gilberjj
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posted January 14, 2010 04:23 PM
 Edited By: gilberjj on 15 Jan 2010 00:23
rear brake removal
I've heard of this, but I'm going to do this to my drag bike. I don't have any need for a rear brake. I guess the only thing keeping it on was the thought of it as a backup braking system in case the front fails, but I wouldn't want to even try using just the rear slowing from 150mph! I bought a rear caliper and bracket for $32 shipped off ebay. I'll dremel the bracket so it's pretty much a $32 spacer, and then sell the caliper. Hopefully I can get $20ish for the caliper. Oh well if I can't.
I'll try and get the total weight of the entire rear brake system, but I don't have a good scale...... I bet it will be 2 pounds or better.
reservoir
foot brake
line
hydraulic fluid
bracket
caliper
brake disc
I'll document this one once I get the part........
  
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Shane661
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posted January 14, 2010 04:24 PM
Edited By: Shane661 on 15 Jan 2010 00:24
The rotor itself is more than 2 pounds! 
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gilberjj
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posted January 14, 2010 04:25 PM
Edited By: gilberjj on 15 Jan 2010 00:25
quote:
The rotor itself is more than 2 pounds!
cool!
edit: Plus it's sprung weight (I always get sprung and unsprung confused........ it sprung if it's on the wheel......... right?)
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smokinZX14
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posted January 14, 2010 04:30 PM
Don't take off the rear brake !!!!!!!! Really you do need it and some tracks will NOT let you run without one ..
____________
Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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gilberjj
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posted January 14, 2010 04:32 PM
quote:
Don't take off the rear brake !!!!!!!! Really you do need it and some tracks will NOT let you run without one ..
really........ I guess I'll have to look into it more. I don't think I've ever used my rear brake at the track.
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Shane661
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posted January 14, 2010 04:33 PM
Are you running a single front?
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eklipse636
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ZX-14
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posted January 14, 2010 04:34 PM
quote:
Don't take off the rear brake !!!!!!!! Really you do need it and some tracks will NOT let you run without one ..
+1! I always slightly use my rear, it won't completely slow the bike down, but it helps.
Our track at test and tune will le you un, but any events that have tech you don't stand a chance.
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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gilberjj
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posted January 14, 2010 04:39 PM
quote:
Are you running a single front?
Both fronts
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KZScott
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posted January 14, 2010 04:48 PM
drill the holes bigger in your rotor and call it a day. i did 1/2 in in mine (3/8 up front)
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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gilberjj
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posted January 14, 2010 04:49 PM
quote:
drill the holes bigger in your rotor and call it a day. i did 1/2 in in mine (3/8 up front)
hmmmmmmmm.......
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KZScott
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Posts: 7235
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posted January 14, 2010 04:59 PM
easy, free. did mine in a drill press and chamfered the holes with a bigger bit
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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Wheelie
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Old Man
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posted January 14, 2010 05:09 PM
take the brake off and run it half the day, then install it and see if it slows you down
wee
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Shane661
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posted January 14, 2010 05:16 PM
Edited By: Shane661 on 15 Jan 2010 01:49
quote:
take the brake off and run it half the day, then install it and see if it slows you down
wee
After you do that, jump off a tall building. Perhaps the laws of physics do not apply any longer on this planet, and you won't fall to your death. Otherwise, yes, lightening your bike will make it accelerate more quickly. 
But, on a serious note, it's more common to ditch a front brake and keep the rear brake intact.
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masszx14
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posted January 14, 2010 05:45 PM
You could have measured the width of the caliper hanger and
gotten a spacer machined, much easier than cutting it IMHO.
____________
universal@mind
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gilberjj
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posted January 14, 2010 06:38 PM
quote:
You could have measured the width of the caliper hanger and
gotten a spacer machined, much easier than cutting it IMHO.
i bet that would be more money
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SteveWFL
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posted January 14, 2010 09:10 PM
Edited By: SteveWFL on 15 Jan 2010 05:13
remove all the brakes, parachute and then shuffle your feet like old man flintstone
____________
2010 Concours14
'08 R1 YAMAHA
ZX14 gone!
