I think I broke my dad's KX500's power band!

MBR
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MBR
Edited Date/Time 10/4/2013 1:54am
Today I went for a little ride on my dad's KX500 and noticed that rear fender went all wobbly whenever I gave more throttle. I called to local motorcycle shop and they said that I probably broke the power band! I wonder how much is the new power band or can you fix the old one? It's 1989 KX500 with FMF Fatty pipe and Cycra front number plate.

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JM485
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JM485 10/3/2013 11:02am
10/3/2013 11:02am
Dude, I'm really sorry about your luck. I have heard OEM powerbands are really hard to find and can sell for astronomical prices. It also depends on which color you want, and the tension of the band. Sometimes it is cheaper to buy them individualy for every gear, rather then buy one that will work in all gears. Don't buy the China knockoffs either, they can work erratically and cause a bad crash. Good luck with the repair bro, you are going to need it. (get a service manual)
toomey706
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toomey706 10/3/2013 11:27am
10/3/2013 11:27am
To save money, especially on a 500, you really only need power bands in 2, 3rd and if you're really going Dogger style, 4th gear. You might be able to take them off the other gears. On the 500, the load demand and power available spindles are wound pretty tight so watch your fingers if you do take them off. Laughing
JM485
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JM485 10/3/2013 11:54am
10/3/2013 11:54am
toomey706 wrote:
To save money, especially on a 500, you really only need power bands in 2, 3rd and if you're really going Dogger style, 4th gear. You...
To save money, especially on a 500, you really only need power bands in 2, 3rd and if you're really going Dogger style, 4th gear. You might be able to take them off the other gears. On the 500, the load demand and power available spindles are wound pretty tight so watch your fingers if you do take them off. Laughing
That's a very good point Toomey, safety is critical when dealing with such tightly wound elastic pieces that can become lethal projectiles if not handled properly. 500s are the most dangerous, use extreme caution or consult a powerband expert before attempting such a dangerous repair yourself.
dazzlindino 10/3/2013 11:59am
10/3/2013 11:59am
if the power band is two tite...get a powerband strecherer.....

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MBR
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MBR 10/3/2013 12:43pm
10/3/2013 12:43pm
i'm not sure if this fits KX500, but it sure looks high tech.

TeamGreen
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TeamGreen 10/3/2013 12:44pm
10/3/2013 12:44pm
toomey706 wrote:
To save money, especially on a 500, you really only need power bands in 2, 3rd and if you're really going Dogger style, 4th gear. You...
To save money, especially on a 500, you really only need power bands in 2, 3rd and if you're really going Dogger style, 4th gear. You might be able to take them off the other gears. On the 500, the load demand and power available spindles are wound pretty tight so watch your fingers if you do take them off. Laughing
You forgot to mention the Muffler-Bearing and the KIPS Regulator-Rectifier!
Kryan5
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Kryan5 10/3/2013 1:02pm
10/3/2013 1:02pm
These ones are cheapo's, but its cool cuz they give you a shit ton!


