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KTM 250/ 300/ 380 SX,MXC,EXC ENGINE REPAIR MANUAL

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

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Repair manual KTM 250 / 300 / 380 Art No 3206004 -E 2-2C main jet jet needle jet needle air control screw idle adjusting screw idle jet throttle valve Idling range A Operation with closed throttle valve. This range is influenced by the position of the air control screw 1 and the idle adjusting screw 2 . Only make adjustments when the engine is hot. To this end, slightly increase the idling speed of the engine by means of the idle adjusting screw. Turning it clockwise produces a higher idling speed and turning the screw counterclockwise produces a lower idling speed. Create a round and stable engine speed using the air control screw (basic position of the air control screw = open by 1.5 turns). Then adjust to the normal idling speed by means of the idle adjusting screw. 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. Full throttle range D Operation with the throttle fully open (flat out). This range is influenced by the main jet and the jet needle. If the porcelain of the new spark plug is found to have a very bright or white coating or if the engine rings, after a short distance of riding flat out, a larger main jet is required. If the porcelain is dark brown or black with soot the main jet must be replaced by a smaller one. mixture too rich: too much fuel in proportion to air mixture too lean: not enough fuel in proportion to air 1 2 OPERATING RANGES OF THE CARBURETOR 2-3C Carburetor adjustment Basic information on 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 MOZ). Mixing ratio 2-stroke motor oil : super fuel 1:40 – 1:60. Basic information on a change of 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:

How To Adjust the Accelerator Pump On the 40mm Mikuni Carburetor

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Filed Under (Yamaha) by admin on 21-01-2012

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1) The “blue” colored screw in the image is the duration adjustment screw. Underneath the head of the screw is a lock nut and the bracket arm that the screw is threaded into. To decrease the amount of fuel squirted the adjustment screw is turned “clockwise” or in. To increase the amount of fuel squirted the adjustment screw is turned “counter clockwise” or out. To get the max, amount of decrease remove the screw and take the lock nut off of the screw. Then replace the screw into the cam arm, then replace the lock nut underneath the arm on the screw. this gives you another 3/32″ of an inch in which the screw can be screwed in.
2) Turn the adjustment screw fully clockwise or IN. Start your engine, Blip your throttle open, if the engine stutters, (hesitates), it is not getting enough fuel so turn the screw counter clockwise to increase the amount of fuel squirted from the accelerator pump into the carburetor. Keep blipping the throttle and adjusting the screw till the carburetor starts to cough. Stop here and turn the screw back in till the coughing stops. Tighten down the lock nut. This should give you the best throttle response with the least amount of coughing and backfiring out the carburetor. Timing Adjustment Screw This is the “Green” colored screw just above the Blue duration adjustment screw. The” Mucker” said it best,,,,, This upper screw adjusts the “timing” of the squirt. By altering it’s setting, you can advance or delay the onset of the fuel squirt. But probably, it won’t have to be touched

Ural carburetors Installation and idle adjustment

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Filed Under (Ural) by admin on 02-11-2010

