Question about 1999 Yamaha YZF 600 R thunder cat

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Yamaha Thundercat rear suspension rebound very very slow after adjustment, know won't alter whatever i try!!! any ideas

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  • Yamaha Master
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Hi, Mick632 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 $10 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.
YZF600R Forums View topic Suspension Adjustments 101
suspension clicker adjustment
How To Setup Motorcycle Suspension PART2 Compression Rebound
Yamaha YZF600 YZF600R 1994 2007 Service Repair Manual PDF Download Manuals...
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Yamaha YZF600RP Owner Manual

Posted on Aug 17, 2016

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Posted on Jan 02, 2017

  • 7 Answers

SOURCE: yamaha yz250 suspension settings

There is too much involved to include everything, but I can describe to you what everything does.

You have compression dampening which slows the rate at which the shock or forks can compress. Then you have rebound dampening which slows the rate at which the shock or forks can extend.

The compression adjuster on the rear shock is toward the top, sticking out sideways where the resivoir mounts to the side of the shock. The rebound adjuster can be seen below the swing arm on the side of the shock.

The compression adjusters on the front forks can be seen from the top. (its the one in the center, the other is an air bleed) The rebound adjuster is in the center of the lower fork leg, and can be seen from below the fork.



The settings are measured in the number of "clicks" from seated. More clicks from seated will be softer, and less clicks from seated will be stiffer. The best thing to do is to see where you are now and adjusting from there. I like to write them down as I go. Turn the adjuster clockwise untill it stops and take note of the number of clicks. DO NOT FORCE IT! You should also check your service manual and take note of the standard setting, and also take note of the maximum number of clicks you can go from seated. You dont want to screw the adjusters out farther than the max, shock damage can result.

You might try changing to the standard settings and try adjusting from there. If the bike doesnt ride at least moderately decent at the standard settings, your shock and/or forks may need a rebuild.


Generally speaking more compression dampening in the rear will result in less bottoming but a harsher ride. Less would result in the oppisite.

More rebound dampening in the rear will result in too slow of extension and packing up which will make the bike swap in the whoops, but it will not tend to buck you or throw you into a nose dive over a jump. Less would result in the oppisite.

In the front, more compression dampening will be about the same situation as described above with the shock.

More rebound dampening in the front forks can tend to take pressure off of the front wheel in corners causing washout, but too little can make the bike want to loop out over jumps.

Posted on Nov 21, 2008

  • 8 Answers

SOURCE: What are the stock suspension settings for a 2003 Honda CR 250 R?

set your compression out 10 or 11 your rebound 9 or 10 and your fork oil height to roughtly 380cc.since its in 03 u should drain the fork oil out, u have to unscrew the top cap of the fork while its in the triple clamps( because its easier this way), loosen then take the fork out of the clamps, unscrew the top caps and pull the fork tube down and turn the fork upside down to drain the oil out then hang the forks up upside down for about 15 minutes then add the new oil right in the fork tube were you'll see a spring, just add the oil in there and you'll be fine and u should replace it with a good medium weight oil

Posted on Feb 04, 2009

  • 200 Answers

SOURCE: The rear shock on my 1999 cr 250 dosn't compress,

That's not a cheap shock to buy but i'm afraid it's blown or bent. Bike is 7 years old..I think it's time for a quality shock like a Fox or comparable..............Good luck to you friend.....Tim

Posted on May 10, 2009

  • 5 Answers

SOURCE: rear suspension a bit spongey

yes U can referr to manual

Posted on Mar 09, 2010

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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

How to harden the forks and rear shock


Both are adjustable. The forks have an adjustment screw. Press down on the front end while standing next to the bike. It should rebound fairly quick but it shouldn't start to go back down again on it's own (oscillates due to not enough damping). Adjust screws evenly on both forks (exact same amount) clockwise and repeat process mentioned until rebound is smooth and doesn't oscillate. The same applies to the rear but you have only one adjustment on the Ohlins reservoir for the monoshock assembly. Do the bounce test and adjust clockwise until the rebound feels firm and doesn't oscilllate. It should handle like a beast and wheelie much easier now.

