Question about 2001 Yamaha YZF-R1

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I have bled the rear brake on my 2001 yamaha r1, the pedal is now soft, any ideas?

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You still have air in the system or the master cylinder is bad.

Posted on May 13, 2010

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I have a 23 t bucket and i cant get a brake pedal.when i bought it had very little brake so i replaced rear shoes and cylinders,front pads and calipers,all new lines and the master cylinder


Once you have bled the air from the brake lines,clamp off the front brake hoses carefully.Does the pedal feel better now?
Then the pad /caliper fit is allowing too much play.Is the pedal the same?Then clamp the rear hose and try the pedal.Is it fine with the rear hose clamped?If so we now know the problem is at the rear brakes.One common low pedal rear brake cause is brake shoes that do not fit the drums.Remove the drums and look at the shoes,are they showing contact wear fully or just in the middle of the shoe?Remove a shoe and place it in the drum.Can you rock the shoe against the drum surface?Once drums have been resurfaced,the shoes will not fit fully against the drum allowing the shoe the flex when applying pressure to it and this can easily create a low soft brake pedal. Of course rear brake adjustment must be correct once brake shoe contact is correct.To correct brake shoe contact,have your shoes re arc-ed to fit resurfaced drums or install new drums.Don't overlook brake master cyl /brake pedal push rod adjustment too.

Jun 24, 2017 | Cars & Trucks

1 Answer

Everything except the brake lights work on my 2001 R1 Yamaha


Hi, Candace good for you any type of wiring harness installation is no small quickie and fixing the brake light is easy before diagnosing any brake light issue always check the bulb and fuse first for integrity a brake light staying on is usually caused by the front brake light switch, which is mechanical, not disengaging. On early models moving the throttle control housing closer to the front brake master cylinder is the main fix. On late models, the switch gets tweaked and needs to be realigned. A brake light that does not come on when the brake lever is applied can be caused by a faulty switch or no continuity in the wiring at the switch. The rear brake light switch is hydraulic and it is extremely rare to malfunction in a closed circuit condition causing the brake light to stay on. Usually, rear brake light switch issues are caused by no brake pedal free play or a sticky rear master cylinder piston. A brake light that does not come on when the rear brake pedal is depressed can be caused by a faulty switch, air contamination in the brake line, or no continuity in the wiring at the switch. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
2000 2001 Yamaha YZF R1 Service Manual R1 Moto Data Project
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals
Yamaha R1 Performance upgrade 1
Yamaha YZF R1 00 01

Aug 26, 2016 | 2001 Yamaha YZF-R1

1 Answer

2001 Silverado 2500 HD Why Rear brakes don't work after I installed new hydro-boost power booster, master cylinder, calipers, and pads. I bled master cylinder before installing, and brakes beginn


Hello Patricia,

Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
been discovered when you had the system bled.

The only time I ever had a rear brake problem with a 2500 series Chevrolet was due to seized rear brake caliper guide pins...as your calipers are also new that is not your problem.

If your brake pedal feels spongy and travels to the floor board you have air in the system, a brake fluid leak or a failure in the power steering system, such as a broken hose, broken power steering pump drive belt, or failed pump, would result in a loss of pressure to both the hydro-boost and steering.

Find more information here:

. Hydro Boost Power Assist Systems Operation Diagnosis and Repair

Jul 23, 2017 | 2001 Chevrolet Silverado 2500HD

1 Answer

I replaced disc brake pads, rear shoes. wheel cylinder,master cylinder, power brake booster all new. Question: My brake pedal is not solid,goes low to the floor almost. I have bled the master cylinder 1st,...


Check your lines going to the brakes the rubber hose on the 1993 chevy have a tendancy to crack and brake are you using an excess of brake fluid

Sep 12, 2011 | 1993 Chevrolet C1500

1 Answer

1999 Ford E350 van problem: brake pedal is soft; have replaced master cylinder, rear wheel cylinders, rear brake shoes and drums, front calipers, rotors and discs; have bled master cylinder before...


Good question, on the antilock system is a bleader too and bleade it the same way you bleade the caliper. After all is done adjust the rear brakes, they should have a drag to them.

Feb 23, 2011 | 2007 Ford E-350 Super Duty Length XLT

1 Answer

My 1997 gmc 1500 has developed a "soft" pedal and the I P lights have come on. If I clamp a pair of vise grips on the rear brake hose before the "T:|"the pedal becomes firm. I have bled the brakes many...


Hi, you are experiencing the GM brake pedal, this is a common problem, most of the time the abs module is to blame. if air gets trapped in the module it will always be spongy. you need to crack the bleeders just after the abs unit and have an assistant push down on the pedal and do a "non-pressure" bleed on this to get the air out. then bleed the whole system all over again. good luck and buy brake fluid in bulk. I went through 3 big bottles before i got all the air out.

May 19, 2010 | GMC Sierra 1500 Cars & Trucks

1 Answer

I have a 2000 chevy blazer. had to short fix left rear brake line with hose and clamps. bled air from that side, brakes were soft in the pedal. checked right rear for any air had none. brakes still feel...


do not drive the vehicle. remove the hoze. replace it with steel line. rubber hoses are not meant for the high pressures of brake lines. it is expanding when you press the brake pedal. very unsafe.

Mar 23, 2010 | 2000 Chevrolet Blazer

1 Answer

Brake Problems


the only thing left unless you have a leak is the proportioning valve A soft pedal can also be caused by badly adjusted rear brakes but you shouldn't experience a pedal fade right to the floor with bad adjustment.

May 15, 2009 | 1995 Chevrolet C1500

1 Answer

SOFT BRAKE PEDAL ON MY DAEWOO


MAKE SURE THE ARE NO OTHER LEAKS.IF U DID NOT BENCH BLEED THE MASTER CYLINDER BEFORE U PUT IT ON U PROBLEBLY HAVE AIR IN THE SYSTEM.BLEED THE MASTER CYLINDER AT THE LINES THAT COME OFF OF IT.THEN U NEED TO BLEED THE REAT OF THE BRAKES IN THIS ORDER.RIGHT REAR,LEFT FRONT,LEFT REAR.RIGHT FRONT.WHEN BLEEDING THE BRAKES WAIT 15 SECONDS BETWEEN PUMPS OF THE BRAKE PEDAL.IF U GO TO FAST U CAN DAMAGE THE MASTER CYLINDER.GOOD LUCK

May 01, 2009 | Daewoo Leganza Cars & Trucks

1 Answer

Soft pedal,30 percent brakage


Air in Brake system need to be bled or master-cylinder is BAD. Noise in rear can be alot of different things NOT related to Soft pedal for example bent backing plate,wheel bearing etc. I would recommend removing brake drum and take a look at brakes in the rear contact if you need more help. Good Luck. Thanks for using FIX-YA

Jan 08, 2009 | 1987 Honda Accord

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