TM RACING 2012 TM 100 MX, Руководство пользователя и по обслуживанию, Страница: 63 / 84

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FRAME AND ENGINE MAINTENANCE FRAME AND ENGINE MAINTENANCE
NOTES ON THE CARBURETTOR
The carburetor is calibrated at sea level and at a temperature of 20°
using premium-grade fuel (RON95, unleaded) mixed with 1:30 specific
2T oil.
The only changes that you might need to make are to the main jet, idle
jet and jet needle; changes to other parts of the carburetor are usually
pretty minor.
ATTENTION
High altitude or high temperature conditions require a leaner carbure -
tor setting
Low altitude or low temperature conditions require a richer carburetor
setting
WARNING
- 2-STROKE TM ENGINES REQUIRE A MIXING RATIO OF 1:30 WITH OIL, SO
YOU SHOULD ADD 33 CC (OR ML) OF OIL FOR EACH LITRE OF FUEL. DO
NOT USE FUEL WITH AN OCTANE NUMBER UNDER 95 AS THIS COULD
DAMAGE THE ENGINE.
- USE HIGH QUALITY 2T ENGINE OIL. THE BEL-RAY H1-R IS THE ONLY
ONE TM APPROVES, USES AND RECOMMENDS.
- YOU MUST PUT IN THE CORRECT AMOUNT OF OIL: LESS OR OUT-OF-
DATE OIL COULD CAUSE THE ENGINE TO WEAR OUT QUICKLY AND, IN
EXTREME CASES, RESULT IN IRREPARABLE DAMAGE. AN EXCESSIVE
AMOUNT OF OIL, INSTEAD, CAN CAUSE MORE FUMES THAN NORMAL,
AND FOUL THE SPARK PLUG AND EXHAUST VALVE.
DEFINITION AND USE OF A CARBURETOR FOR A
2-STROKE ENGINE:
- RICH MIXTURE: the amount of fuel is too high in relation to the amount
of air.
- LEAN MIXTURE: there is not enough fuel in relation to the amount
of air.
OPERATION AT IDLING phase 1
The carburetor is running with the throttle valve closed. The mixture is
regulated by the air adjustment screw (1) and idle adjustment screw (2).
You should make the necessary adjustments with the engine hot.
OPERATION WITH THROTTLE VALVE OPENING phase 2
The throttle valve is open; mixture is controlled by the idle jet and shape
of the throttle valve.
OPERATION WITH THROTTLE VALVE PARTIALLY OPEN (PARTIAL
CAPACITY) phase 3
The throttle valve is partially open. In this case the mixture is regulated
simply by the position (notch) and the shape of the jet needle. It is de -
termined at low speed by the idle adjustment screw and at high speed
by the main jet.
OPERATION WITH GAS THROTTLE VALVE FULLY OPEN (MAX
CAPACITY) phase 4
In this case the mixture is regulated simply by the main jet and the jet
needle.
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