KX Riders

Maintenance & Technical => KX500 Original => Topic started by: sandblaster on June 14, 2016, 12:42:56 PM

Title: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 14, 2016, 12:42:56 PM: http://www.oem-cycle.com/forum/viewtopic.php?f=5&t=1152 (http://www.oem-cycle.com/forum/viewtopic.php?f=5&t=1152)

(http://www.oem-cycle.com/forum/download/file.php?id=4212)

Things are taking place nicely...
Title: Re: Need some better stopping power for your rear wheel?
Post by: KXDINO on June 15, 2016, 12:30:58 AM: i saw in a mag somewhere on a k5 that had the 450 back wheel and disc and caliper , would be more costly may be , but he said it worked great , i dont know all the details about the axle and bearings they used etc , i most likely do it when my stock parts are buggered, i did fit my kx250 06 2t with the 450 caliper and hose to stop the banjo bolt from digging in to the swingarm as when things get worn it digs in to the swingarm , on the 450 it sit towards the top and front a bit more.plus it a tad lighter for less unsprung weight not that i noticed it.
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 15, 2016, 02:59:39 AM: Yes, I think the dual piston caliper may be a bit over overkill but it won't cost much to find out how well it works.
So far I have 55 bucks in it :-D
Not to mention I am selling the other caliper that came with it and the two caliper mounts..
If they sell I could actually make money on the deal so why not :-D
I think it may be ideal for street use but we will see...
If nothing else I can always do another and use the 450 rear caliper the next time..
Stay tuned...
Title: Re: Need some better stopping power for your rear wheel?
Post by: DoldGuy on June 15, 2016, 04:30:53 AM: Curious....would the caliper align if using a KX500 wheel/rotor?

DoldGuy
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 15, 2016, 01:30:52 PM: Yes it would align providing you welded it up where it's natural position was.
I may end up doing exactly that after I check and see what the benefits if any using the dual piston set up.
Almost ready for a trial run.

(http://www.oem-cycle.com/forum/download/file.php?id=4222)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 22, 2016, 11:00:47 AM: So here is what we ended up with so far.
KX450F rear wheel
KX450F to KX500 rear axle adapters from Warp 9.
A used 94 CRB600 f2 Right front brake caliper.
KX500 01 rear brake caliper mount.
KX500 93 rear brake hose.
Nothing has been rebuilt.
All I did was disassemble the caliper, clean it, and reassemble it.
Modded the mount to make correct clearance and removed some unnecessary material, then bled and adjusted it.
That's it.
To do this right I should completely rebuild the master cylinder, the caliper, installed new pads (I used the pads that came on the used caliper), installed a new SS brake line, and installed a new rotor.

However, even with all this old used junk the performance is remarkably better..

But how much of the increased braking is from the larger rotor diameter and how much is from the dual piston caliper?
We will have to test it and find out...

I believe this is the final version for the CBR600 caliper..

(http://www.oem-cycle.com/forum/download/file.php?id=4225)

(http://www.oem-cycle.com/forum/download/file.php?id=4226)
Title: Re: Need some better stopping power for your rear wheel?
Post by: umberto on June 22, 2016, 11:10:08 AM: Very nice work! Is it intended for SUMO or dirt work?
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 22, 2016, 12:54:34 PM: Well the request was made by a Pro MX race dude....
He will be testing it when I'm done.
So for him it would be for the dirt.
For me, Supermoto and sand :-)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 22, 2016, 12:55:55 PM: What is really cool about this mod is anyone can do it with a Sawsall and a bench grinder.
Of course you gotta know someone who can weld aluminum :-o
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 22, 2016, 04:03:02 PM: Ok, the sun went down... Here is a better pic

(http://www.oem-cycle.com/forum/download/file.php?id=4227)
Title: Re: Need some better stopping power for your rear wheel?
Post by: DoldGuy on June 23, 2016, 03:23:03 AM: I like the photo bomber. :-D
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on June 23, 2016, 07:35:57 AM: :lol:
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 07, 2016, 11:35:48 AM: Ok, all the parts are here for rebuilding the rear caliper as well as the SS hose.

(http://www.oem-cycle.com/forum/download/file.php?id=4246)

Please ignore the polished KX500 Wossner rod in the background 8-)

(http://www.oem-cycle.com/forum/download/file.php?id=4247)

So I pulled the caliper off my bike and completely disassembled it... Then cleaned it up really nice... Not that it wasn't clean before... But we are trying for a new level :-D

(http://www.oem-cycle.com/forum/download/file.php?id=4248)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 14, 2016, 02:46:16 PM: Everything is ready for the final test.... Just waiting on the weather :-(

(http://www.oem-cycle.com/forum/download/file.php?id=4249)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 14, 2016, 02:46:29 PM: Ok... here is where we are at on the rear brake mod. Yes, it works... But nothing special so I don't recommend doing it as it currently is. However, I have a more powerful rear brake master cylinder I'm working on so all is not lost. Plus.... I'm working on another direction and will post pics as I make some progress...
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 14, 2016, 02:47:20 PM: Hmmmm.... This lever is about 1/2" longer then the KX500 lever...