CBR600RR track bike
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masszx14
Pro
A mind beside itself!
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posted January 15, 2010 02:55 AM
quote:
quote:
You could have measured the width of the caliper hanger and
gotten a spacer machined, much easier than cutting it IMHO.
i bet that would be more money
Maybe a machine shop would have charged you 1/2 hour labor at the most,
but the spacer would also be lighter than the cut oem hanger unless you trim it way down.
Last time I needed spacers machined for the gsxr, I got 2 engine mounting bolt spacers and 4 front brake caliper
spacers for $50. The engine mounting bolt spacers were copied from oem after one got crushed by the frame slider
when I highside. The front caliper spacers allowed for larger brake rotors and the fitting of R1 brake calipers.
My point is- all 6 spacers were more difficult to machine with different o.d. on the same piece. A rear axle spacer that has
the width of the brake hanger would be a piece of cake to make and it will take 5-10 min.
____________
universal@mind
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gilberjj
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posted January 15, 2010 12:57 PM
quote:
quote:
quote:
You could have measured the width of the caliper hanger and
gotten a spacer machined, much easier than cutting it IMHO.
i bet that would be more money
Maybe a machine shop would have charged you 1/2 hour labor at the most,
but the spacer would also be lighter than the cut oem hanger unless you trim it way down.
Last time I needed spacers machined for the gsxr, I got 2 engine mounting bolt spacers and 4 front brake caliper
spacers for $50. The engine mounting bolt spacers were copied from oem after one got crushed by the frame slider
when I highside. The front caliper spacers allowed for larger brake rotors and the fitting of R1 brake calipers.
My point is- all 6 spacers were more difficult to machine with different o.d. on the same piece. A rear axle spacer that has
the width of the brake hanger would be a piece of cake to make and it will take 5-10 min.
Sounds like you have a great machine shop! My local machine shop charged me $20 to cut some aluminum (MY ALUMINUM THAT I BROUGHT IN). I haven't used them since. I can easily get $15 from the caliper that came with the bracket. So I look at it as a $17 bracket, plus I KNOW it will work perfectly.
That being said, you guys are making me second guess even removing the rear brake......
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KZScott
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posted January 15, 2010 02:01 PM
quote:
That being said, you guys are making me second guess even removing the rear brake......
i heard your motor will blow up if you take off the rear brake
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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gilberjj
Needs a job
Friend of Fast
Posts: 3196
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posted January 15, 2010 02:08 PM
quote:
quote:
That being said, you guys are making me second guess even removing the rear brake......
i heard your motor will blow up if you take off the rear brake
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eklipse636
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ZX-14
Posts: 6046
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posted January 15, 2010 04:39 PM
I wouldn't run it without the rear. That's just my $.02... I just took one front rotor off but I haven't got a chance to ride it on the street. I'm not convinced of it yet.
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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KZScott
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posted January 15, 2010 06:22 PM
I was reffered to this site for rotor lightening instead of DME. I have gotten a reply about doing some zx12r stuff. I may be getting another set of rotors and sending them down. I will post results if i do. waiting on hearing back now as i just replied to the email.
http://www.qualitymachineco.com/productsales.html
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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gilberjj
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Posts: 3196
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posted March 17, 2010 04:25 PM
so...... I was looking but couldn't find anything. Are there any rules that require bikes to have rear brakes?
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jdrill04
Expert Class
Posts: 238
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posted March 18, 2010 12:40 AM
I ran my bike without a rear brake all of last year. I pretty much just grudge race the bike so no rules. It is true about alot of tracks not letting you run in any of the classes without a rear brake. It will save you about 7 lbs. with it all removed. You can also have a spacer made for about 10 bucks at about most machine shops.
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Shane661
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posted March 18, 2010 04:02 AM
My track won't allow it...
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