Question about Yamaha 2005 Grizzly 80

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Show timing marks for 2007 yamaha grizzly 80

Show timing marks on case

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New carb idles good but will not throttle up with out choke misses and backfire 07 grizzly 450


either the float height is wrong, the main jet needle needs lifted or there's an air leak somewhere.

Mar 26, 2017 | Yamaha 2007 Grizzly 450 Auto 4x4

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How to know signs of a bad fuel pump in 2009 yamaha grizzly 350


Disconnect the fuel line at the fuel filter or carby, without starting the engine, turn the key to the on position. The pump should start , now watch to see if you have an even flow from the hose, if it looks like spluttering you may have a problem, also check the fuel filter.

Jul 30, 2014 | Yamaha 2007 Grizzly 350 Automatic

1 Answer

New Fan not coming on 2007 Yamaha Grizzly 450 Auto 4by4


make sure all your connections are hooked. and that no wires are damaged

Oct 05, 2013 | Yamaha 2007 Grizzly 450 Auto 4x4

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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.


Jul 23, 2013 | Yamaha 2005 Grizzly 660 Auto 4x4

1 Answer

Yamaha grizzly 450


Time for a battery the same thing happened to mine about the same time

May 24, 2013 | Yamaha 2007 Grizzly 450 Auto 4x4

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