEATING AND PISTON SEIZURE . NOTE: If despite a changed adjustment the engine does not run properly, look for mechanical faults and check the ignition system. Basic information on carburetor wear As a result of engine vibrations, throttle valve, jet needle, and needle jet are subjected to increased wear. This wear may cause carburetor malfunction (e.g., overly rich mixture). Therefore, these parts should be replaced after 1000 hours of using. Idling range – A Operation with closed throttle valve. This range is influenced by the idle adjusting screw 1 . Only make adjustments when the engine is hot. The idling speed can be changed by turning the idle adjusting screw. Turning it clockwise produces a higher idling speed and turning the screw counterclockwise produces a lower idling speed. Opening up – B Engine behavior when the throttle opens. The idle jet and the shape of the throttle valve influences this range. If, despite good idling-speed and part-throttle setting, the engine sputters and smokes when the throttle is fully opened and develops its full power not smoothly but suddenly at high engine speeds, the mixture to the carburetor will be too rich, the fuel level too high or the float needle is leaking. Part-throttle range – C Operation with partly open throttle valve. This range is only influenced by the jet needle (shape and position). The optimum part-throttle setting is controlled by the idling setting in the lower range and by the main jet in the upper range. If the engine runs on a four-stroke cycle or with reduced power when it is accelerated with the throttle partly open, the jet needle must be lowered by one notch. If then the engine pings, especially when accelerating under full power at maximum engine revs, the jet needle should be raised. If these faults should occur at the lower end of the part throttle range at a four-stroke running, make the idling range leaner; if the engine pings, adjust the idling range richer



Filed Under (Honda) by admin on 22-04-2011

ENGINE OIL Engine Oil Level Check Check the engine oil level each day before riding the motorcycle. The level must be maintained between the upper (2) and lower (3) marks on the dipstick (1). 1. Start the engine and let it idle for a few minutes. 2. Stop the engine and hold the motorcycle in an upright position on firm, level ground. 3. After a few minutes, remove the oil filler cap/dipstick, wipe it clean, and reinsert the dipstick without screwing it in. The oil level should be between the upper and lower marks on the dipstick. 4. If required, add the specified oil up to the upper level mark. Do not overfill. 5. Reinstall the oil filler cap/dipstick, check for oil leaks. CAUTION Running the engine with insufficient oil can cause serious engine damage. TYRES Proper air pressure will provide maximum stability, riding comfort and tire life. Check tire pressure frequently and adjust if necessary. NOTE Tire pressure should be checked before you ride while the tyres are cold. Select the right replacement tire in accordance with the following specifications: Cold tire pressures kPa ( kg/cm2, psi ) Front: 175 ( 1.75, 25 ) Rear : 225 ( 2.25, 33 ) Tire size Front: 2.75 – 17 41P Rear : 2.75 – 17 41P Check the tires for cuts, embedded nails, ore other sharp objects. See your authorized Honda Dealer for replacement of damaged tires or punctured inner tubes OPERATION PRE-RIDE INSPECTION WARNING If the Pre-ride Inspection is not performed, serious damage or an accident may result. Inspect your motorcycle very day before you ride it. The items listed here will only take a few minutes to check, and in the long run they can save time, expense and possibly you life. 1. Engine oil level – add engine oil if required. Check for leaks. 2. Fuel level – fill the fuel tank when necessary. Check for leaks. 3. Brakes – check operation. Adjust free play if necessary. 4. Tyres – check condition and pressure. 5. Drive chain – check condition and slack. Adjust and lubricate if necessary. 6. Throttle – check for smooth opening and full closing in all steering positions. 7. Lights – check that headlight, tail/brake light, turn signals, indicators. 8. Engine stop switch – check for proper function. 9. Battery electrolyte – check the level and add if necessary Correct any discrepancy before you ride. Contact your authorized Honda dealer for assistance if you cannot correct the proble

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