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1. First you must adjust the idle. It is acceptable per the manual to adjust the idle by using the idle adjust screws (11). This usually involves screwing them then backing out 1 to 1.5 turns. Or you can adjust looking at the sliders 2. If installing the carburetors: a. Remove the cover (2) b. Reomve the slider (3) c. Place the throttle cable through the guide (18) with the spring (4) on the cable. d. Route the cable through the slide catch (6) e. Insert the slide assembly into the chamber and make sure it easily slides up and down. Direct the needle (8) into the opening of the diffuser (angled side visible). f. Screw assembly together and verify via throttle movement that slide moves freely. Attach fuel delivery lines to (12). 3. Using the idle set screw (11) raise the slider so the lower edge is 1-2 mm. 4. Assemble to engine using the proper gaskets (paper – felt – paper). 5. Using the locknut (26) adjust the free play of the throttle cable (2-3 mm) 6. Adjust the idle mixture screw – turn in completely then out 1 to 1.5 turns 1. Remove one of the spark plug caps, and with the cap shorted, adjust (11) to decrease RPM’s to a point of being minimally steady. 2. Adjust the mixture (15) out until RPM’s decrease. Turn in until RPM’s increase slightly. Then turn in screws ¼ to 1/3 revoultion. 3. Do the same for the second carburetor with the first spark plug cap shorted. 4. With both cylinders, adjust each idle (11) on each carburetor the same amount each until it’s at a steady, minimal RPM. Use small changes. (at this point you can use your airflow tool to check). 5. Sharply increase, then decrease throttle. Then engine must return to low RPMs smoothly. If the engine goes below limits, readjust (11) from step 4. Synchronization of the K68 Note: Rather than using the opposite cylinder shorted to test the pull of the live cylinder carburetor, you can use something like a Twinmax connected to the test ports (27 Fig 1). Or, if you have a model without these ports, use a Synchrometer (Appendix 2) held against the face of the carburetor. These tools merely show airflow passing through each carburetor (which is dependent on the position and wear on the slide). If using these tools, it’s not necessary to do the following steps. You wil want to use a throttle guide (Appendix 1), to show airflow at various throttle settings. Using the flow meter of your choice make sure each carburetor is the same at the various throttle settings. 1. Place the motorcycle on the center stand ensuring the rear wheel is suspended 2. Make sure you have large area to work with (safety issues here) 3. Shift into the highest gear with the engine running 4. Short one spark plug cap to the cylinder (using a nail or something in the fins) 5. Increase the speed to 40-50 km/hr 6. Fix the throttle using the throttle (maybe using a throttle stop screw under the throttle housing). 7. Reconnect other cylinder and using the opposite carburetor determine the speed which should be the same as the first. 8. Adjust the position of this slide to achieve the referenced speed using the locknut at the top of the carburetor.

KTM 125 EXC, EXC SIXDAYS 200 XC, XC-W, EXC 250 XC, XC-W, EXC, EXCSIXDAYS 300 XC, XC-W, EXC-E, EXC-ESIXDAYS OWNER’S MANUAL 2008

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Filed Under (KTM) by admin on 02-12-2010

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Chassis number The chassis number is stamped on the right side of the steering head tube. Enter this number in the field on page no 1. Engine number, engine type The engine number and the engine type are stamped into the left side of the engine below the engine sprocket. Enter this number on page 1. Clutch lever The clutch lever [1] is located on the left side of the handlebars. The adjusting screw [A] is used to change the original position of the clutch lever (see maintenance work on chassis and engine). The clutch is hydraulically actuated and adjusts itself automatically. Hand brake lever The hand brake lever [2] is mounted on the handlebars on the right and actuates the front wheel brake. The adjusting screw [B] can be used to change the basic position of the hand brake lever (see maintenance work on chassis and engine). OPERATION INSTRUMENTS » 1 2 A B
ENGLISH 6 OPERATION INSTRUMENTS » TEST All of the display segments briefly light up for the display function test. WS (wheel size) The display changes and the circumference of the front wheel is briefly displayed in millimeters (2205 mm corresponds to a front wheel circumference of 21″ with production tires). Afterwards the display will return to the previous display mode. Electronic speedometer The display in the electronic speedometer is activated as soon as you press a button on the speedometer or an impulse is received from the wheel sensor. The display lights up when the engine is running. The display is cleared if no button is pressed for 1 minute or no impulse is received from the wheel sensor. The button is used to change between display modes. The + and – buttons are used to control various functions. SPEED display mode / H (service hours) Only the SPEED / H and SPEED / ODO display modes are activated in the condition at delivery. SPEED/H is displayed whenever the display is activated and the front wheel is not turning. It automatically changes to the SPEED/ODO display mode as soon as the front wheel starts turning. SPEED displays the speed. H displays the engine’s service hours. The service hour counter starts to count as soon as you start the engine. The displayed figure cannot be changed. Service intervals are indicated in service hours for some KTM offroad motorcycles, making the service hour counter a very practical function. SPEED / ODO display mode (odometer) The SPEED/ODO mode displays the speed and the total distance traveled. The display automatically changes to the SPEED/H display mode when the front wheel stops turning. + button no function – button no function briefly press buttonchanges to the next display mode hold button 3 secs. changes to the next display mode The electronic speedometer has a number of display modes (functions) that you can also activate (reveal) (see: Activating and deactivating display modes).
ENGLISH 7 OPERATION INSTRUMENTS » SPEED / LAP (lap time) display mode You can use the manual stop watch to stop and store up to 10 lap times, which you can view in the LAP/LAP display mode (see below). LAP displays the lap times in hours, minutes and seconds. + button Starts and stops the stop watch, lap time is not reset to 0 – button Stops the stop watch, stores the lap time and restarts the stop watch again. The time is reset to 0. A total of 10 lap times can be stored. If the lap time continues to run after you press the – button, all 10 memory locations are occupied.To clear all of the stored lap times, hold the button for 3 seconds in the SPEED/LAP mode.Up to 10 lap times can be stored in this way. briefly press buttonChanges to the next display mode.If no lap time is stored or the motorcycle is driving, the LAP/LAP mode will be skipped. hold button 3 secs. Clears all LAP figures SPEED / CLK (time) display mode CLK displays the time in hours, minutes and seconds. + button no function – button no function briefly press buttonchanges to the next display mode hold button 3 secs. set the clock menu To set the clock, see „Setting the clock”. Activating and deactivating display modes In the display mode SPEED/H, press and hold the button for 3 seconds to access the SETUP menu. The active functions will be displayed. The blinking function can be activated by pressing the + button and deactivated by pressing the – button. Press and hold the button 3 seconds to store the settings. If no button is pressed for 20 seconds, the setting will be stored automatically and the display will return to the SPEED/H mode. + button activates the blinking display – button deactivates the blinking display briefly press buttonchanges to the next display without changing any settings hold button 3 secs. starts the SETUP stores the settings and changes to the SPEED/H mode