(http://www.oem-cycle.com/forum/download/file.php?id=4312)

And it looks like all I need is a bushing for the pivot point...

(http://www.oem-cycle.com/forum/download/file.php?id=4311)

Hmmmmm.... :-o
Title: Re: Need some better stopping power for your rear wheel?
Post by: Schlenks on July 24, 2016, 05:12:48 PM: I saw that you have a KX450 wheel on the 500, what did it take to make that work? Or was it a direct replacement? What year was it from and what year is your 500? Thanks!
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 25, 2016, 02:34:43 AM: Quote from: Schlenks on July 24, 2016, 05:12:48 PM
I saw that you have a KX450 wheel on the 500, what did it take to make that work?

It requires 2 kx450 to kx500 rear wheel adapters made by Warp 9 Racing.

Quote from: Schlenks on July 24, 2016, 05:12:48 PM
Or was it a direct replacement?

Nope. The kx500 uses a 20mm rear axle and the 450 uses a 25mm rear axle.
You need these from Warp 9 Racing

(http://www.oem-cycle.com/forum/download/file.php?id=1744)

Quote from: Schlenks on July 24, 2016, 05:12:48 PM
What year was it from and what year is your 500?

Between a 89 and 03, I have a hodge podge of different year parts on mt bike.
I even have some 98 kx250 and 06-15 KX450f parts on it :lol:
But what you really want to know is what year rear wheels....
KX500 88-04
KX450F 06-15

Quote from: Schlenks on July 24, 2016, 05:12:48 PM
Thanks!

Your welcome.
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 25, 2016, 02:37:21 AM: UPDATE....
I'm waiting for all my parts to come in for the next phase of this project.
Title: Re: Need some better stopping power for your rear wheel?
Post by: Schlenks on July 25, 2016, 02:59:56 AM: I've been looking for some spare wheels here and there. What makes the wheels comparable? I found some YZ rims and the rear has the same 20mm axle, different sprocket/disc bolt patterns, same disc OD, the only difference is the KX is 130mm from bearing to bearing and the YZ is 131mm. Think they'd be compatible? Or am I better off looking into the warp 9 adapters?
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on July 25, 2016, 07:34:49 AM: You can switch several X brand 20mm rear wheels with the kx by simply changing the spacers.
If it were me though I would just get the adapters and call it good.
Cheap and easy..
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 02, 2016, 03:21:03 AM: Back to the rear brake lever...

(http://www.oem-cycle.com/forum/download/file.php?id=4349)

(http://www.oem-cycle.com/forum/download/file.php?id=4350)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 02, 2016, 03:21:33 AM: (http://www.oem-cycle.com/forum/download/file.php?id=4353)

(http://www.oem-cycle.com/forum/download/file.php?id=4354)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 02, 2016, 03:22:12 AM: (http://www.oem-cycle.com/forum/download/file.php?id=4355)

(http://www.oem-cycle.com/forum/download/file.php?id=4356)

Here is a short vid of the new lever in action.

https://www.youtube.com/watch?v=fXaZvBcvMwI&feature=youtu.be (https://www.youtube.com/watch?v=fXaZvBcvMwI&feature=youtu.be)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 03, 2016, 06:15:44 PM: (http://www.oem-cycle.com/forum/download/file.php?id=4365)
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 03, 2016, 06:16:32 PM: Now that the concept is proven... It's on to the rear brake caliper mount...
I wonder where my new swing arm is at :-o :lol:
Title: Re: Need some better stopping power for your rear wheel?
Post by: 436m on August 17, 2016, 12:13:12 AM: info on the aftermarket pedal? direct replacement for a 2000 K5? My stocker is all jacked up. TIA
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 17, 2016, 02:42:04 AM: There aren't any as far as I know.
So, buy a KX250f rear brake pedal (Any year through 2015), Press some 12mm ID x 16mm OD x 10mm long Oil Impregnated Bronze bushings in it, Ream the ID back to 12mm (They have a tendency to tighten up after pressing) and go ride it...
Title: Re: Need some better stopping power for your rear wheel?
Post by: conbread on August 23, 2016, 12:18:58 PM: on my kx500 i used a 2005-2012 yz250 master cylinder and it fit perfect and made the brakes work great..
Title: Re: Need some better stopping power for your rear wheel?
Post by: sandblaster on August 23, 2016, 02:42:17 PM: Yep... That's half the battle :-)