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2002 crf450r won't start

Bike will not start. It has compression and i just put a new spark plug in it. Previous owner said bike ran when he put it away. He also said it has been sitting for several months with out being started. What should I do? The carburator may need to be cleaned? How do I go about getting this to run? Help!

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  • Master
  • 2,069 Answers

Start with the carbs. Old gas is a carb killer. Probably the lowest Jets in teh carb bowls are gummed up.

Posted on Dec 07, 2012

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: Won't start

Hi and welcome to FixYa,

Initially, let me run a couple of ideas you may want to try, check, explore or consider based on most bike designs:

  • new battery - does the neutral and/or oil light lit up when key switched to ON;
  • if no, main fuse blown normally 30 Amps, loose battery cable;
  • if yes, is there an audible click when START button press;
  • if no click sound, starter relay faulty;
  • if there is clicking sound, check with voltmeter if +12 is present at big wire going to starter motor while START is pressed;
  • if none, starter relay faulty;
  • if yes, starter motor faulty (stuck up, probably carbon brushes);
  • is Engine RUN switch ON;
  • try with clutch in;
  • exercise side stand;
  • does the bike have an alarm/security/immobilizer.
Pls get back results.

A favor, I would rather that you please do not rate this solution (yet). Due to my current rank and standing, even a Helpful would be detrimental to my rating.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 18, 2008

  • 62 Answers

SOURCE: Won't start

starter is bad or ignition switch

Posted on Dec 20, 2008

  • 3567 Answers

SOURCE: my keeway wont start

Check the fuses. Is the kill switch on or shorting out? Disconnect it and then check for spark. Sidestand/centerstand should be up, Got a good battery?

I am unfamiliar with your Keeway and just trying to help. Don't give me a bad rating if I miss the mark on this one. Thanks.

Posted on Apr 01, 2009

cape cod bob
  • 292 Answers

SOURCE: carbs were removed and cleaned. now starts hard and does not idle

sounds like carbs not cleaned right, oh try changing fuel filter, does fuel pump run constantly. if you cant hear it you can feel it, up behind the ignition. Berrymans B12 fuel additive works wonders. double dose add to gas run bike til hot then let stand overnight, pray a lot and try it again.
here is a free pdf service manual too http://www.carlsalter.com/aaman/Yamaha_VSTAR_650_MAIN_MAN.pdf

http://www.custom-choppers-guide.com/xvs650-bobber-build.html

thats mine

Posted on Apr 04, 2009

indy650
  • 30 Answers

SOURCE: wr25of yamaha spark plug location

The spark plug is in the center of the cylinder head you will have to remove the gas tank to get to it. When you change the plug put a little gas down the hole that should help it start after sitting for so long.

Posted on Jun 18, 2009

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2 Answers

I have a 2002 HD 1200 Custom Sportster and I have lost compression in both cyclinders at the same time. Rode the bike and it ran fine. 2 weeks later I got on the bike and started it up and one cyclind


Changing spark plugs will not affect compression unless you put in the wrong reach plug and it hit and damaged a piston. Sounds more like stuck valves, bent pushrods, broken rockers, or cam drive problems.

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2004 yamaha yz250f ran all weekend then the next day after riding it, it wouldn't start


Hi, Alex and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
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Dirt Rider Magazine
YAMAHA YZ250F Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

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Got spark compression and gas but bike wont start!


Check to see if the ruin burton is on, if so out could be the switch isn't altering the connection to go the plug.

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Most Fords have a fuel reset button. When you ran out of gas you tripped the circuit. Most of the time the button will be on the passenger side by the kick panel. The exact location should be in your owners manual or your local library or auto parts store will have a copy of one for your specific vehicle.

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'95 Jimmy 4.3L won't start unless plug wire is removed


every possibility that the timing ( firing order) is wrong from what you describe
bring the engine to tdc no1 piston on compression and that is no 1 plug lead in the distributor cap

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Older model yamaha ttr 125. has not ran in years. spark plug is fine and put new gas in it. Oil is also fine. Possibly the carb but is there an easy to fix method instead of taking bike to dealership?


If the compression is good and you have a spark at the plug, remove the carburetor and give it a thorough cleaning. Take care not to attempt to clean jets with anything made of steel or you will wind up damaging them and buying new ones. If you don't feel comfortable disassembling the carburetor, remove it and take it to the shop for a rebuild instead of hauling the whole bike; but first ensure that you have compression and spark.

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1 Answer

Was riding bike and was stopped at a red light when it made a loud noise and died, now it won't start. The engine cranks and turns over but won't start.


You didn't say what year and model the bike was but on any four stroke engine, you must have three things for the engine to run. You need fuel, spark, and compression. The easy one to check is the fuel. Take your air filter off and make sure you're getting fuel to the engine. Then, check your spark. Pull the spark plug wires off the spark plugs in the head and insert another set of plugs in the wires. Ground the plugs against the engine, turn the ignition switch on and press the start button. Watch the plugs to see if you have spark. The next test is compression. With the engine cold, remove the spark plugs. If you have a compression gauge, connect it to one of the heads and spin the engine over with the starter. If you don't have a gauge, simply put your finger over the spark plug hole. Turn the throttle wide open and press the start button. You should show about a hundred pounds of compression if you have a gauge or the compression should blow your finger off the hole with a good deal of force if you're checking it that way. If you have all three of these and they're timed correctly, the engine should run. If the engine won't run, find out which of the three elements is missing and work from there.

Good Luck
Steve

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1 Answer

I just got a 1996 kx 125,it looks like the previous owner installed a new piston and rings,the bike dosnt runn,i put new antyfreeze and new mixed gas,i got spark an a new spark plug,i cant get the bike to...


check compression, does the motor spin ez? you should talk with the previous owner and find out what he did. if he did change the piston and ring he should have rebuilt the whole motor. if he did change them why did he!?!
find out and get back to me
Mark Woodring

Jan 22, 2011 | 2003 kawasaki KX 125

1 Answer

Won't start. Everything is reassembled and lookin good..


getting fuel? getting spark to plug? new gas?

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1 Answer

Cylinder issue


Well I figured it out. The carbs were rejetted at some point by a previous owner and the bike was running richer than normal. I recently did a tune up on the bike and put in new OEM spark plugs. The oem plugs were getting fouled. I put the old plugs back in which are a step hotter than oem and the bike ran again. Im just relieved it wasnt anything major. Thanks for the advice.

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