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I have a yamaha yzf 125r 2009 I was riding to work and went to change gear the bike made a strange noise then lost power it will bump but not run while stood still and won't start engine turns over and it selects gears just won't start any help much appreciated

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  • Motorcycles Master
  • 3,799 Answers

Check the battery voltage and if it is below 12 volts put it on charge. Does it start with a jump start pack?

Posted on Nov 28, 2012

  • Paul Barclay Nov 28, 2012

    thanks micheal it won't start like that either it's turning over ok it just won't fire up I've checked plug that's sparking well got fuel coming through got compression just won't kick in

  • Michael Green Nov 28, 2012

    Sometimes a spark plug can become faulty and break down only when under load. But, there are a lot of other possible causes, fuel injecrion computer or the timing may have slipped. (If the sensor has become loose that could explain the strange noise and give the symptoms you describe. Good luck.

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SOURCE: 1997 yamaha yzf 600r electrical problems

a jump box is nothing more then a battery with leads on it so where are you connecting it verses the new battery you put in the bike. that doesn't make since unless you are connecting the box right to the starter motor then it be constently running the motor untill you unhooked it. check all your fuses and examine all wire harnesses for damage, burns, or any mellting.

Posted on Dec 17, 2008

tellme2
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SOURCE: loss of power around 8 -10,000 revs in 3/4 gear

ello m8,,hows things,,clean out the air filter 1st, change all your plugs mr,try that , if nothing u will need to get the carbs balanced to by a bike shop,mechanic,,unless u have carb gauges,,, itl be easier if they do it,, try these 1st m8,, if no joy come back and il go threw step 2 with yuh,,

Posted on Feb 28, 2009

  • 1 Answer

SOURCE: yamaha 2001 r1

Hi There,
Got this from my copy of the Yamaha workshop manual for this model

The YZF-R1 features a self-diagnosing system for the following circuits:
1. throttle position sensor
2. EXUP
3. fuel level indicator light
if any of these circuits are defective their respective condition codes will be displayed on the tachometer when the main switch is set to "ON" (irrespective of whether the engine is running or not)

1. throttle position sensor a) Disconnected b) Short-circuit c) Locked 0 - 3,000rpm
2. EXUP a) Improper connection b) Short-circuit c) Servomotor is locked 0 - 7,000rpm
3. Fuel level indicator light a) Improper connection 0 - 8,000rpm

It looks like you have a problem with the EXUP Valve on yours, probably seized or maybe cables not moving freely
Hope this Helps

Posted on Apr 30, 2009

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SOURCE: while riding all lights started to flash engine run erratic bike died of death bike will not start

Start with charging and load testing the battery. Then test the stator, to test the stator on the bottom of the right down tube is the plug that goes from the stator to the voltage regulator. With a multi meter, read the voltage from the stator, I forget the exact values but as you rev the motor the voltage should climb if it dosn't your stator is bad. If the stator is good take a reading again with the motor running at the battery cables, again I forget the exact value but you should have a steady reading at the battery, if it isn't and fluctuates it is bad.

Posted on May 07, 2009

rockitman187
  • 2559 Answers

SOURCE: I own a 1999HONDA CBR250RR.Sometimes when i try to

Sounds like either the starter is hanging or the starter clutch is.If it was a more serious mechanical problem,It would still happen after starting.



Please rate this a fixya.

Posted on May 18, 2009

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Hi, Anonymous I would love to help you with your engine or chassis noise but I just loaned my brand new pair of listening ears to your local dealer's chief technician so he could take your bike for a test ride and give you his professional opinion and estimate about your noise and repair cost. If you are a little short on "DRACHMA" and a Dealership is not on your list of fun places to visit then perhaps the list below will help soothe your worried mind so you can make an informed decision.
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