2008 KTM Model Engine Oil Recommendation Chart

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Filed Under (KTM) by admin on 24-11-2010

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2008 Model Type Recommended Engine Oil Type Quantity SPORTMINICYCLES AC 50 SX MINI Motorex ATF Super (Dexron II Gear Oil) 0.15-0.2 L SPORTMINICYCLES LC 50 SX JUNIOR Motorex ATF Super (Dexron II Gear Oil) 0.15-0.2 L 50 SX Motorex ATF Super (Dexron II Gear Oil) 0.15-0.2 L 65 SX Motorex Top Speed 4T 15W50 0.5L SX 2 STROKE 85 SX Motorex Top Speed 4T 15W50 0.5 L 105 SX Motorex Top Speed 4T 15W50 0.5 L 125 SX Motorex Top Speed 4T 15W50 0.7 L 144 SX Motorex Top Speed 4T 15W50 0.7 L 250 SX Motorex Top Speed 4T 15W50 0.7 L SX 4 STROKE 250 SX-F Motorex Power Synt 4T 10W50 1.1 L 450 SX-F Motorex Power Synt 4T 10W50 1.35 L 505 SX-F Motorex Power Synt 4T 10W50 1.35 L CROSS COUNTRY 2 STROKE 65 XC Motorex Top Speed 4T 15W50 0.5L 85 XC Motorex Top Speed 4T 15W50 0.5L 105 XC Motorex Top Speed 4T 15W50 0.5 L 200 XC Motorex Top Speed 4T 15W50 0.7 L
200 XC-W Motorex Top Speed 4T 15W50 0.7 L 250 XC Motorex Top Speed 4T 15W50 0.7 L 250 XC-W (e) Motorex Top Speed 4T 15W50 0.7 L 300 XC Motorex Top Speed 4T 15W50 0.7 L 300 XC-W (e) Motorex Top Speed 4T 15W50 0.7 L CROSS COUNTRY 4 STROKE 250 XC-F Motorex Power Synt 4T 10W50 1.1 L 250 XC-F-W Motorex Power Synt 4T 10W50 1.1 L 450 XC-F Motorex Power Synt 4T 10W50 1.35 L 450 XC-W (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L 505 XC-F Motorex Power Synt 4T 10W50 1.35 L 530 XC-W (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L ENDURO RACING 450 EXC (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L 530 EXC (R) Engine – Motorex Power Synt 4T 10W50 Gearbox – Motorex 4T 10W50 0.7 L 0.9 L SUPERMOTO LC4 690 Supermoto Motorex Power Synt 4T 10W60 Approx. 2.0 L SPORT ATV 450 XC Motorex Power Synt 4T 10W50 2.0 L 525 XC Motorex Power Synt 4T 10W50 2.0 L LC8 950 Super Enduro (R) Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Adventure Orange Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Adventure Black Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Adventure S Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Super Duke Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L 990 Super Duke R Motorex Power Synt 4T SAE 10W50 (for temperatures over 32° F) and 5W40 (for temperatures under 32° F) Approx. 3.0 L

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