Bashan Storm Rear Master Cylinder Problems

lprewitt · 07-04-2017, 02:13 PM

Well, I have put almost 2000 miles on my Storm since last October. It has been great. Engine is just now freeing up on acceleration and cruising at 55 mph. BUT, now the problem: I got on my bike after a week of not riding it (we were out of town). I drove it down the street just to find out that I had no rear brake. I immediatelly turned around headed back to the house for inspection. I found out that the pressing the brake pedal did nothing to compress the rear calipers and no rear brake light. So, my guess was that air had somehow gotten into the rear brake system. I then attempted to bleed the air out of the master cylinder (I have done this many times on Honda car clutch slave cylinders and brake system). But, to my disappointment, no fluid from the bleed screw after holding down the rear brake pedal and opening/closing the bleed screw. Repeated it many times; still no fluid from the bleed screw and nothing happening to the fluid in the reservoir. So, my guess is that the piston in the brake master cylinder is stuck. Since I have no brake light, the pressure switch in the master cylinder for the light is not being closed either due to no pressure. Has anyone else experienced this? Or, I'm probably missing something and sure would appreciated the expertise from this forum. Thanks.

Ariel Red Hunter · 07-04-2017, 03:52 PM

Quote:

Originally Posted by lprewitt

Well, I have put almost 2000 miles on my Storm since last October. It has been great. Engine is just now freeing up on acceleration and cruising at 55 mph. BUT, now the problem: I got on my bike after a week of not riding it (we were out of town). I drove it down the street just to find out that I had no rear brake. I immediatelly turned around headed back to the house for inspection. I found out that the pressing the brake pedal did nothing to compress the rear calipers and no rear brake light. So, my guess was that air had somehow gotten into the rear brake system. I then attempted to bleed the air out of the master cylinder (I have done this many times on Honda car clutch slave cylinders and brake system). But, to my disappointment, no fluid from the bleed screw after holding down the rear brake pedal and opening/closing the bleed screw. Repeated it many times; still no fluid from the bleed screw and nothing happening to the fluid in the reservoir. So, my guess is that the piston in the brake master cylinder is stuck. Since I have no brake light, the pressure switch in the master cylinder for the light is not being closed either due to no pressure. Has anyone else experienced this? Or, I'm probably missing something and sure would appreciated the expertise from this forum. Thanks.

Are you running the original brake fluid that came with the bike? ....ARH

lprewitt · 07-04-2017, 05:19 PM

Unfortunately, Yes. I bought it from a local dealer. I was under the impression that the fluids had been changed. But, it is a holiday weekend and the dealer won't be open until tomorrow. I will try to get this settled through them but these bikes have a very limited warranty. The dealer has a good reputation, so hopefully they'll resolve this or be helpful. I am afraid, though, that the fluid has just gummed up the master cylinder and the little piston is stuck...... Yes, should have just changed the fluid to be safe.

ricardoguitars · 07-04-2017, 06:01 PM

Mine had leaked from the reservoir hose attachment and from the bleeding nipple, and from the reservoir cap; not a bad idea to check for leaks.

Megadan · 07-05-2017, 01:24 AM

Sounds to me like the piston seal inside the master cylinder let go. If the piston stuck, the rear pedal wouldn't move at all. It may be possible to find a rebuild kit for it, but you could also simply look into a new one, or even adapting something from another bike.

lprewitt · 07-06-2017, 06:36 PM

Quote:

Originally Posted by Megadan

Sounds to me like the piston seal inside the master cylinder let go. If the piston stuck, the rear pedal wouldn't move at all. It may be possible to find a rebuild kit for it, but you could also simply look into a new one, or even adapting something from another bike.

Thanks. I called the local dealer, again. They're a small shop. Looks like they are out on vacation until the 17th. Was hoping they had a rebuild kit in stock. Guess I'll have to wait another week. Meanwhile, I'll take it apart and see what's causing the issue. Just part of the experience

2LZ · 07-07-2017, 10:36 AM

You don't rebuild these, you replace. Dirt cheap.
Here's a link to search just in case they blow you off.

https://www.amazon.com/s/ref=nb_sb_n...ke+brake+parts

lprewitt · 07-08-2017, 11:30 AM

Quote:

Originally Posted by 2LZ

You don't rebuild these, you replace. Dirt cheap.
Here's a link to search just in case they blow you off.

https://www.amazon.com/s/ref=nb_sb_n...ke+brake+parts

Thanks, 2LZ. You're right; not worth the rebuild. Now, to just find the one that fits

lprewitt · 07-09-2017, 06:40 PM

Well, I did purge the "old" brown brake fluid from the master cylinder. Bled the line until the fluid ran clear with new DOT3. Well, even though there are still very tiny bubbles in the line, I now have a rear brake and the brake light comes on. So, for now, I'm going to call that good. May have to bleed it more but at least it works and the old grimey brown fluid is out of the system. Thanks for the inputs. ** NOTE: this picture was taken before the old fluid was purged. Notice the brown color in the fluid reservoir.

