Question about 1987 Yamaha YX 600 Radian

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My foot brake peddle does not return to up position when depressed.

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Typically there should be 2 springs attached to brake pedal.....a light spring to the brrake light switch, and a heavier spring attached at one end to the frame and the pedal at the other end to assist the pedal to return to rest.
First is the spring still there or missing....if its there....does the installation allow the spring to
stretch when depressing the pedal, so it can contract when the pedal is released?

If that looks right.....look for the shaft where the pedal shaft rotates as you depress pedal....the shaft needs lubrication with grease to allow it to rotate freely.

Posted on Apr 03, 2011

Testimonial: "thx for fast response. great info !"

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There is a running pump sound when I put on brakes and sometimes when I don't hit brakes and a grind sound


Shelly, in most cases, these can be cured by replacing your brake pads/shoes. However, you stated that you are hearing a "pump" sound when you depress the brake peddle. So this is telling me that you may have either a vacuum issue, or having an issue with your "Brake Booster". That also runs off a vacuum. A little info for you. ^^ When your engine is running, the entire system is put under a negative vacuum. This controls things like cruise control, and vacuum assisted brakes. Older vehicle did NOT have a vacuum assist, and were called "Manuel Brake" systems. While these were more reliable, the were harder to push the peddle until the brakes worked. As an example, with your car turned off, depress your brake peddle about 3 times and then try to press it as if you were stopping. You will find that the peddle is much harder to press than if the engine were running under the vacuum. The reason I asked that you depress the peddle 3 times, is when the engine is off, you are no longer building pressure, so this pressure is naturally bled off when you use the brakes. If this does not happen, and your brakes are always hard to depress, then for sure your having a problem with your brake booster. I hope this helps, and good luck. ^^

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