Nov 21, 2013 | Husqvarna SM 510 R Motorcycles

1 Answer

I want to adjust the suspension on my motorcycle, how do i go about doing this?


Take the bike off its stand onto level ground and stand next to it. While holding your motorcycle upright, put one foot on the foot peg next to you and press hard on it. The front and rear of the bike should squash down and raise at the same rate. If not adjust rear damping compression and rebound to compensate

Now you have a comfortable bike with adequate suspension balance. Now let’s fine tune it a bit. Again there are no tricks to setting up your rear wheel suspension, you have to understand what causes your rear suspension to work. Since rebound occurs after compression we will deal with compression first.

Aug 26, 2010 | Yamaha V Star Silverado Motorcycles

1 Answer

Factory suspension settings


Spring preload FR
To increase the spring preload and
thereby harden the suspension, turn
the adjusting bolt on each fork leg in direction
a. To decrease the spring preload
and thereby soften the
suspension, turn the adjusting bolt on
each fork leg in direction b
NOTE: _
Align the appropriate groove on the adjusting
mechanism with the top of the
front fork cap bolt.
_
CI-10E
Rebound damping force
To increase the rebound damping
force and thereby harden the rebound
damping, turn the adjusting screw on
each fork leg in direction a. To decrease
the rebound damping force and
thereby soften the rebound damping,
turn the adjusting screw on each fork
leg in direction b.
CI-02E
Compression damping force
To increase the compression damping
force and thereby harden the compression
damping, turn the adjusting screw
on each fork leg in direction a. To decrease
the compression damping force
and thereby soften the compression
damping, turn the adjusting screw on
each fork leg in direction b.
CI-02E
1. Current setting
2. Front fork cap bolt
Setting
Minimum (soft) 8
Standard 6
Maximum (hard) 1
1. Rebound damping force adjusting screw
Minimum (soft) 26 clicks in direction b*
Standard 13 clicks in direction b*
Maximum (hard) 1 click in direction b*
* With the adjusting screw fully turned in direction a
1. Compression damping force adjusting screw
Minimum (soft) 20 clicks in direction b*
Standard 13 clicks in direction b*
Maximum (hard) 1 click in direction b*
* With the adjusting screw fully turned in direction a
_
Although the total number of clicks of a
damping force adjusting mechanism
may not exactly match the above specifications
due to small differences in
production, the actual number of clicks
always represents the entire adjusting
range. To obtain a precise adjustment,
it would be advisable to check the number
of clicks of each damping force adjusting
mechanism and to modify the
specifications as necessary
CI-10E
Rebound damping force RR
To increase the rebound damping
force and thereby harden the rebound
damping, turn the adjusting screw in direction
a. To decrease the rebound
damping force and thereby soften the
rebound damping, turn the adjusting
screw in direction b.
CI-14E
Compression damping force
To increase the compression damping
force and thereby harden the compression
damping, turn the adjusting screw
in direction a. To decrease the compression
damping force and thereby
soften the compression damping, turn
the adjusting screw in direction b.
CI-14E
Setting
Minimum (soft) 1
Standard 4
Maximum (hard) 9

Whole process where need to turn toward "a" means clockwise and "b" counterclockwise. From Yamaha service manual. Hope this is good enough info to help you out. Good?

May 03, 2010 | 2002 Yamaha YZF-R1

1 Answer

How does the shock adjusters work? ( the front ones are on the handlebars almost if you follow forks allthe way up..theres a screw with an arrow) Rear is on clutch side of bike in access hole in rear tail...


One adjuster is for compression dampening and the other is for rebound dampening.

These screws adjust the size of an internal port that will allow oil to bypass the valving to adjust the feel of the suspension.

