Question about 2004 Yamaha WR 450 F 2-trac

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I have and 03 model wr450, after recently purchasing the bike i'm having trouble with all my bulbs, they keep blowing and thats all of them

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Measure the voltage at the bulb socket with the engine at 3000 rpm. it souldn/t be more than 14.5 volts, if more the alternator voltage regulater is defective.

Posted on Jul 28, 2009

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Posted on Jan 02, 2017

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On some models the light switch it defective increasing the volts in the tail and brake circuit.

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Wr450 headlight keeps blowing


Hi, Nathan 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.
http://www.thumpertalk.com/topic/1193575-2007-wr450f-keeps-blowing-headlight-bulbs
headlight buld keeps blowing
Yamaha WR450F Owner Service Manual
OEM parts for Yamaha
YAMAHA WR450F Owner Manual

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I have an 03 HD Electraglide Classic. My headlight (hi-lo) has discoloration on the lens. Is this a standard 7" automotive type lamp, what fits?


No, it is not a standard 7" automotive lamp. The automotive lamp can be used in an emergency but the bulb can't take the beating that a motorcycle puts on it. The bulb for your bike is sort of "heavy duty" so that it can withstand the harsher ride.

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Light bulbs keep blowing out. Purchased in


If the light blows out quickly, there may be a short in the circuit. Check for loose wires or parts of the board touching the chassis or other parts of the TV that may conduct electricity. This may also be due to another faulty part. If this was service before, there may also be a part used that does not have the specs required by your TV.

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1 Answer

Ive just bought wr450 is it normal for bike to get hot if just left running on the stand bike is 2006 model. when you turn off you can hear the fluid in resovoir not the rad. ive been told this is not...


If there is no radiator fan to cool it off , it will sure get heated up if the bike is on a stand.
Its the wind tht blows through the radiator once the bike is in motion tht cools the fluid.

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G'day my 08 wr 450f is blowing oil through the breather hose into the air box. what is causing this???


Im havin the same prod with my bike 08 wr450f
Looks like im gonna have to put it in the shop.

Aug 31, 2009 | 2005 Yamaha WR 450 F

1 Answer

Online pdf manuals for many bikes


i found them recently too Wink sucks noone has offered up a manual for my 03 gsx600f ; \ i have the 02 manual now. but im worried since it doesnt say its for the 03 there will be some differences.

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