l05tb0y Posted February 26, 2014 Report Share Posted February 26, 2014 Hi all, just bought an 09 Beta Evo 250 (mint bike) so I went to Warden Law on Sunday for a bit practice. After about 10 mins a squeaking started & im sure it was from the rear brake, this went on for a while. Then I stopped for a cuppa for 10 or 20 mins. Then got on the bike again and it was fine, then after another 10-15 mins it started again. Can anyone shed some light on this annoying problem. Thanks Dave Quote Link to comment Share on other sites More sharing options...
dan williams Posted February 26, 2014 Report Share Posted February 26, 2014 Does the squeak go away when you touch the brake pedal? Quote Link to comment Share on other sites More sharing options...
l05tb0y Posted February 26, 2014 Author Report Share Posted February 26, 2014 sometimes if you press hard down on the lever Quote Link to comment Share on other sites More sharing options...
dan williams Posted February 26, 2014 Report Share Posted February 26, 2014 Hmmm Typically the squeak is the pads grabbing and releasing the rotor a tiny bit at a time causing a high speed oscillation. If that's happening usually stepping on the brake lightly stops the pads from vibrating. If you have to step hard to make the squeak go away it is probably something else. Do the brakes work well? Sometimes pads get contaminated with oil and that makes them behave odd. An old trials trick is to ride a bit dragging the brake to heat up the rotor and then pouring water on them. Another thing you might want to check is grab the rear wheel and give it a tug to make sure your wheel bearings are good. A bad bearing can squeal under load. Aluminum frames also have a tendancy to squeak and it's possible you have a moving skid plate or other frame component. Sometimes a targeted squirt of WD40 will eliminate a squeak long enough to identify the offending component. Springs on Betas also tend to squeak. Again a squirt of WD40 can identify. If you can give us a more through description maybe we can narrow it down a bit more. The jamming on the pedal thing makes me think you're torquing something to kill the squeak so it could be almost anything. I think squeaks are just one of those Beta things we accept as part of the brand. Quote Link to comment Share on other sites More sharing options...
cactusjack Posted February 27, 2014 Report Share Posted February 27, 2014 I don't think I have watched a trials video of any of the top riders where the rear brake doesn't squeal or squeak. I think it seems to be a fairly normal condition on a trials bike and something you may just have to get used to. Quote Link to comment Share on other sites More sharing options...
lineaway Posted February 27, 2014 Report Share Posted February 27, 2014 Could be a shock bolt. Pull, lube, replace Quote Link to comment Share on other sites More sharing options...
0007 Posted February 27, 2014 Report Share Posted February 27, 2014 They have wheel bearings the size of a child's toy and they don't live long I get brake chatter on mine when wet, is it that? Quote Link to comment Share on other sites More sharing options...
oz thumper Posted February 27, 2014 Report Share Posted February 27, 2014 Hi all, just bought an 09 Beta Evo 250 (mint bike) so I went to Warden Law on Sunday for a bit practice. After about 10 mins a squeaking started & im sure it was from the rear brake, this went on for a while. Then I stopped for a cuppa for 10 or 20 mins. Then got on the bike again and it was fine, then after another 10-15 mins it started again. Can anyone shed some light on this annoying problem. Thanks Dave when you have been running a while check if the disc is hot and if the rear brake is dragging on. If there is no free play between the pedal and the master cylinder it will seal off the return port and cause rear brake to drag when the fluid expands a little. This is general not Beta specific and is a common problem where people like instant back brake. A colleague had his like this without problem on "pocket handkerchief" trials but had the rear brake lock on almost solid when on a longer time and observation event. in your case it may be coming on just enough to squeal. Quote Link to comment Share on other sites More sharing options...
wobblenorbed Posted February 27, 2014 Report Share Posted February 27, 2014 Pop it off and give it a good clean. Check fir crud under the rubbers. Push the piston back to make sure it is working properly. Sounds like it just needs some tlc. Good luck. P.S. Are you going to the trial on the ninth ? I think it`s a Tweed valley trial. It`ll be my first and last this year due to illness. Might see you there. Message me if you fancy going and want a buddy to ride with. Quote Link to comment Share on other sites More sharing options...
l05tb0y Posted February 27, 2014 Author Report Share Posted February 27, 2014 Come to think of it, when I got the bike it seemed to be dragging a bit as though the brake was stuck on when I pushed it over to my van. When I got it home I striped it down and cleaned it which involved taking the front and rear wheel off. I cleaned the callipers out and re- fit the back wheel and it seemed a lot smoother. But now after riding it the rear wheel seems not to spin free enough when you spin the wheel off the ground. So next question is how do I cure it from dragging. Quote Link to comment Share on other sites More sharing options...
lineaway Posted February 27, 2014 Report Share Posted February 27, 2014 Tough call as the Beta never free wheeled well. Also you did check if the disc is bent? Quote Link to comment Share on other sites More sharing options...
mickd Posted February 28, 2014 Report Share Posted February 28, 2014 had a ride on my 2013 beta 200 and its the rear brake squeaking so sounds to me that its normal Quote Link to comment Share on other sites More sharing options...
tman427 Posted March 4, 2014 Report Share Posted March 4, 2014 Hi all, just bought an 09 Beta Evo 250 (mint bike) so I went to Warden Law on Sunday for a bit practice. After about 10 mins a squeaking started & im sure it was from the rear brake, this went on for a while. Then I stopped for a cuppa for 10 or 20 mins. Then got on the bike again and it was fine, then after another 10-15 mins it started again. Can anyone shed some light on this annoying problem. Thanks Dave Check all rear pivot points and make sure they are greased. My 2011 Evo had a squeek that turned out to be swingarm bearing that needed lube...quick spray of wd40 to identify. Quote Link to comment Share on other sites More sharing options...
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