Question about 2004 Yamaha YZ 450 F

2 Answers

YZ450 only starts when pushed started, once on header get's RED

I have a YZ450 that did not move for over 6 months no more than a year. I recently put in new spark plug, new battery, oil, coolant, etc...the electric start wont get it running but when i push start it it turns on. Sounds good but after about 10min the header gets really red and hot. How can I fix that???

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 382 Answers

Your carb needs cleaned. Primary circuit or choke circuit are blocked. When you push start your bike and jump on it first reaction is to twist throttle. after it runs for a while the fuel mixture is incorrect and will make it run lean/rich which in turn heats motor up. I would guess rubber seal in choke circuit is stuck. If you clean carb it should solve your problem. Good luck and have a good ride.

Posted on Feb 03, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Yamaha Master
  • 767 Answers

Hi Gabriel,
You have to check your cooling system!
with regards to the starter motor ...does it spin the engine when you hit the button?
Perform a compression test too.
Hope you have used the correct grade of engine oil .


Knight.

Posted on Feb 03, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Cold start


TUNE UP TIME. I-6 engine?
old spark parts JUST HATE water.
100 years, of this and same.
do the 60,000 mile tune up, called the service schedule. lost it?
we have it
cap ,rotor,wires, spark plugs, filters,. fuel and air.
i bet it runs now. (for sure, it has great chances)
id also check engine compression. for 150psi x 6 w.o.t.
mine, loved to crank the Exhaust manifold , and cause the
O2 sensor to go nuts. (but is not related to cold starts)
the cause was a broken exh, clamp, below the bell housing,
making the exh. pipe to wag like dogs tail, bending header and cracking it(mine had nice SST header stock)
that was the only bug in my jeep. I6
other than the monthly ISC sticking and cleaning (IDLE out of control)
i cured it. (ask)

Mar 28, 2014 | 1990 Jeep Wrangler

1 Answer

Back wiper blade doesn't work, wiper motor has been replaced twice!


Try to replace the fuse for it. Was it a GM motor or an aftermarket motor you put in?

Nov 12, 2013 | 2005 Chevrolet Equinox

1 Answer

I have a Kawasaki zephyr 750 after I cleaned carbs the header glows red after I start it and let it run for a few mins. I put hotter pugs in it last year when I had carb trouble could that be it? (All four...


A hotter plug could cause the piston crown to melt (depending on how much hotter) The reason engine makers give a recommended spark plug is because this grade will give the best performance and efficiency. Try reverting to the correct grade.But the headers glowing red is not unusual as not all header pipes are twin wall tubing.

May 17, 2013 | Motorcycles

1 Answer

1997 ford probe has random starting and burns distributor out every 6 months


loose wiring can cause failure i would try a engine harness out of junk yard

Feb 22, 2013 | 1989 Ford Probe

1 Answer

Yz450f overheating


Hi, Anonymous a YZ is a motocross bike designed to run flat out that being said if you are strolling down some scenic trail at a slow pace or letting the bike idle for a few minutes your header pipe will turn cherry red, why you ask? It is not a street bike, it is designed for competition and weight is a major factor all necessary components are of the smallest and lightest design necessary to maintain performance under extreme conditions ie. small radiator and inside frame oil reservoir that doesn't get cooled, the majority of your riding needs to be at high speed. 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.
Yz450 exhaust glowing red after 2 seconds of idling YZ 400 426 450
what would cause the header to glow red
YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha
http://www.yamaha-motor.com/assets/service/manuals/2004/lit-11626-17-11_784.pdf

Sep 27, 2012 | 2004 Yamaha YZ 450 F

3 Answers

I have a Sharper Image Swivel Worldtime Clock model # M1600/M1601 I have lost the instruction manual. I need helpin changing the temp. fromCentigrade to Farenheit and I need to change callender mo.and...


To change the calendar, push the mode button until the calendar section starts flashing. Then press the up or down button to move the calendar month and year first. Once you get to the right month and year, press set, then the date should start flashing. Again, use the up or down button to get to the correct date, then push set. That should get it done.

Regarding the temperature, I used to know how to do that but am now basically clueless. My batteries went out, and when I changed them the temp started up as Celsius and I cannot get it fixed.

Nov 23, 2010 | Watches

1 Answer

I have been trying to turn on my chain saw. Ive pulled the handle back by the trigger gave a few pull on the rope. then i pushed the button in on the side also the push the button back in by the trigger...


The chainbrake should be activated when starting the chain saw. Activate the chain brakeby pushing the front hand guard forwards.b>Cold engine Start position, 1: Set the start/stop switch in the choke position by pulling thered control outward - upward.Decompression valve: Press the valve to reduce the pressure in the cylinder and makestarting easier. Once the machine has started the valve will automaticallyreturn to its original setting.Air purge: Press the air purge diaphragm repeatedly until fuel fills thediaphragm (at least 6 times). The diaphragm need not be completely filled.Grip the front handle with yourleft hand. Hold the chain saw on the ground by placing your right foot throughthe rear handle.Pull the starter handle, 4: Pull the starter handle with your right hand and pull out thestarter cord slowly until you feel a resistance (as the starter pawls engage)then pull firmly and rapidly until the engine fires.Push down the red choke control: As soon as the engine fires which can be heard through a"puff" sound, push down on the red choke control.Pull the starter handle (6): Keep on pulling the cord powerfully until the engine starts.

Nov 18, 2010 | Husqvarna 450 e-series 18" Chain Saw

1 Answer

Jassy 1103, will not start charging the battery.\r...


the 1103 uses an onboard charger. Charger's life span is about 3 years; some fail in 6 months, some in 6 years keep in mind. You can charge the 1103 using an offboard charger which are available for about $50.00 on Ebay. Search for electric wheelchair charger. You want one that has a 4 to 6 amp rating.

The offboard charger has a 3-prong connector on one end and the other plugs into a grounded wall outlet. Plug the charger into an outlet and the three prong connector into the female three prong connector located at the bottom front of the joystick. Give it a good overnight charge and it should be back up to snuff in the morning.

May 21, 2010 | Pride Jazzy 1103 Ultra Standard Power...

1 Answer

Randomly won't start


My 95 legacy just had a problem not moving out of park. I ended up taking the console off and found the little button that is supossed to move when you push on the brake was not moving. With the cover off I can just push it with my finger. There may be a part to replace, I haven't had time to investigate further. I hope this helps. Joe L.

May 18, 2009 | 1995 Subaru Legacy

3 Answers

GE ESS25XGMC WW Side by Side


its possible that your water tank has frozen up, try turning the refrig off and leave the doors open for about 10-15 mins and try it again. if that works just reset temp controls a little lower..

Dec 15, 2007 | GE GSH25JFR Side by Side Refrigerator

Not finding what you are looking for?
2004 Yamaha YZ 450 F Logo

343 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...