KTM 250 EXC RACING - Manual (Page 20)

ENGLISH
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NOTE:
Dedicated to nothing but offroad racing, 250/450/525
SX/MXC/EXC Racing models make no compromises in their
design. As such, they do not include any radiator fan, and the
size of the radiator is dimensioned for optimum ergonomics.
In normal racing, the cooling system is sufficient.
If you use your motorbike in other conditions, please note that:
–
THE E- STARTER ALLOWS YOU TO START MXC/EXC R ACING MODELS
AGAIN AT ANY TIME . T HEREFORE , TURN OFF THE ENGINE IF YOU
INTEND TO RUN YOUR MOTORCYCLE IN IDLE OR AT A STANDSTILL FOR
LONGER PERIODS OF TIME
( MORE THAN 2 MINUTES ).
– A VOID LETTING THE CLUTCH SLIP FREQUENTLY AND FOR EXTENDED
PERIODS . T HIS WOULD CAUSE THE ENGINE OIL TO HEAT UP , THEREBY
HEATING UP THE COOLING SYSTEM . Y OU SHOULD DRIVE AT LOW
SPEEDS (4- STROKE STYLE - LETTING THE ENGINE PULL YOU ) AND NOT
AT HIGH SPEEDS NOT BY LETTING THE CLUTCH SLIP (2- STROKE STYLE ).
ƽ WARNING ƽ
– A FTER FALLING WITH THE MOTORCYCLE , CHECK ALL FUNCTIONS
THOROUGHLY BEFORE STARTING UP OPERATIONS AGAIN .
– A TWISTED HANDLEBAR MUST ALWAYS BE REPLACED . D O NOT ADJUST
THE HANDLEBAR , IT WILL LOSE STABILITY .
! CAUTION !
– H IGH RPM RATES WHEN THE ENGINE IS COLD HAVE AN ADVERSE
EFFECT ON THE LIFE OF YOUR ENGINE . W E RECOMMEND YOU RUN
THE ENGINE IN A MODERATE RPM RANGE FOR A FEW MILES GIVING IT
A CHANCE TO WARM UP
. A FTER THAT NO FURTHER PRECAUTIONS IN
THIS RESPECT NEED TO BE TAKEN . T HE ENGINE HAS REACHED ITS OPE -
RATING TEMPERATURE AS SOON AS THE RADIATORS BECOME WARM .
– N EVER HAVE THE THROTTLE WIDE OPEN WHEN CHANGING DOWN TO
A LOWER GEAR . T HE ENGINE WILL OVER - REV , DAMAGING THE VALVES .
I N ADDITION , THE REAR WHEEL LOCKS SO THAT THE MOTORCYCLE
CAN EASILY GET OUT OF CONTROL .
– I F ANY ABNORMAL VIBRATIONS OCCUR WHILE DRIVING , CHECK THAT
THE ENGINE FASTENING BOLTS ARE TIGHT .
– I N THE EVENT THAT , WHILE RIDING ON YOUR MOTORCYCLE , YOU
NOTICE ANY UNUSUAL OPERATION - RELATED NOISE , STOP IMMEDIATELY ,
TURN THE ENGINE OFF , AND CONTACT AN AUTHORIZED KTM DEALER .
Braking
Close throttle and apply the hand and foot brakes at the same
time. When driving on sandy, wet or slippery ground use
mainly the rear wheel brake. Always brake with feeling,
blocking wheels can cause you to skid or fall. Also change
down to lower gears depending on your speed.
When driving down hill, use the braking effect of the engine.
Change down one or two gears but do not overspeed the
engine. In this way, you will not need to brake so much and
the brakes will not overheat.
ƽ WARNING ƽ
– I N CASE OF RAIN , AFTER WASHING THE MOTORCYCLE , AFTER RIDES
THROUGH WATER AND IN CASE OF RIDES ON WET OFF - ROAD TRACKS ,
HUMID OR DIRTY BRAKE DISCS CAN DELAY THE BRAKING EFFECT . T HE
BRAKES MUST BE PULLED UNTIL THEY ARE DRY OR CLEAN .
– R IDES ON SALT - STREWED OR DIRTY ROADS CAN ALSO DELAY THE
BRAKING EFFECT . T HE BRAKES MUST BE PULLED UNTIL THEY ARE CLEAN .
– D IRTY BRAKE DISCS CAUSE INCREASED TEAR OF BRAKE PADS AND
BRAKE DISCS .
