KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: Johnnycrash on August 06, 2015, 04:37:41 AM

Title: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 06, 2015, 04:37:41 AM
Hi guys I have a 2003 kx 250 and I noticed the rear calliper is moving up and down quite a lot. The banjo bolt has left a mark in the swing arm so it can't be right. Its attached to the calliper mounting bracket and the mounting bracket is what's moving. I don't see anywhere to mount the bracket to the swing arm to secure it. The axle bolt is the only thing holding it and it's pivoting freely on it and banging around. I'm needing some help in figuring out  how to secure the mounting bracket so it's tight.

Thanks
John
Title: Re: 2003 kx 250 rear brake problem
Post by: umberto on August 06, 2015, 04:41:45 AM
Can you post some pictures of the brake?  Here's a how to using photobucket, which is free.

http://www.kxriders.com/forums/index.php/topic,10040.0.html (http://www.kxriders.com/forums/index.php/topic,10040.0.html)
Title: Re: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 08, 2015, 07:23:32 AM
http://vid288.photobucket.com/albums/ll180/Johnycrash/IMG_1995_zpsecrs7yxe.mp4
Title: Re: 2003 kx 250 rear brake problem
Post by: Foxx4Beaver on August 08, 2015, 07:38:20 AM
from what I could see, it "looks" like the wrong carrier for that swing arm....the carrier should not be anywhere near that sloppy where it slides onto the swing arm, unless it's really worn that much.


did you buy the bike used?
Title: Re: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 08, 2015, 08:34:45 AM
I bought it used. I'm taking it apart now and it's in pretty rough shape. The swing arm key looks worn out. That sucks
Title: Re: 2003 kx 250 rear brake problem
Post by: Foxx4Beaver on August 08, 2015, 08:41:34 AM
eh, you can find used swing-arms on e-bay....only problem, '03 was an "only year" as far as the swing-arm, so it could take a while to find one.
I've also heard of guys cutting off the old "key" on the swing-arm, and having a newer/better key welded on in it's place.
Title: Re: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 08, 2015, 09:06:34 AM
The rear axle nut was loose and the hole for the cotter pin is outside the grooves on the castle nut.
Title: Re: 2003 kx 250 rear brake problem
Post by: Foxx4Beaver on August 08, 2015, 09:28:38 AM
Quote from: Johnnycrash on August 08, 2015, 09:06:34 AM
The rear axle nut was loose and the hole for the cotter pin is outside the grooves on the castle nut.

yeah...if it was ridden like that for a while, that could do it.
Title: Re: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 08, 2015, 09:35:27 AM
I think I need to shim out the swing arm to where the castle nut works. Everything thing is outta wack for the brake with it squeezed in so tight. Looks like I can fit a washer between the caliber bracket and bearing retainer. Worth a shot!
Title: Re: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 08, 2015, 09:39:02 AM
http://i288.photobucket.com/albums/ll180/Johnycrash/image_zpse31kbmlg.jpg
Title: Re: 2003 kx 250 rear brake problem
Post by: Johnnycrash on August 08, 2015, 09:41:02 AM
(http://i288.photobucket.com/albums/ll180/Johnycrash/image_zpszwkr9lsn.jpg) (http://s288.photobucket.com/user/Johnycrash/media/image_zpszwkr9lsn.jpg.html)
Title: Re: 2003 kx 250 rear brake problem
Post by: Actionman on August 11, 2015, 06:47:36 PM
What the hell is a "swingarm key"? Lol
Title: Re: 2003 kx 250 rear brake problem
Post by: Foxx4Beaver on August 11, 2015, 08:17:51 PM
it's another term for the rail, that the carrier slides on to.
Title: Re: 2003 kx 250 rear brake problem
Post by: Actionman on August 12, 2015, 07:56:14 AM
Makes sense.
Title: Re: 2003 kx 250 rear brake problem
Post by: Foxx4Beaver on August 12, 2015, 09:07:57 AM
Quote from: Actionman on August 12, 2015, 07:56:14 AM
Makes sense.

the rail wears out real quickly if you're a mostly mud rider.
Title: Re: 2003 kx 250 rear brake problem
Post by: ecdeyzel on August 13, 2015, 12:27:03 AM
d**n, that sucks man. I hate it when people put the wrong parts on bikes and it clearly doesnt work. :x
Title: Re: 2003 kx 250 rear brake problem
Post by: sandblaster on August 13, 2015, 02:54:17 AM
Quote from: ecdeyzel on August 13, 2015, 12:27:03 AM
d**n, that sucks man. I hate it when people put the wrong parts on bikes and it clearly doesnt work. :x

I see it almost every day...  :-(
Title: Re: 2003 kx 250 rear brake problem
Post by: Foxx4Beaver on August 13, 2015, 07:54:18 AM
Quote from: ecdeyzel on August 13, 2015, 12:27:03 AM
d**n, that sucks man. I hate it when people put the wrong parts on bikes and it clearly doesnt work. :x

both of my bikes are put together entirely with bondo and jb weld 8-)