??? with brakes that drag a little . - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 9 (permalink) Old 09-01-2011, 11:51 PM Thread Starter
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??? with brakes that drag a little .

i have bled the fluid with a pressure gun , no air bubbles , i have the bike up on stands , i spin the front wheel and it goes around 2 times or so , i here the pads dragging bad , and same with the rear , so i took the calipers off the spin the wheel it goes for ever , , any ideas thinking of cleaning the piston and grease the slides , the pads need to be changed kinda worn down , but could that be it , the piston is out to far and cant go back in far enough ??

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post #2 of 9 (permalink) Old 09-02-2011, 12:30 AM
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Pads can touch slightly when the brakes aren't in use, this is normal - they only retract a tiny amount when the lever's released. If you had too much space between pads & disc, your lever travel would be too much.

If your brakes are binding you'll know, as your bike won't roll well in neutral, say when coasting up to a traffic light. Binding is usually caused by corrosion behind the hydraulic seals.

To service: Remove caliper & pads then take the pistons out (Using a proper tool that grips from the inside, or use compressed air) then gently remove the seals. Use a copper wheel on a dremmel to clean the channels where the seals sit. Inspect seals and replace if damaged. Pistons should be free of corrosion. To re-assemble coat seals with hydraulic silicone grease, or (clean) brake fluid before re-fitting. Copper grease the bolts to avoid them getting seized in place.

Bleeding can be tricky for bike brakes. A Vacuum bleeding kit is usually a useful tool to own.
Avoid re-using fluid that's been bled through the system. Bungee the lever to the handlebar after finishing and leave overnight to get rid of the last few remaining bubbles in the lines. Servicing calipers can help keep them running sweetly. Too many people just push them in when fitting new pads without even cleaning the pistons... Doing this is bad practice as it can affect brake performance.

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post #3 of 9 (permalink) Old 09-02-2011, 12:36 AM Thread Starter
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thanks a lot for your time , and great advice

  • Penske triple adjustable shock Moriwaki linkage
  • forks , valves , springs ,top-out mod
  • Moriwaki rearsets
  • Carbon Airbox heatshielding custom K&N panel filter
  • Power Commander USB
  • Galfer superbike full foating rotors - SS braided lines
  • Brembo 19 RCS Adjustable Ratio Radial Brake Master Cylinder
  • DID 520 gold chain
  • CRG folding clutch lever
  • Relocated battery Shortened wiring harness
  • Flapper PAIR EVAP removed
  • Soft Rev limiter removed
  • 15/41 gears 520
  • Vortex clip-ons
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post #4 of 9 (permalink) Old 09-03-2011, 11:28 AM Thread Starter
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i think my brakes are fine - it was the torque on the axle nuts , had the front 70lbs and needs to be 43lbs , now the rear i had 70lbs but is this right 94lbs seems to much

  • Penske triple adjustable shock Moriwaki linkage
  • forks , valves , springs ,top-out mod
  • Moriwaki rearsets
  • Carbon Airbox heatshielding custom K&N panel filter
  • Power Commander USB
  • Galfer superbike full foating rotors - SS braided lines
  • Brembo 19 RCS Adjustable Ratio Radial Brake Master Cylinder
  • DID 520 gold chain
  • CRG folding clutch lever
  • Relocated battery Shortened wiring harness
  • Flapper PAIR EVAP removed
  • Soft Rev limiter removed
  • 15/41 gears 520
  • Vortex clip-ons
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post #5 of 9 (permalink) Old 09-03-2011, 05:19 PM
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Originally Posted by rc51anthony View Post
i think my brakes are fine - it was the torque on the axle nuts , had the front 70lbs and needs to be 43lbs , now the rear i had 70lbs but is this right 94lbs seems to much
94 ft lbs is what the service manual specifies.
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post #6 of 9 (permalink) Old 09-03-2011, 05:36 PM
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Originally Posted by Defender View Post
94 ft lbs is what the service manual specifies.
The rear axle nut on a my old Hayabusa was only 74 ft/lbs, and it had a lot more power and torque than an RC51.
I think 94 ft/lbs is excessive in my book.
I used to torque it to 74 ft/lbs like my hayabusa with no problems.

The one time I relented and torqued the nut to 94 ft/lbs, I had a problem removing the captive spacers on my marchesini wheels (especially the cush drive).
I felt the increased torque was causing the spacers to deform a bit.
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post #7 of 9 (permalink) Old 09-12-2011, 10:38 PM
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Quote:
Originally Posted by SubSailor View Post
The rear axle nut on a my old Hayabusa was only 74 ft/lbs, and it had a lot more power and torque than an RC51.
I think 94 ft/lbs is excessive in my book.
I used to torque it to 74 ft/lbs like my hayabusa with no problems.

The one time I relented and torqued the nut to 94 ft/lbs, I had a problem removing the captive spacers on my marchesini wheels (especially the cush drive).
I felt the increased torque was causing the spacers to deform a bit.
Quoting figures from other bikes when the manual specifically calls for a set torque amount is nonsense.

Set it to what the manual says 43lbs front, 94lbs rear

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post #8 of 9 (permalink) Old 09-12-2011, 11:20 PM Thread Starter
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UPDATE why they where dragging ,, EBC pads suck there warped from heat the HH pads i hate them half life and there dragging , thats what is wrong ,,,,, so i orderd Vesrah pads i have used them in the past and never had problems , i went cheep with EBC one time and this is what happens , never again ill stick with Vesrah

  • Penske triple adjustable shock Moriwaki linkage
  • forks , valves , springs ,top-out mod
  • Moriwaki rearsets
  • Carbon Airbox heatshielding custom K&N panel filter
  • Power Commander USB
  • Galfer superbike full foating rotors - SS braided lines
  • Brembo 19 RCS Adjustable Ratio Radial Brake Master Cylinder
  • DID 520 gold chain
  • CRG folding clutch lever
  • Relocated battery Shortened wiring harness
  • Flapper PAIR EVAP removed
  • Soft Rev limiter removed
  • 15/41 gears 520
  • Vortex clip-ons
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post #9 of 9 (permalink) Old 09-12-2011, 11:34 PM
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A long time ago (15 years) I used EBC on a Honda NX650... The pad material fell off one of my pads after some use!

Then one day years later believing the hype I thought I'd try their "Green Stuff" performance pads on my RX-7 for a trackday (1 hour). Together with that day they lasted about 1,500km (Less than 1,000 miles). Laughably bad quality products. I'd never use EBC products again.

Haven't had a problem with other brands such as Carbon Lorraine.
EBC is best left on the shelf...

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