These ones are wwwwaaaaayyyy more expensive, but I heard they were Jeff Wards favorite!
MBR
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MBR 10/3/2013 1:12pm
10/3/2013 1:12pm
disbanded wrote:
Roll it off a cliff
My friend tried that on 250, did not help.
bvm111
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bvm111 10/3/2013 1:56pm
10/3/2013 1:56pm
disbanded wrote:
Roll it off a cliff
MBR wrote:
My friend tried that on 250, did not help.[img]https://p.vitalmx.com/photos/forums/2013/10/03/33349/s1200_KX_2_stroke_broke_in_half.jpg[/img]
My friend tried that on 250, did not help.
holy shit....did he live through that?
motorush
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motorush 10/3/2013 2:01pm
10/3/2013 2:01pm
Not totally sold on being a bad power band. You could have a worn or damaged piston return spring. I know Sphincter Bros.makes a piston return spring out of unaitanium.
JM485
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JM485 10/3/2013 2:36pm
10/3/2013 2:36pm
disbanded wrote:
Roll it off a cliff
MBR wrote:
My friend tried that on 250, did not help.[img]https://p.vitalmx.com/photos/forums/2013/10/03/33349/s1200_KX_2_stroke_broke_in_half.jpg[/img]
My friend tried that on 250, did not help.
bvm111 wrote:
holy shit....did he live through that?
God Damn, never seen that before.
Grizz
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Grizz 10/3/2013 3:05pm
10/3/2013 3:05pm
Have you checked the tire fluid recently? Probably running low. Sorry about your luck though!
HenryA
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HenryA 10/3/2013 3:08pm
10/3/2013 3:08pm
MBR wrote:
My friend tried that on 250, did not help.[img]https://p.vitalmx.com/photos/forums/2013/10/03/33349/s1200_KX_2_stroke_broke_in_half.jpg[/img]
My friend tried that on 250, did not help.
Wtf, isn't that a very odd place for a crack?
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Grizz 10/3/2013 3:11pm
10/3/2013 3:11pm
That's exactly why you shouldn't do AF conversions while under the influence of Jägermeister.
Mxdnusa
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Mxdnusa 10/3/2013 3:18pm
10/3/2013 3:18pm
That thing sounds so good. More pics please!
defeatist45
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defeatist45 10/3/2013 3:21pm
10/3/2013 3:21pm
MBR wrote:
My friend tried that on 250, did not help.[img]https://p.vitalmx.com/photos/forums/2013/10/03/33349/s1200_KX_2_stroke_broke_in_half.jpg[/img]
My friend tried that on 250, did not help.
bvm111 wrote:
holy shit....did he live through that?
JM485 wrote:
God Damn, never seen that before.
I bet I know who has...MPS!!!
RMT
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RMT 10/3/2013 3:32pm
10/3/2013 3:32pm
MBR wrote:
My friend tried that on 250, did not help.[img]https://p.vitalmx.com/photos/forums/2013/10/03/33349/s1200_KX_2_stroke_broke_in_half.jpg[/img]
My friend tried that on 250, did not help.
This also shows why you should not polish the shit out of your aluminum frame!

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wreckitrandy
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wreckitrandy 10/3/2013 7:12pm
10/3/2013 7:12pm
How was it running before it broke? A little lag or bog prior to coming on like the space shuttle? If so, your power valve actuator has some slop in it. If you put a new power band in it you'll have the same problem in no time. The cheapest fix is to go old school and take all the junk out of it. No power valves, power bands or, reed valves and you've got a fire breathing, piston port, plug whiskering brute of a bike that anyone born before 1965 would be proud to own. Keep us updated please.
mynewcr250
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mynewcr250 10/3/2013 7:24pm
10/3/2013 7:24pm
HAHA, what happened? the cradle welds broke and then the frame?
MBR
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MBR 10/3/2013 10:30pm
10/3/2013 10:30pm
The "Roll it off a cliff" advice sounded so easy and cheap fix, we decided to try it again with my friends CR500 (because I was thinking that this advice works only with 500 cc bikes). I was right, it actually helped and the power band of my friends CR500 is now ok, but the rest of the bike is not.
MBR
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MBR 10/3/2013 10:37pm
10/3/2013 10:37pm
Here is picture of my dad's bike to help locate the broken power band.
MotoGuido
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MotoGuido 10/3/2013 11:47pm
10/3/2013 11:47pm Edited Date/Time 10/3/2013 11:50pm
If you ever are in a pinch out on the trail you can use a Trojan condom, preferably magnum, in place of a powerband to limp the bike home. Had to dip into my stash once when I crashed in the middle of the desert, at night, leading the Baja 1000 a few years back to get to my next check point where factory honda installed another one of their HRC kevlar reinforced one's for me.
superorbital
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superorbital 10/4/2013 1:54am
10/4/2013 1:54am
MBR wrote:
My friend tried that on 250, did not help.[img]https://p.vitalmx.com/photos/forums/2013/10/03/33349/s1200_KX_2_stroke_broke_in_half.jpg[/img]
My friend tried that on 250, did not help.
RMT wrote:
This also shows why you should not polish the shit out of your aluminum frame!
I like the swingarm sticker that says OZWeld maybe? Time to take it back to Ozweld and have them weld it again.

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