Oct 12, 2009 | 2004 Yamaha YZF 600 R thunder cat

1 Answer

How do i adjust my rear suspension , i want to make it softer and if i make it too soft how do i make it harder again


Looking the service manual on an 04 shows two seperate adjustment screws.  One for adjusting the rebound dampening and the other for adjusting the compression dampening of your rear shock.  The front has the same set up for each side of the fork.  (2 pistons in front and 1 in back).  If you look at the top of the rear shock on the right side of the bike, you should see an adjustment screw.  That is the compression dampening screw.  You should feel a definate click when you turn the screw to let you know how much you have changed it.  Looking toward the bottom of the shock, you should see a screw labeled RBN.  That is the rebound dampening adjustment.  I would adjust the compression dampening first and then the rebound.  Compression takes care of the initial part of the bump while the rebound slows the shock on the return to neutral.  If the rebound is set to high, you will feel like the bike is trying to toss you off the bike like a bull.  If the compression is too high, you will feel like somebody is kicking you in the arse.  
Hope this helped.  You should be able to find that 04 KX 250 service manual at: http://www.repairmanualclub.com/motomanuals/ I know you have an 06, but I'm sure it's very similar.
Good Luck

Jun 10, 2009 | 2006 kawasaki KX 250 F

1 Answer

Suspension setup


front fork setting 6 e.g 6 rings out
damping set to 1/2 turn clockwise without clicking
rear suspension spring preload set to 3 and rebound damping 8 clicks out from fully turned in

Mar 25, 2009 | 1997 Yamaha TRX 850

3 Answers

Yamaha yz250 suspension settings


There is too much involved to include everything, but I can describe to you what everything does.

You have compression dampening which slows the rate at which the shock or forks can compress. Then you have rebound dampening which slows the rate at which the shock or forks can extend.

The compression adjuster on the rear shock is toward the top, sticking out sideways where the resivoir mounts to the side of the shock. The rebound adjuster can be seen below the swing arm on the side of the shock.

The compression adjusters on the front forks can be seen from the top. (its the one in the center, the other is an air bleed) The rebound adjuster is in the center of the lower fork leg, and can be seen from below the fork.



The settings are measured in the number of "clicks" from seated. More clicks from seated will be softer, and less clicks from seated will be stiffer. The best thing to do is to see where you are now and adjusting from there. I like to write them down as I go. Turn the adjuster clockwise untill it stops and take note of the number of clicks. DO NOT FORCE IT! You should also check your service manual and take note of the standard setting, and also take note of the maximum number of clicks you can go from seated. You dont want to screw the adjusters out farther than the max, shock damage can result.

You might try changing to the standard settings and try adjusting from there. If the bike doesnt ride at least moderately decent at the standard settings, your shock and/or forks may need a rebuild.


Generally speaking more compression dampening in the rear will result in less bottoming but a harsher ride. Less would result in the oppisite.

More rebound dampening in the rear will result in too slow of extension and packing up which will make the bike swap in the whoops, but it will not tend to buck you or throw you into a nose dive over a jump. Less would result in the oppisite.

In the front, more compression dampening will be about the same situation as described above with the shock.

More rebound dampening in the front forks can tend to take pressure off of the front wheel in corners causing washout, but too little can make the bike want to loop out over jumps.

Nov 21, 2008 | 2003 Yamaha YZ 250

1 Answer

Adjustng the suspension


adjust your sag but i saw a pro do it with no more than 4 inches. Be sure your wearing all your gear when checking the sag. For rebound if the back of the bike is coming up and hit your butt when your on the breaks before a corner you have to much rear rebound. One good idea is to have a friend film you while you ride to see what the bike is doing. If it packs down to little rebound if it jumps up and down to much rebound. Compression will adjust how fast the shocks move in. If your at a track your suspension should bottom out on the biggest jump which should be about once a lap. Most bikes are set up to wear you don't really need to move the compression or rebound clickers. First thing have to do as I said before is to adjust your sag.

Nov 10, 2008 | 2005 KTM EXC 200

1 Answer

Adjustng the suspension


adjust your sag but i saw a pro do it with no more than 4 inches. Be sure your wearing all your gear when checking the sag. For rebound if the back of the bike is coming up and hit your butt when your on the breaks before a corner you have to much rear rebound. One good idea is to have a friend film you while you ride to see what the bike is doing. If it packs down to little rebound if it jumps up and down to much rebound. Compression will adjust how fast the shocks move in. If your at a track your suspension should bottom out on the biggest jump which should be about once a lap. Most bikes are set up to wear you don't really need to move the compression or rebound clickers. First thing have to do as I said before is to adjust your sag.

Nov 10, 2008 | 2008 HM CRE F250R

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