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Discussion Starter · #1 ·
Hey there,

I have a 02' 300ex. I am experiencing a loud clicking sound in the rear axle.

-The clicking is not consistant.
- When riding I feel a slight frictional pull when the I hear the noise.
- I feel it through the seat. I thought it was the trasnmission at first, but it still does it even when the bike is off and I when I push it.
- Seems more significant when I am turning.
- Definitely two pieces of metal grabbing each other.


Im going to tear the rear off this week sometime and try an figure it out.

Any ideas?

Brake assembly?

Thanks! -Andy
 

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Welcome to the forums... Check you rear sprocket and check the slack in your chain Also jack the quad up with a floor jack under the engine area so the swing arm is free. Grab the wheels and wiggle it around in different motions you may have a bad carrier, also the brake stay bushing on the swing arm may be bad making the caliper jump up and down.
 

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Welcome to the forums. Agree^^^^^^^^^^^.
 

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Discussion Starter · #4 · (Edited)
Thanks for the welcome! glad to be here. The chain is snug. Could the chain being too tight cause this?

I will definintely look at the sprocket when I tear the back end off tomorrow. The rear brake pad is rubbing a littel bit on the disk too. Do you think the pad could be catching the disk?
 

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thats possible jack it up and rotate it the disc is probably warped, a tight chain won't necessarily pop and crackle buy it may snap or break if too tight
 

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Discussion Starter · #6 ·
So I jacked it up and the sprocket is perfect. After rotating the rear axle I pin-pointed the crackling noise (inconsistant ...maybe once every 20 roations) to the area in/around the rear disk break structure.

I rotated the axle, placed my hand on the rear disk break stucture and felt rubbing and vibration. I also just figured out that there is no break fluid in it at the moment. Luckily there is no damage to the disk yet. I am a novice if you have'nt noticed yet... so thank you guys for your patience :) Could the disk break stucture be causing this ruckus?

AB
 

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Jack the rear up and see if you can move the axle side to side or up and down. If the axle does move alot in the carrier then the bearings in the carrier are junk. The 300ex carrier bearing dont last a long time if ya like to play in the water.
 

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Discussion Starter · #8 ·
Ok. I took the breaks off...definitely not the breaks.

The axle DOES move a little bit from side to side. It probally is the bearings... The crackle is localized (i believe) in the carrier. im gonna open it up tonight and see what I find.
 

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Discussion Starter · #10 · (Edited)
Awesome. So I got the axle out and there were free ball bearings rolling around in the carrier...The ball nearings were grinding around in the carrier.

I am going to get a new carrier.

Do you have any reccomendation for aftermarket brands?


Thanks BTW for the manual! got a real one comin in the mail soon but im gonna start reading up!
 

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If your carrier is in good shape you can just replace the bearings. I have only used stock carriers. Dont know much about aftermarket ones.
 

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Discussion Starter · #12 ·

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I'd probably grab a new one. Alot of people seem to like the lone star twin bearing carrier. Depends on what type of riding your doing. I just replaced my bearings few weeks ago, carrier was not nearly as nasty looking as yours. I figure if I start jumping more, etc. I'll go with a twin setup.
 

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Just took mine apart and have the same issue except my carrier is completely hosed. Did you have a hard time putting in the new carrier in the housing? Any tips? I hear it is very difficult. Which one did you go with? Looks like the pricing is around 100 bucks not including the bearing themselves, ouch.

Thanks, and thanks for that dude that posted the 300ex manual, have been looking for that for a while.
 

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We run a LSR carrier in our 300ex. I like it because there is a grease zerk in the carrier to keep it greased. We have had no problems the whole season with the bearings. And we race XC in alot of water and mud. We have 17 2 hr races on the bearings that are in it and they are still like new!
 

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Discussion Starter · #18 ·
Just took mine apart and have the same issue except my carrier is completely hosed. Did you have a hard time putting in the new carrier in the housing? Any tips? I hear it is very difficult. Which one did you go with? Looks like the pricing is around 100 bucks not including the bearing themselves, ouch.

Thanks, and thanks for that dude that posted the 300ex manual, have been looking for that for a while.
I put my new carrier in last week. I got a CNC dual bearing carrier.

It is not a difficult job to replace the carrier. The most annoying part for me was getting the axle lock nut off the axle. You just need a BIG pipe wrench and a lots of torque. The trick for getting the locknut off:

a) the threads are reverse threaded (not a big deal)
b) keep one of the tires on (preferablly the left tire) so you can use it as a lever. You will know what I am talking about when you are trying to unscrew the locknut off the axle.

Also, if your carrier is siezed up like mine was you may have to hammer the old carrier out. I used a block of wood between the hammer and the carrier to drive it out. If the carrier is still stubborn, even with the hammer and the wood, I used a large screw driver to further wedge the carrier holder open and give the carrier a few extra millimeters of space. It should come out relatively easily.

After getting the carrier out, I sanded the inside of the carrier holder of rust residue. Then I regreased it. The new carrier slid right it (thats what she said.)

good luck
 

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Mapp gas and PB blaster will work wonders. Heat the nut for 4-5 min. smack it with a hammer then spray it with the PB blaster. Let it cool for a min. or two and it will start to move
 
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