the back brake on my suzuki gs500e stopped functioning. they seem to have no holding power whatsoever. before that, it worked fine...did not squeel or make any other noise. i had the bike sit for 1 week, and suddenly i had no more back brakes...what could it be? how can i troubleshoot it to figure out?
Shoes are worn out,splined shaft has sliped inside brake lever.Worn out master cylinder.
you may have a worn out master cylinder just above the brake pedal somtimes the seal fails and fluid diverts around seals
in case you had undesirable brake pads on the returned it may scrub and you are able to experience it, so in the experience that your no longer feeling that then verify your brake fluid for the returned in many circumstances you have 2 resivors one on the manage bars for front and one on the returned for the returned verify it if its finished press the brake lever each and each of how down thrice and on the 0.33 carry it open launch valve on the caliper to bleed the brake then close repeat thrice then you definately ought to have large breaks..
Check the obvious first. Adjust brake IAW owners manual if you don't have a service manual. Then check mechanical linkage from foot pedal to the rear tire. Check springs, brake rods...If this check out, the rear stay for the brake assembly should be checked to make sure the nut that secures it has not fell off. They normally have a cotter pin that prevents the nut from falling off. If none of this remedies the trouble, you will have to remove the rear tire and look at the hub and springs and brake shoes. At this point you have a couple of choices. Buy a service manual for your bike (suzuki manuals are, in my opinion, the best) or take it to a Suzuki dealer. If you have wrenched on bikes, after you fix the brakes on your machine, the money you saved just paid for the cost of the service manual. Take your time, go step by step, clean as you go, service your final drive(adjust the chain) and torque the axle nut and nut that secures the brake stay. Always use new cotter pins when you put it back together. If you don't want to put out money for tools or manuals or don't have the patience, you are best off taking your bike to the dealer. Your safety is the most important thing and how your brakes function may prevent you from getting into an accident!
pump your rear brake lever 3times then hold it for 2minutes. watch the line and make sure nothing is coming out of the brake hose/line(this is easier to do with someone else looking). if the pedal falls at all in those 2 minutes air is in the line, and you need to find the leak, then re-fill your master cylinder, then bleed the brakes. set the back of your bike on something solid, and press the brakes, have someone else move the rear wheel. if they can move it, but the brakes still feel solid, take a look at the caliper. also when was the last time you replaced the rubber brake hoses? over time the rubber on the inside of the line will brake down and flake, the outside may look fine, but the inside could be all rotted out. when the inside flakes, it starts blocking fluid flow, making the brake feel solid, when it is grabbing nothing at all. when this is the case the caliper will move enough to contact the rotor, but not enough to stop the wheel if those two don't work, check to make sure the pads are moving. at this point you will have to replace one of the more expensive pieces on your bike. while you're in there might as well install new brakes. happy hunting, kill a couple gremlins for me while you're in there :)