– W HEN YOU BRAKE , THE BRAKE DISCS , BRAKE PADS , BRAKE CALIPER
AND BRAKE FLUID HEAT UP . T HE HOTTER THESE PARTS GET , THE WEA -
KER THE BREAKING EFFECT . I N EXTREME CASES , THE ENTIRE BRAKING
SYSTEM CAN FAIL .
– I F THE RESISTANCE IN THE HAND BRAKE LEVER OR FOOT BRAKE PEDAL
FEELS “ SPONGY ” ( TOO MUCH PLAY ), THIS IS AN INDICATION THAT
SOMETHING IS WRONG WITH THE BRAKE SYSTEM . D ON ’ T RIDE YOUR
MOTORCYCLE ANYMORE WITHOUT FIRST HAVING THE BRAKE SYSTEM
LOOKED OVER BY A
KTM DEALER .
Stopping and parking
Apply the brakes fully and put the engine into neutral. To turn
off the engine, push the short-circuit button or the emergency-
OFF button with the engine at idling speed until the engine
stops. Turn the fuel tap to the OFF position, park on an area
where the ground is firm, and lock the motorcycle.
ƽ WARNING ƽ
M OTORCYCLE ENGINES PRODUCE A GREAT AMOUNT OF HEAT WHILE
RUNNING . T HE ENGINE , EXHAUST PIPE , MUFFLER , BRAKE ROTORS , AND
SHOCK ABSORBERS CAN BECOME VERY HOT . D O NOT TOUCH ANY OF
THESE PARTS AFTER OPERATING THE MOTORCYCLE , AND TAKE CARE TO
PARK IT WHERE PEDESTRIANS ARE NOT LIKELY TO TOUCH IT AND GET BURNED .
! CAUTION !
– N EVER USE THE HAND DECOMPRESSION LEVER TO TURN OFF THE
ENGINE . U SE THE SHORT - CIRCUIT BUTTON OR THE EMERGENCY - OFF
BUTTON INSTEAD .
– C LOSE THE FUEL TAP WHEN LEAVING YOUR VEHICLE .O THERWISE THE
CARBURETTOR CAN FLOOD AND FUEL WILL ENTER THE ENGINE .
– N EVER PARK YOUR MOTORCYCLE IN PLACES WHERE THERE ARE FIRE
HAZARDS DUE TO DRY GRASS OR OTHER EASILY FLAMMABLE
MATERIALS .
NOTE REGARDING THE SIDE STAND:
Use your foot to kick side stand forward up to the stop and
lean the motorcycle sideways. Make sure that the ground is
solid and that your motorcycle is standing securely. Just in
case, you can shift into first gear.
! CAUTION !
T HE SIDE STAND IS DESIGNED TO BEAR ONLY THE LOAD OF THE
MOTORCYCLE . T HE SIDE STAND AND / OR THE FRAME CAN BE DAMAGED
AND THE MOTORCYCLE CAN FALL OVER IF YOU MOUNT THE MOTOR -
CYCLE , THUS PUTTING AN ADDITIONAL LOAD ON THE SIDE STAND .
Fuel
The racing engine needs premium gasoline with an octane
number of 95 or higher.
! CAUTION !
U SE LEADED OR UNLEADED PREMIUM GRADE GASOLINE (95 OCTANES ).
N EVER USE GASOLINE HAVING LESS THAN 95 OCTANES BECAUSE IT MAY
DAMAGE THE ENGINE .
ƽ WARNING ƽ
G ASOLINE IS HIGHLY FLAMMABLE AND POISONOUS . E XTREME CAUTION
SHOULD BE USED WHEN HANDLING GASOLINE . D O NOT REFUEL THE
MOTORCYCLE NEAR OPEN FLAMES OR BURNING CIGARETTES . A LWAYS
SWITCH OFF THE ENGINE BEFORE REFUELLING . B E CAREFUL NOT TO SPILL
GASOLINE ON THE ENGINE OR EXHAUST PIPE WHILE THE ENGINE IS HOT .
W IPE UP SPILLS PROMPTLY . I F GASOLINE IS SWALLOWED OR SPLASHED IN
THE EYES , SEEK A DOCTOR ’ S ADVICE IMMEDIATELY .
Fuel expands when its temperature rises. Therefore do not fill
the tank to the top (see fig.).
35 mm