Question about 2004 Yamaha YZ 450 F

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2004 Yamaha 450F rides rough on front forks.

How do you go about dialing in a front suspension on a Yamaha 2004 450F dirtbike? Mine is riding rough after new seals were installed. What is the proper oil level in the forks after bleading them?

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You can download a manual if you search the web.

Posted on Mar 19, 2009


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Yamaha settings

bottom of forks turn all the way in, then back out 12 clicks
top of fork - trail riding = all the way out then turn in 2 clicks, track riding = turn in 8 clicks
Rear spring needs to be adjusted so the tip of the rear fender drops 2.75" when sitting on it.
The top adjustment (compression valve) will be close to all the way out for trail and 5 to 8 clicks turned in for track.
The bottom adjustment meters how slow or fast the shock extends (rebound). Stand on something at peg height with one foot on the peg and the other on your stand and shove the bike down. Adjust the bottom (rebound) clicker to match the front of the bike so that both return to top at the same time.
This is a good starting point for any bike.
To fine tune your suspension it is always best to have a suspension tech watch you ride and make adjustments until the chassis of the bike stays flat while the suspension does its work. Usually take a tech 20 minutes to set the front and rear compression and rebound track-side!

Jul 05, 2014 | 2003 Yamaha YZ 250 F

1 Answer

My soft tail rides really stiff on rough roads. What can I do to soften the ride. Seems like the front forks are stiff. Just had shocks serviced.

As far as the rear suspension, a softtail won't ride a smooth as one with a swingarm, as the softtail has less travel.

On the front end, Harley has three different "thicknesses" of fork oil, light, medium, and heavy, which gives different suspension dampening.

If the front forks are too stiff, you could try a lighter fork oil.

Feb 14, 2014 | 2007 Harley Davidson FLSTC Heritage...

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I want 2 knw the factory suspension settings for my 06 yamaha yz250

The settings depend on your weight and style of riding (terrain) . Place your settings in the middle , ride , and adjust them from there. Example: If you can adjust the front forks to ten positions (ten clicks) Set both front forks to 5 clicks. Set the rear shock about halfway or on the middle click. Ride the bike carefully over some whoops and jumps and make adjustments by how it rides. The bike will be easier to control when you are close to the right setting for you. My dirt bike rear shock was set to "0" when i got it. Every time I went over a jump the rear shock would try to throw you over the handle bar.

Jan 16, 2011 | Yamaha YZ 250 Motorcycles

1 Answer

How do I add fork oil into my 04 450f and how much ?

Hi, Djjester for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. 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.
How to add fork oil YZ 400 426 450
How to change fork oil on an Dirtbike
YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha

Oct 09, 2010 | 2004 Yamaha YZ 450 F

1 Answer

Fort Adjustment

Hi there,
Check the top of one of the forks, there may be a knob type dial that you can turn clock-wise or anti-clock-wise, turning it one way will give you a stiffer ride, turning it the other will give you a softer ride. Some forks don't have this pre-load adjustment however.

Jul 09, 2010 | Diamondback Response 26 Men's Front...

1 Answer

Does the 1990 use air in the front forks. My son just bought one and he says the front end is riding rough ?

By 1990 the air valve was to let air build up out of forks in most bikes. As for rough riding , change the oil first, 5wt or 2.5wt for softer damping

Jun 01, 2010 | 1989 Yamaha FZR 1000

1 Answer

What type of things to do frequently, to keep my 450 tuned First time owning a dirtbike, its a 03 yz 450f, just need to know the basics to keep my bike in good shape,

The most frequent things to do are to change the engine oil and keep the air filter clean. Adjust the chain and check the spokes for tightness every ride and keep the bike clean.

Every once in a while you will need to check valve clearance and put a fresh spark plug in it.

Other maintenance is required - like changing suspension fluids, changing wheel bearings and seals and you need to keep your suspension linkage and steering stem greased and keep the seals refreshed.

Visit and sign up (free). Lots of very helpful folks there that can help with any specific questions you might have.

Mar 10, 2010 | 2003 Yamaha YZ 450 F

1 Answer

Ride hight and front and back suspension spesifications yzf 450

depends.. set the rear shock to 4 inches of race sag.. the front should be set to the line on the fork

Jul 22, 2009 | 2004 Yamaha YZ 450 F

1 Answer

How much oil do i need to replace into 2007 yzf250 front fork

there is no set amount required. different amounts of oil make different suspension set ups. check with your local dearler and see what will be best suited for yourneeds and body weight. also you need to buy the right weight of fork seal oil to get the right ride.

Jun 15, 2009 | 2004 Yamaha YZ 250 F

1 Answer

Front suspension bottoms out

Add more fluid to the front forks, start with one ounce at a time, thats all it is but dont over fill them or your ride will be too stiff.

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