| Author | Message | ||
     S2forever |
Did someone try to suppress front brake pad rattle on your S2 with PM calipers? While bike at rest or passing bump at low speed I hear the annoying noise that sounds like it is going to fall apart sometime soon. It makes me feel the whole bike cheep. Any idea? (Message edited by s2forever on October 20, 2014) | ||
| Buellistic |
Get a new rotor from Al at www.AmericanSportBike.com , problem solved ... | ||
| S2forever |
I am talking about the noise from brake pads rattling inside calipers. I have confirmed it is from pads by temporarily inserting spring over pins that run through caliper body and 2 brake pads. Long time ago I contacted Performance machine to ask if there are anti-rattle spring available for that specific model. Response was no. | ||
| Buellistic |
Go to NAPA and get yourself some CRC Disc Brake Quiet ... Put a little on the PADS where the caliper pistons contact the pads ... Put things back together spin the wheel in the direction it rolls and activate the break lever three times, let the application dry ... This not only stops pad rattle, "BUT" the pads are held to the caliper pistons and will pull back with the caliper pistons causing less pad drag ... Same applies to rear brakes !!! | ||
| S2forever |
Interesting product. Sounds like worth trying. | ||
| Buellistic |
Works good on my KIA too !!! | ||
| S2forever |
Coming soon is home made anti rattle spring. | ||
| Bluzm2 |
Sorry I didn't see this thread. Both of our S2's do this. I stole this idea from Shane Jewel. Put a spring over the retaining pins between the pads. Problem completely solved. I brought the pin to the hardware store with the required length measurement, found a appropriate spring. Total cost for 2 springs and no more rattles was about 3 bucks. I'll post a pic when I get a chance. Brad | ||
| Brother_in_buells |
You could use copper grease for this to! | ||
| S2forever |
Blumzm2, I think I have almost same setup now. It worked for a few days and then they rattled again as before. Probably the spring rate is not correct. But I am reluctant to use stronger springs because they may push brake pads away from rotor, then one full squeeze of brake lever wouldn't be enough to develop full pressure. I will post my current spring setup soon. | ||
| S2forever |
My current setup I do not recommend to anyone!  | ||
| Buellistic |
Do you have to pump up your brake every time before you can stop ??? | ||
| S2forever |
I pump up a few times before launching just to make sure it works. Spring is so week that it does not stop rattling and it can not back up pads. But to me it looks like a dangerous setup. | ||
| Ratbuell |
The only rattle I've ever had from front brakes is the rotor mounting pin / wave washer rattle. Pads are designed to "drag" - they're supposed to be in constant contact with the rotor. The theory is the same as the reasoning behind not using springs as shown above - you lose stopping power by potentially having to "fill the gap" every time you squeeze the brake. If your pads are not in constant contact (not pressure, just touching)...you need to properly bleed your brakes and check all your seals and fluid. | ||
| 4speeder |
Pads are designed to always drag the rotor ever so slightly and will always self adjust themselves for wear, and in wet conditions will always keep the water to a minimum on the rotor faces so instantaneous wet braking is maintained. I've followed this thread wondering how pads could rattle if the brake system is functioning properly. There should be no slop between the pads, rotor, pistons and/or caliper face. There may be excessive clearance around the pads if they do not fit snugly in the caliper and that might cause a rattle. My S2 had a rattling outer disc when I got it so I replaced the wave washers to tighten up the fit to the inner disc and that solved my rattle. It still has plenty of clearance as you can hold the front brake and rock the bike front to back and easily hear the clicking noise of the inner and outer disc moving on each other. | ||
| S1owner |
I to thought my rattle was pads but it was the 6 pin rotor. Upgraded to the 9 pin and problem was solved | ||
| Bluzm2 |
S2, No problem with the pads getting pushed out on either S2. Just enough tension to keep from rattling. | ||
| Buellistic |
See: Posted on Monday, OCTOBER 20, 2014 - 11:50 PM "I" started using this, not for rattling pads, but for the fact it held the pads to the caliper pistons, Pistons retract and with them the pads ... REASON was for eliminating resistance drag any where "I" could(also get this from too tight a primary chain and drive belt) ... ie: accelerate faster, more top speed, pads last longer, and better gas mileage ... | ||
| S2forever |
I still think noise is from pads because it stopped with springs and 9 retaining pins are snug with no front and aft play. I will pin it down further with bike on stand. It is gonna be slow tho as my bike is accessible only on weekend. | ||
| Ratbuell |
And it might be from the pads...which indicates you have another issue, because your pads are supposed to be in constant contact with the rotor. The *rotor* should keep the pads from rattling, if everything is operating properly. | ||
| S2forever |
Almost all brake calipers I know are equipped with anti-rattle spring for one reason - rattling. Buell with Nissin, PM calipers except for Buell have anti-rattle spring equipped or available. I don't believe mine has another problem but will double check and let you know. | ||
| 4speeder |
Are we talking two completely different rattle issues here in this thread? All automobiles/trucks that I've ever worked on do indeed have anti-rattle springs or steel tensioners, or little rubber shielded tensioners, BUT they are to prevent the pads from rattling in the caliper body, they are not to keep the pads spread apart, or tight up against the piston or caliper face. I've never seen a motorcycle caliper with springs to keep the pads spread apart. That defeats one of the biggest purposes of a disc brake, instantaneous wet braking. | ||
| Buellistic |
Well said, 4speeder !!! | ||
| S2forever |
4speeder, it looks like there was misunderstanding. The current coil spring setup is only to confirm the annoying noise is from pads rattling inside calipers. I should have written "Do not do this setup" instead of "Not recommended" on the picture. What I am going for is spring plate setup. Stay tuned. (Message edited by s2forever on January 14, 2015) | ||
| Ratbuell |
...but the flaw with your reasoning is, if you spread the pads away from the rotor...and the rotor is loose on its pins that attach it to the carrier...your "pad rattle proof" is actually able to prove a rotor rattle, too. If you have the OEM stepped-design rotor, or the first update version with allen head screws, nuts, and wave washers...I'm willing to bet you have a rotor rattle and not a pad rattle. There's a reason my S2 has an EBC front rotor on it  | ||
| S2forever |
Ratbuell, you understand what I meant with coil spring setup. And I understand your point. My rotor is OEM stepped design. I have installed proper thickness shims to minimize along-the-front-axle play. I thought for a long time it had no play perpendicular to the front axle but I will check. Even though there is still some play between rotor and mount (for thermal expansion), the unit feels like quite a solid single piece when you grab and shake. This is why I think the rattling noise can not be from rotor. I will start with 2 of PM anti-rattle springs for 6 piston calipers, cut and bend them to fit S2. I will let you know. It will be a slow process. OEM stepped design rotor is so good to look at that I can't replace it with anything else... | ||
| Hootowl |
I replaced mine simply so that I could preserve it. There aren't likely to be any more manufactured. | ||
| Essmjay |
Here is a photo of my setup. Dirty because it is a mild wet winter here and I keep riding. The springs were on the bike when I bought it and I always thought it was stock until I stopped by Brad's house one year on my way to Wisconsin. Works for me.  | ||
| S2forever |
Quite shocked someones are actually running this setup. The idea is simply wrong in terms of safety. | ||
| Essmjay |
The springs are not strong enough to push the pads except against the piston. They can't push the piston back so they are always against the rotor. I have almost 50000 miles on this setup. Sorry you are shocked. I feel quite safe using it. |
