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**The Monk** · 09-30-2013, 01:14 PM

Re: Disk Brake Problem (Suzuki GS150R)

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**Rakesh Rok** · 09-30-2013, 01:29 PM

Re: Disk Brake Problem (Suzuki GS150R)

Best thing as your bike is new, just show it to the ASC instead of local mechanics and get it repaired under warranty and don't waste any money outside. . .

Cheers!!!

**rreneav1987** · 09-30-2013, 01:51 PM

Re: Disk Brake Problem (Suzuki GS150R)

Originally posted by Rakesh Rok View Post

Best thing as your bike is new, just show it to the ASC instead of local mechanics and get it repaired under warranty and don't waste any money outside. . .

Cheers!!!

I would go with this option, the ASC will know what to do and in case they don't fix it, you will always have the chance to blame them...

**lockhrt999** · 09-30-2013, 04:44 PM

Re: Disk Brake Problem (Suzuki GS150R)

You must have depressed the lever when the reservoir was empty. No wonder it's spongy. I know this because ASCs are bi_ch and they put a tonne of air in my braking system once.

Re bleed the brakes.

**rreneav1987** · 09-30-2013, 06:03 PM

Re: Disk Brake Problem (Suzuki GS150R)

Originally posted by lockhrt999 View Post

You must have depressed the lever when the reservoir was empty. No wonder it's spongy. I know this because ASCs are bi_ch and they put a tonne of air in my braking system once.

Re bleed the brakes.

yup, you are right..

@TS, when you rebleed the brakes, make sure you rebleed without any air bubbles

**rx100.7050** · 09-30-2013, 06:05 PM

Re: Disk Brake Problem (Suzuki GS150R)

Cleaned disc brakes with petrol???? From where did you get this idea. There are brake cleaning sprays available. Also, clean the discs with normal soap solution.

Go through this...

Workshop: How To Bed In Disc Brake Pads - BikeRadar

**aargee** · 09-30-2013, 09:49 PM

Re: Disk Brake Problem (Suzuki GS150R)

Originally posted by reachsamik View Post

Please help me in this regard. and if anyone knows a mechanic in Kolkata ,West bengal who can fix it properly please advise me.

Thank you. looking forward for your valuable inputs.

How about fixing it yourself, PROVIDED, you've the tools?

Here's what you need to do...
0. Remove the caliper kit, oil the caliper pistons using DOT3/4 brake oil, open the master cylinder cap, use C-Clamp to push in the piston to home position
1. Bleed out the entire brake oil from the master cylinder WITHOUT touching the brake lever even using a feather (hope you know how)
2. Keep filling in DOT4 brake oil in the master cylinder WITHOUT touching the brake lever AND until entire bubbles disappears + there's free flow of DOT 4 brake oil through the brake drain bolt/bleed nut
3. Fill in the DOT4 brake oil to the master cylinder until 2/3rd is full
4. Tighten the brake drain bolt to torque
5. Tighten the master cylinder cover to torque
6. Pump the brake lever until it's tightened
7. If there's still spongy, then loosen the drain bolt to bare minimum & follow steps from 3

Post dedicated to @psr Sir & Sir, kindly confirm if I'm a disc brake ENGINEER

hehe

**reachsamik** · 09-30-2013, 10:54 PM

Re: Disk Brake Problem (Suzuki GS150R)

After riding it for 100 kms the brake is little better than what was. I will try rebleeding it myself . will post the outcome.

Sent from my XOLO Q800 using Tapatalk 2

**Cleaner** · 10-01-2013, 12:54 AM

Re: Disk Brake Problem (Suzuki GS150R)

There were a lot of mistakes in here, let me start.

1. The screeching sound (I assume, it's not the squealing sound like in Deliverance) is common and happens when theirs dirt or other things gets into the brake assembly. The dust on the brake pads causes this too.

2. The mechanic sanded the pad which was not necessary according to me, the pads were just settling down after 1000Kms of riding.

3. The bleeding process was not correct, there are air bubbles inside the brake hose I think. Then somebody topped up with "new" Castrol DOT3 brake fluid, here's what went wrong, GS150R comes delivered with DOT4 in it, and you topped up with old DOT3 brake fluid. Brake fluid turns red when it's old only, always replenish brake fluid from a sealed container only. By using old brake fluid, you contaminated the new fluid you had inside your brake assembly. I suggest you to replace the brake fluid with new DOT4 fluid from a sealed container, and new brake fluid is transparent, like water.

From now on, never take your bike to a roadside mechanic for service, and especially, if they say something like "it'll be good after riding for some time", know that something is wrong. Actually I should not be saying this as I'm a roadside mechanic myself, but there are very few mechanics out there who actually know how to get the job done.

