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1998 yamaha grizzly 600. wont get spark. i got it running and then it just quit. now it wont spark. any ideas

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Yamaha Grizzly 600 leaking gas

if the carb was really cleaned out, then i would suspect the float is not set properly (where #14 in the pic meets #19, assuming it is adjustable), the float (#14) has a hole in it and is no longer "floating" which turns off fuel to the bowl when it raises #19 (needle valve) or the needle valve is not connected properly to the float (common problem when reassembling a carb.

http://partsfinder.onlinemicrofiche.com/atlanticcycleandpower/Yamaha_OEM/YamahaATV.asp?Type=18&A=268&B=11&Action=O

one way to check is to remove the float bowl and with your finger, push the float up (it pivots) and turn on the petcock. if fuel still pours out the needle valve, then the needle valve may not be connected properly to the float or the needle valve is worn. if it doesn't pour out, then i would replace the float as it is no longer floating (one way to also tell is if you see fuel inside the float if its plastic) to turn off fuel or adjust the float tang (assuming the float is brass. if its plastic, then there is no adjustment). good luck.

Posted on Jan 30, 2009

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SOURCE: 1998 yamaha grizzly engine noise

you may have a collapsed lifter

Posted on Jun 21, 2009

  • 10 Answers

SOURCE: my 1991 yamaha fzr 600 wont start

how long did you let it sit for with gas in the carbs, you may have clogged up your jets. after awile gas will break down and turn into varnish, if your bike trys to push the varnish through the system it will clog the jets. try to take off your seat then remove your plastic over the gas tank. remove the gas tank and you will see four bowls *silver ones right next to where the gas tank is on the carbs*. your bowls are in sets of two. there are drain screws on the bowls to remove the gas inside. remove the 16 screws holding the bowl onto the carb. *4 on each* inside you will see your floats and jets. carefully loosen the jets with a screw driver then finish unscrewing them by hand, they are brass and very soft. you should be able to hold up the jets to the light and see a small pin hole. if not get some carb cleaner and give them a squirt and blow them out. do not try to use anything to clean them out, they are very very sensitive and one knick will change the jet. after that i would spray some carb cleaner up the jet holes and try to clean them out also. if you have a compressor it would be wise to use that to blow out the gunk from the jet holes as well. after you run threw all 8 jets put them back together and see how it goes, if nothing you may have to check the jets again and if clogged again your carbs are gunked up and will need to be cleaned

Posted on Aug 12, 2009

  • 1 Answer

SOURCE: I have a 1998 yamaha grizzly 600 with 1110 miles

Had same ended up being the pick up coil which cost me 300 to replace. Runs like a champ -2700 km , supertrapp pipe , jet kit , k-n air filter , mud lite and rims - dream machine !!!!

Posted on Apr 04, 2011

  • 1 Answer

SOURCE: yamaha grizzly 350 won't start

my 2008 700 grizzly has check engine light on and the plug is lean. I changed the battery but it still doesnt chage itself

Posted on Jun 26, 2011

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2000 yamaha grizzly issues when warm


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Yamaha Grizzley 600 1998. starts with pull start and runs well. The electric start turns the engine over, starts periodically, sounds like an intermittent electrical issue, any suggestions? Thx RB


pull the starter and have it bench tested
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I have a 660 Grizzly 03 Atv im having a idle problem i have not did any repairs on this bike the idle will set its self down to low and quit running i set the idle up to normal and in a few moments of...


1. Check the INTAKE valve clearance!!!!
2. Check for an air leak
3. Install a new spark plug and air filter!!
4. Check the compression..
5. Have the carb professionally cleaned and set!!
>> Once you have sone all these steps.. repost to me if this did not fix it!!

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1 Answer

Backfires when you try to rev up engine,


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According to an "ATV Rider" 2009 article, "When the Grizzly was introduced in 1998 as a 600cc machine, the top was blown right off the displacement wars of the time."
It was replaced in 2002 with Yamaha Grizzly 660, an even bigger engine derived from the well-established all-terrain vehicle (ATV) Yamaha Raptor 660R.
Grizzly's 660 cubic centimeter (cc), four-stroke, liquid-cooled single overhead camshaft, five-valve engine performs well in open country, but sometimes it causes serious problems for owners.
Before you call a Grizzly dealer, however, trying a few tricks in your garage can save you a lot of time and money.

Check the fuel level.
Locate the fuel meter indicator on top of the multifunction display.
If it does not work properly, open the fuel tank, and push the Yamaha 660 Grizzly side to side.
Ensure the fuel is not contaminated by water or rust.
If you have not driven your Grizzly 660 for a long time, drain the tank completely, and fill it with a fuel tank cleaner.

Check fuel hoses for cracks or leakage.
The hoses should be soft and simple to bend.
Replace those that show any sign of wear.

Check the compression.
Screw a compression tester into the spark plug hole, and press the electric starter button.
If no compression exists, contact a Yamaha dealer.
Wipe wet or dirty electrodes with a dry cloth.
The spark plug gap should be checked regularly

Correct the spark plug gap.
Measure the gap with a wire thickness gauge.
If necessary, adjust it to 0.8mm using a screwdriver or replace the spark plug.
Use only a Yamaha-specified spark plug.

Check the Yamaha 660 Grizzly's battery.
Operate its electric starter.
If the Grizzly starts quickly, then its battery is in good condition.
If the engine turns slowly, check the battery lead connections, and you may need to change the battery.
If the engine still does not eventually start, your Grizzly is beyond home repair.


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1 Answer

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Check spark clean the carb check valve clearances if none of those you have an electrical problem

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