Question about 2003 Honda CR 125 R

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Engine revs high when idling - 2003 Honda CR 125 R

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TURN OUT YOUR CHOKE,
CHECK FOR FREEPLAY IN YOUR THROTTLE CABLE
GET A LEAKDOWN TEST DONE

Posted on Apr 16, 2011

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Engin rev up and down what can iet be


check die idle beheerklep it foutiewe kan wees


check the idle control valve .it could be faulty
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1 Answer

Revs high when i change gear


Is it possible the clutch pedal is interfering with the throttle? Start the engine in neutral and allow it to idle. Press only the clutch pedal down and see if this increase the engine speed. If it does speed up the engine and slows back down when you release the clutch then somehow this operation is where your fault lies. If it doesn't alter the idle speed, then rev your engine and release the throttle to see if it returns to idle immediately. If it is slow to return to idle then your throttle cable could be sticking. This means when you change gear lifting off the throttle has little effect and depressing the clutch to change gear causes the engine to race as the throttle is still partially open.

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1 Answer

How correct toro l/mower engine racing


Check the idling setting screw is not holding open the throttle butterfly common fault to fix if the engine races esp when no load is applied the idle throttlexpostion is to high thus the engine runs faster at idle turn the screw located on either the butterflyistelf so less screw threes is against the carb body this should start lowering the idle speed of the engine it should be around the 900 RPM approx for idling and top rev of 3500 at full throttle a rev counter is displaying a extra high rev count the it's the oil governed at fault or malfunctioning or sticking this will cause and engine to race badly to the point of engine destruction eventually
You may need to adjust the movement of the governing leavers etcetera best done by qualified servicing personnel a lawnmower mechanic etc

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1 Answer

Engine revs


sounds like air getting into carb where it shouldn't, i.e. vacuum pipe from carb to tank or between carb and engine

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high revs are usually caused by a vacuum leak, pinch each line one at a time,

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1 Answer

Engine dies upon acceleration after starting and idling


turn the high speed and low speed mixture screws right in[gently]then out 2.5 turns.start it up,screw the idle screw up till it will idle,then adjust low speed mixture screw in or out so you get the highest idle.keep lowering the idle so as you adjust the screw,it wont get it any higher in revs.so by now it should idle.next,open the throttle wide,and adjust the high speed screw until you get maximum revs..then,turn screw 1/4 turn out.that makes it slightly richer,cooling the plug with droplets of petrol.you dont want it lean.if it wont rev fully,check the fuel filter.they get dirty quite often

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