Question about 2006 Hyosung MS3 125

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Help with piston

Iv changed the break pads and break fluid and bled it the rear is fine but the front was geting no presser on the leaver so iv taken the front calliper off and seen one of the piston s was not coming out iv had my air line on it but it just won't budge thank for your help

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Push piston back may have a ridge build up.if so ,lightly scrape or sand it down.---bingo

Posted on Jun 15, 2014


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Posted on Jan 02, 2017

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SOURCE: hey i'm having some trouble

Im not to familure with these bikes, im more of a harley guy, but i have a couple suggestions:
1. You may not have air in the lines (air bubbles may not surface the master cylinder) but, I have seen where air gets trapped in the caliper, or banjo bolts. Try when blleding them, when you put prssure on the lever, crack the banjo bolts and tighten, then pump them up again.
2. Same thing, I have also seen air trapped in the master cylinder, try bleeding the banjos again.
3. Make sure the brake disk is still has plenty of thickness, and your not right at or below the service limit.
4. If you have a 2 piston or 4 or 6 piston caliper, make sure when you pull in the lever, all your pistons are coming out and sucking back in evenly.
5. Make sure your using the correct brake pads.
6. Always make sure your using the correct DOT brake fluid, its very dangerous if you dont, and can KILL YOU.

Hope this helps some.

Posted on May 12, 2011

  • 279 Answers

SOURCE: can any1 help is it right my rear break lever on my hyasung ms3 125 also works my front left break

yes this is very common for dual front brakes. The thought behind this is that you will get a 60/40 split in your braking from back to front to maintain control in a braking situation.the hand brake gives you additional stopping power in a panic situations.happy riding

Posted on May 07, 2014

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1 Answer

Advice on bleading the rear and the front break do I do this the same way as the right frontbreak

Both front and rear brakes have identical style bleeder valves, and each corresponds to one of the fluid reservoirs on the handlebars. Both are bled the same way. Hope that helps.

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1 Answer

Can any1 help is it right my rear break lever on my hyasung ms3 125 also works my front left break

yes this is very common for dual front brakes. The thought behind this is that you will get a 60/40 split in your braking from back to front to maintain control in a braking situation.the hand brake gives you additional stopping power in a panic situations.happy riding

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Check the caliper sliders, they may be seized causing limited brake pad contact. Also check the calipers for siezed pistons.
After bleeding the system, sometimes the proportioning valve will have to be reset manually. You can do this by having an assistant press the brake pedal and open a bleeder screw slightly on one side [ front or rear ] of the system, it may reset. If not, try doing the other side of the system.
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A booster cannot cause a low pedal. (unless it is boosting too good...which will put your face through the windshield - LOL!) If you have replaced all that stuff, you probably have lots of air in your lines. Many times, "normal" bleeding will not remove this air. The best way to cure this is to do a "Radical" bleed. You need to start at the right rear wheel. Make sure that your master cylinder is full. Open the bleeder screw at the right rear wheel and pump the pedal about 15 times. DO NOT close the bleeder screw while doing this. Be careful to watch the master cylinder so you do not run it out of fluid. (If you run it out of fluid you will have to start over) Leaving the bleeder open, refill the master cylinder and allow the right rear to gravity bleed (just let it drip) for about 1 minute, then close the bleeder screw. Repeat this process next with the left rear, then the right front, and lastly with the left front. Top-off the master cylinder again and pump the pedal HARD. Then open the bleeder at the right rear and close it again as with "Normal" bleeding. Do this at least twice or until it stops spitting air, whichever comes first. Repeat this process also with the left rear, right front and left front. Top-off the master cylinder ... the problem should be fixed.

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sounds like the flexable line close to the wheel is bad.
it has plastic inside it and when they get old the plastic breaks apart and plugs the line.

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1 Answer

Change break pads

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