Question about 2001 Suzuki DR-Z 400 SE

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When idleing the lights go good but when you rev bike lights dim

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Follow the leads that exit the crankcase from below carby area and thoroughly check all these connections to CDI unit and Rectifier and Ignition Coil. The wires also then follow thru' engine kill switch and lighting switch, others go to tail and brakelight switch. Are the wires being pinched at head stem or within handlebar switches. If all wiring/swithes and connections are in good order, you have some issues with your stator coils or pick-up coil inside left engine cover and behind the rotor, or the CDI unit. With some luck, the Rectifier or Ignition Coil may be guilty as these are relatively cheap to replace compared to stator coils and CDI. Get an auto. elec. multi meter check done. The Service Manual (info can be asked from Suzi dealer) has the Ohms resistance parameters to test against. Goodluck, and Cheers.

Posted on May 12, 2010

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2 Answers

Lights go dim when rev engine


Hi, Anonymous if your headlight is not working, only one beam works, keeps burning out, blinking, or is dim the first thing you need to check is the headlight bulb for damaged filaments then check your light circuit fuse, then check your head light bulb socket ground wire for a clean tight connection, that being said the usual suspects are:
1. Faulty ground or power supply wire to headlight bulb socket.
2. Worn down solder contacts or loose fit of the bulb base in the socket due to vibration.
3. Worn, chaffed, or broken wires in the light circuit.
4. Corroded, broken, or loose pins/sockets in wire connectors.
5. Faulty hi/lo beam switch.
6. Faulty ignition switch.
7. Fuse is good but no continuity on both sides.
8. Faulty wiring between battery positive and headlight bulb socket.
9. Weak charging alternator/generator.
10. Faulty voltage regulator/rectifier ground or overcharging.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
headlights dim when revved up General Dirt Bike Discussion
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Jan 22, 2014 | Yamaha Motorcycles

1 Answer

89 Yamaha virago 750 while riding lights go dim and engine cuts out unless bike is revved up then engine runs and light come back (sometimes) what's the problem?


You have a charging fault, it sounds like 1 phase of your alternator is down , so giving a low charge rate check in this order.
alternator winding resistance at the plug/ skt into the regulator and,or reg/ rectifier unit
the plugs clean and connections good.
next the out put voltage which should be about 13-14 volts just above idle, lights off, rev engine up to 2-3 thousand revs voltage should be 14.5volts,turn on the lights voltage should not drop to under 13 volts with the engine above 2k rpm.
low charging rates are normally down to alternator and wiring issues not the regulator which if faulty wil give no out put , so no chage at all

Jan 14, 2014 | Motorcycles

1 Answer

Have a 2003 yamaha v star classic 1100. After about 10 miles when stopping at a light the revs go high until the bike comes to a complete stop.After stopping the revs drop to normal.Another thing I noticed...


Hi, Eugene_imric and the usual suspects are:
1. Throttle cables improperly adjusted or pinched.
2. Idle adjusting screw needs to be backed off.
3. Intake system air leak.
4. Fast idle choke ramp is not releasing.
5. Broken throttle return spring.
6. Damaged diaphragm or slide.
7. Faulty MAP, TPS, ATS, O2, VSS sensors or wiring/connector
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
high idle when engine is hot
star 1100 high idle untill complete stop
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2000/LIT-11626-13-36_96.pdf

Sep 17, 2011 | 2003 Yamaha V Star 1100 Classic

1 Answer

After a 2 hour ride out yesterday in daylight,i always turn my lights on to be seen when returned home switched engine off opened garage went to start bike again and completely dead has a data tool duo...


Might have 12.67 volts, but not enough amps to crank engine or light the lights properly. Try putting a charger on the battery, bring it to a full charge. Next, put a load tester on the battery to see if battery is weak or dead cell. If battery checks good, check the charging system. With engine running at idle, put volt meter on battery-read volts, then rev engine to high idle. Volts should climb higher than idle reading.

Apr 18, 2011 | Yamaha YZF Thunder ace 1000 R Motorcycles

1 Answer

When sitting at a light at idle, the headlight goes dim. Then when I rev up and drive normally, the light go up to normal.


The light gets brighter because the higher crank speed is generating more electricity. Your battery is getting weak. Check to see that water covers the top of the plates in each battery cell. A strong battery will make up the difference at idle speeds. Most bike batteries will only last two years or so. Please rate my answer. Thanks.

Sep 04, 2010 | 2008 kawasaki Ninja 250R

1 Answer

How do I adjust the fuel mixture on a 1999 CL1500 CFX? It is running too rich.


Turn the fuel screws in until lightly seated. Back out 2 full turns on each carb. start bike and let it get to operating temp. turn screw out, or in to achieve highest idle for each carb. reset idle to about 1100-1300 rpms. Go back and forth between carbs and setting the idle. Rev bike a couple of good times and see that the idle drops normal with out stalling. Chaz Moto DC

Jan 22, 2010 | Honda Valkyrie Interstate Motorcycles

2 Answers

My battery light comes on dim at idle and turns off when i rev the engine


This is indication of the battery being in good shape and almost fully charged. The light on the dashboard is an indication that your dynamo is producing sufficient current, which increases when you rev up and the vehicle is no longer drawing any charge from the battery. On idling, dynamo produces less current, thus to keep the electrical parts running it draws a small amount of charge from the battery thus lighting the indicator is very dim. Do not worry. Everything is OK with your cars engine & battery...........sodeep

Sep 25, 2009 | 1991 Honda Civic

1 Answer

Headlight is dim in idle.


You need to see what voltage is at your battery at an idle, with a meter first.

Jul 31, 2009 | 1999 Honda VF 750 C Magna

3 Answers

All lights dim, when applying brakes


when the lights dim is the bike idleing or is it above 2000 rpm if its ideling its not producing enough power back to battery so it will dim the lights. rev it up a little and see what happeneds

Jun 06, 2009 | 1985 Honda GL 1200 Interstate Gold Wing

1 Answer

Won't start without charger on battery.


when you charge the battery make sure that its cable is is loosen from the motor coz it can damage your charging system. on your case you have damage it already that's your light dims whenever you rev the rpm up. so change your voltage regulator of your charging system, charge the battery and it is done easy.

Apr 25, 2009 | 2003 Harley Davidson XL 1200 C Sportster...

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