Question about 2003 Yamaha YZF-R1

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Burning too much gas

Once gas light comes on at 11.5 miles bike shuts off

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I think these have a reserve on the fuel tap
located under the left hand side of your tank

Posted on Apr 14, 2014

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Posted on Jan 02, 2017

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Fuel and oil lights flicker at 3000 rpm and up


Check wiring to console, especially the ground.

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After leaving the last gas stop returning from a 1700 mile ride, the check eng light came on, the volt meter read 8-9 volts. Shut off the passing lights and the volt meter slowly rose to 11-12 volts. Next...


Ok, let's check the charging system. The battery is easy. Take the battery out of the bike and take it to an automotive parts store. Ask them to load test the battery for you. If the battery is over two years old, it could need replacing.

Once you're sure the battery is good and it is FULLY CHARGED, we can test the rest of the system. You'll need a DVOM (digital volt ohm meter) to check the system. With the battery back in the bike, connect the DVOM across the battery. Red meter lead to the positive terminal of the battery, black meter lead to the negative. Put the meter's function selector switch in DC VOLTS, 20 VOLTS or greater. Start the bike and bring it to a high idle. The meter should read 14.5 - 15.0 volts.

Now, to test the stator, follow the wires from your regulator down to where it goes into the engine cases. Disconnect the connector and look into the engine side of it. You'll see two metal contacts down in there. Set you meter's function selector to AC VOLTS, 50 VOLTS or greater. Start the engine and bring it to a high idle. Touch each one of the metal contacts down in the engine side of the connector with a meter probe. It makes not difference since we're measuring AC voltage at this point. The meter should read at least 30 volts.

Now, if the alternator (stator test) does not put out at least thirty volts, the stator is bad and needs to be replaced. If the alternator does check good but not enough voltage at the battery, your regulator may be the culprit. Make sure all connections are clean and tight and that the body of the regulator is grounded good. Recheck the test at the battery. If it still fails, replace the regulator.

Now, I've seen may problems such as your's that are intermittant. In other words, the problem is here on minute and gone the next. I fought that on one bike for over a year until we finally replaced the entire charging system and fixed it. If your bike proves to be doing that, you may wish to consider that option. Fix the thing and be done with it. I wouldn't buy the rotor, just the stator and the regulator.

Good Luck
Steve

Aug 31, 2010 | 2003 Harley Davidson FLHTCUI Electra Glide...

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2002 Honda VTX 1800C. Idle Problem


sound like you just running low on fuel you probably dont have a problem at all don't let you fuel level run so low if it does that turn your fuel petcock to reserve and head for the nearest gas station.

May 03, 2010 | 2004 Honda VTX 1800

1 Answer

Bike shuts off after stopping. no engine check light comes on nor does the FI light come on. 2002 GSXR 1300 4034 original miles


A very young bike to be having problems (Low Miles) did this start after refill at the gas station? If the bike is hesitant and dies when stopping it could be bad fuel, if not is the day temp cold? if so it could have a faulty ATS (Air Temp Sensor). If bad fuel is the issue drain the tank completely and fuel lines, clean the fuel filter on the fuel pump. Refill with clean fuel and it should be OK. If the air temp is cold, check the ATS values with a multimeter. Another thing to check is for any airleaks around the throttle bodies, check all vacuum lines are secure and rubber plugs are in place.

Nov 22, 2009 | 2002 Suzuki GSX 1300 R Hayabusa

1 Answer

Average fuel milage with fuel light on


The light is an indicator of being on "reserve". Some bikes this is anywhere from a quart to a gallon left in the tank. I have two different Harleys and both of them the indicator light comes on at different fuel levels!
To keep from running out of gas I know I get about 190 miles on a tank on the highway (2003 Road King, 103", S&S570G cams, Ported HTCC heads, 10.5 CR) and about 170 miles on combination riding. When you see the light come on look for a gas station! As sson as the light comes on fill up the bike note how much gas it takes, subtract that fron you tank capacity and you will know how much fuel you have left when the light comes on. Take that "fuel left" amount multiply it by you MPG numbers and you will have a guess as to how far you can go on the remianing fuel.

Nov 09, 2009 | 2005 Harley Davidson FLHT - FLHTI Electra...

1 Answer

Bike has sat up for a year or so,wont start,cranks fine,has spark,maybe bad fuel ?


If no fuel stabilizer was added while the bike sat for a year or so.
It is most likely bad fuel with gum deposits.
This can can create some problematic symptoms for you.

It is vital the bad fuel to be cleared from tank/lines and carbs.
You may need the fuel system cleaned as the gum deposits can cause major headaches in the carbs and jets. If the system is not cleaned and even after you get the bike running, you could be miles away and have the fuel fowl jets/injectors, causing shut down.

Check the spark plugs carefully. Oil on the plugs may just need cleaning. Once you get the bike running the oil should burn off if the rings are still in good shape.

Motor needs clean Air, Clean Gas and a hot spark.

Good luck!

Oct 04, 2009 | 1995 Yamaha XV 535 Virago DX

1 Answer

My low fuel light is flashing, What does this mean? It is also very slow to indicate fuel level.


Modern bike have a two stage fuel level indicator. Flashing then solid yellow. Usually you have 5 to 10 miles when you see a flashing yellow light and about 1 mile or less when the light goes solid. Older bike had a shut-off valve and a reserve switch. You turn the switch to reserve once you bike starts to sputter or stall.

If the fuel light stay lit even after you fuel up then the sensor need replacing. That sensor in inside the gas tank.

Aug 11, 2009 | 2004 Yamaha Road Star Silverado

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