**reachsamik** · 10-01-2013, 01:01 AM

Re: Disk Brake Problem (Suzuki GS150R)

Originally posted by Cleaner View Post

There were a lot of mistakes in here, let me start.

1. The screeching sound (I assume, it's not the squealing sound like in Deliverance) is common and happens when theirs dirt or other things gets into the brake assembly. The dust on the brake pads causes this too.

2. The mechanic sanded the pad which was not necessary according to me, the pads were just settling down after 1000Kms of riding.

3. The bleeding process was not correct, there are air bubbles inside the brake hose I think. Then somebody topped up with "new" Castrol DOT3 brake fluid, here's what went wrong, GS150R comes delivered with DOT4 in it, and you topped up with old DOT3 brake fluid. Brake fluid turns red when it's old only, always replenish brake fluid from a sealed container only. By using old brake fluid, you contaminated the new fluid you had inside your brake assembly. I suggest you to replace the brake fluid with new DOT4 fluid from a sealed container, and new brake fluid is transparent, like water.

From now on, never take your bike to a roadside mechanic for service, and especially, if they say something like "it'll be good after riding for some time", know that something is wrong. Actually I should not be saying this as I'm a roadside mechanic myself, but there are very few mechanics out there who actually know how to get the job done.

Thats right , I also thought that it wont settle after few kms, as if the pads are not bedded in then it might not grip the rotor well , but the brake lever should not be spongy, however I was also thinking about the point of DOT 3 & DOT 4. though the DOT3 oil which the mechanic poured was new and costed me 48Rs.

I will try getting a DOT 4 oil ( can you please tell me the cost of it? as it is not available in my area , all of the shops are with stock of DOT 3 only) and bleed the brakes again ( first myself , if unsuccessful then will visit the SC)

**Cleaner** · 10-01-2013, 01:46 AM

Re: Disk Brake Problem (Suzuki GS150R)

Around 100 rupees for a 250ml bottle of Castrol DOT4. There are red colored brake fluids too, but opt for transparent ones as it's easy to notice the degradation on it. You can mix Dot3 and DOT4 but for peace of mind, replace the brake fluid with new DOT4 as it does not cost much.

**reachsamik** · 10-04-2013, 12:54 AM

Re: Disk Brake Problem (Suzuki GS150R)

Hi!
I tried my level best to re bleed the brake with DOT 4 oil, the brake is somewhat better than what it was , but still it is missing that bite.

and I need to pull the brake little more to stop the bike , the lever is still little spongy, I have taken two snaps one is normal lever position without applying brake , and the second one is the maximum possible pull. As far as i remember when it was perfect , it did'nt used to allow me to pull the lever this much.

what to do , as whomever ( mechanic) i show my bike , he just adjusts the brake but the problem remains , and when i try to explain him ( the mech.) that it was a lot better ago , he just drives the bike and reports that the brakes are ok , but I know it is not

anyone knows any mechanic who can understand the feeling of mine, and help me to regain its lost glory.
should i change the brake pads?

[ P.S : you may ask that why i am not opting for the service center , the answer is , the service center is little far , and till now whomsoever i have shown my bike , reported that its ok. so if i get the same treatment in the SVC, center , my last hope will be dead , so till now I am keeping that last option in my hand , if nothing works then I will go to the service center , and if required I am ready to change the whole assembly too

]

**V!RU$** · 10-04-2013, 04:25 AM

Re: Disk Brake Problem (Suzuki GS150R)

Since you mentioned the bike is just 1 month old.
I suggest that you get the bike diagnosed in the ASC because if
a part fails too early like in yours, then it is most probably a manufacturing defect.

I don't want to give you any false hopes but you can try this method for reducing the
free play in the lever
*pump the brake few times
*hold the brake and tie a cloth or piece of rope around the accelerator and the lever
So that the brake remains pressed
*leave it overnight
If the free play reduces then do it again and bleed a little fluid to check for
any air bubbles
Hope this helps....

**petrolhead_chn** · 10-04-2013, 09:39 AM

Re: Disk Brake Problem (Suzuki GS150R)

Originally posted by reachsamik View Post

Hi!
I tried my level best to re bleed the brake with DOT 4 oil, the brake is somewhat better than what it was , but still it is missing that bite.

I understand how you feel. Relax! It can be fixed

.
If you could explain as how did you bleed and refill the oil, we can probably rule out the errors in procedure followed. I had a similar situation on my P150 and I had to change the master cylinder assembly.

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Disk Brake Problem (Suzuki GS150R)

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