Question about 2004 Yamaha XT 660 R

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This pertains to an atv ok. i own a 2002 yamaha raptor 660. i am having problems with it and i cannot figure out whats wrong with it.i bought it about two weeks ago from a person who claims hes done a top end rebuild on it. what the problem is when i crank it up on a fresh start. let it warm up. when its warmed up the engine like twitches and dies. i start it back up. it dies. i can hear gurgling in the overflow resevoir.i hear just a little water surging in the upper radiator hose. what have i done. ive put a brand new cooling fan on it. a brand new radiator cap on it. the thermostat i bench tested it twice to see if its working and it is good. the water pump is fine. i filled the radiator and system up fully with 50/50 peak antifreze but after i did that . i started it up and it smoked white out the exhaust and when i went to smell the smoke. i smelt antifreze. so i drained the antifreze all out and put back in nothing but pure water. the smoke stopped. what is the problem with my atv??? when i drive it around in the yard. its fine. but when i park it. it will not stay running.

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  • 3,828 Answers

Unless the head gasket has blown
or rings broken
poor to no idle is not a cooling fault

electrical or fuel tank to carby problem

this pertains to an atv - index-ae5pltgpjye4pp1lzk2q1wt2-3-0.jpg

Posted on Mar 05, 2017


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Posted on Jan 02, 2017

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SOURCE: Yamaha 2001 Raptor 660, need to clean my carb

Drain and replace the gas with fresh.
Remove the air cleaner and spray carb cleaner into the inlet. Work your throttle a little then put everything back together and try to start it.

Posted on Jun 02, 2009

  • 1124 Answers

SOURCE: Yamaha TW 200 starts but won't run.

If the bike has sat for a long period of time without being run - the gas that is sitting in the carb(s) will shellac.. Then the carb(s) would need to be cleaned and "rebuilt"..

Posted on Sep 14, 2009

  • 7 Answers

SOURCE: how to take a yamaha raptor seat cover off

try they have about everything

Posted on Oct 18, 2009

  • 5 Answers

SOURCE: My 04 blaster smokes and idles poorly,dies pushing throttle

stock pump sucks. i run 32:1 in my bike and runs great. take it to a dealer and have them check it out

Posted on Feb 14, 2010

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1 Answer

My son bought a Yamaha 660R Raptor and the wiring is a complete mess through out the entire chassis. I am looking for a wiring diagram to straighten it out.

hey Tom.
get this manual.. OR get a FACTORY service manual from your local dealer.... this will be invaluable later...

Yamaha Raptor 660R ATV Repair Manual 2001 2005

please mark as helpful, thanks...

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Backfires when you try to rev up engine,

check fuel flow and check spark at spark plugs

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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get one of these..If you are going to try the repair yourself....
.this is serious, ....
there MIGHT be damaged components that need to be inspected by a professional.

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Problem with raptor 660

There is a manual available for you freebies: .

And will help with any further work you do on the bike.

Feb 04, 2010 | 2004 Yamaha XT 660 R

1 Answer

I have a 2001 raptor 660, I cant seem to get it to

2 possible issue, your starter solenoid and or your starter relay.

i would not taket the last owner's word for it, even the bike does not agree it is new.

Dec 25, 2009 | 2008 Yamaha XT 660 Z Tenere

2 Answers

Yamaha 2001 Raptor 660, need to clean my carb

Drain and replace the gas with fresh.
Remove the air cleaner and spray carb cleaner into the inlet. Work your throttle a little then put everything back together and try to start it.

Jun 02, 2009 | 2001 Yamaha YZ 426 F

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