Ariel Red Hunter · 07-10-2017, 09:59 AM

Quote:

Originally Posted by lprewitt

Well, I did purge the "old" brown brake fluid from the master cylinder. Bled the line until the fluid ran clear with new DOT3. Well, even though there are still very tiny bubbles in the line, I now have a rear brake and the brake light comes on. So, for now, I'm going to call that good. May have to bleed it more but at least it works and the old grimey brown fluid is out of the system. Thanks for the inputs. ** NOTE: this picture was taken before the old fluid was purged. Notice the brown color in the fluid reservoir.

While you are on a roll, do the front brake too...ARH

2LZ · 07-10-2017, 10:37 AM

Good to hear you got it working!...and as ARH says, ddo the front also. It's worth the 1/4 cup of fluid by the time you're done.

Man....I sure like that shade of orange you have on that Storm. Super nice.

lprewitt · 07-12-2017, 07:52 PM

Quote:

Originally Posted by Ariel Red Hunter

While you are on a roll, do the front brake too...ARH

Will do, ARH...... that old stuff is bad!

lprewitt · 07-12-2017, 08:14 PM

Quote:

Originally Posted by 2LZ

Good to hear you got it working!...and as ARH says, ddo the front also. It's worth the 1/4 cup of fluid by the time you're done.

Man....I sure like that shade of orange you have on that Storm. Super nice.

Thanks, 2LZ. I get many compliments on it. As the norm, I get questions all the time..."what kind of bike is that, KTM?". But I do like the color.

Tomkay44 · 11-28-2021, 10:28 PM

That is a nice looking bike.
Can any of y'all point to a "How to Blead TBR7 Rear Disc Brakes" video or thread. I took my rear wheel off on my new TBR7 to grease the swingarm & rear axle, now the calipers are closed. Won't open.

buzz · 11-29-2021, 12:36 AM

has nothing to do with brake light,switch is pulled by spring to come on. not inside of brake master cylinder.

07-04-2017, 02:13 PM	#1
lprewitt Join Date: Aug 2016 Posts: 56	Bashan Storm Rear Master Cylinder Problems Well, I have put almost 2000 miles on my Storm since last October. It has been great. Engine is just now freeing up on acceleration and cruising at 55 mph. BUT, now the problem: I got on my bike after a week of not riding it (we were out of town). I drove it down the street just to find out that I had no rear brake. I immediatelly turned around headed back to the house for inspection. I found out that the pressing the brake pedal did nothing to compress the rear calipers and no rear brake light. So, my guess was that air had somehow gotten into the rear brake system. I then attempted to bleed the air out of the master cylinder (I have done this many times on Honda car clutch slave cylinders and brake system). But, to my disappointment, no fluid from the bleed screw after holding down the rear brake pedal and opening/closing the bleed screw. Repeated it many times; still no fluid from the bleed screw and nothing happening to the fluid in the reservoir. So, my guess is that the piston in the brake master cylinder is stuck. Since I have no brake light, the pressure switch in the master cylinder for the light is not being closed either due to no pressure. Has anyone else experienced this? Or, I'm probably missing something and sure would appreciated the expertise from this forum. Thanks.
	0

07-05-2017, 01:24 AM	#5
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,110	Sounds to me like the piston seal inside the master cylinder let go. If the piston stuck, the rear pedal wouldn't move at all. It may be possible to find a rebuild kit for it, but you could also simply look into a new one, or even adapting something from another bike. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
	0

07-07-2017, 10:36 AM	#7
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,112	You don't rebuild these, you replace. Dirt cheap. Here's a link to search just in case they blow you off. https://www.amazon.com/s/ref=nb_sb_n...ke+brake+parts __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	2

07-10-2017, 10:37 AM	#11
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,112	Good to hear you got it working!...and as ARH says, ddo the front also. It's worth the 1/4 cup of fluid by the time you're done. Man....I sure like that shade of orange you have on that Storm. Super nice. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	1

07-04-2017, 05:19 PM	#3
lprewitt Join Date: Aug 2016 Posts: 56	Unfortunately, Yes. I bought it from a local dealer. I was under the impression that the fluids had been changed. But, it is a holiday weekend and the dealer won't be open until tomorrow. I will try to get this settled through them but these bikes have a very limited warranty. The dealer has a good reputation, so hopefully they'll resolve this or be helpful. I am afraid, though, that the fluid has just gummed up the master cylinder and the little piston is stuck...... Yes, should have just changed the fluid to be safe.
	0

07-04-2017, 06:01 PM	#4
ricardoguitars Join Date: Jun 2016 Location: Costa Rica Posts: 82	Mine had leaked from the reservoir hose attachment and from the bleeding nipple, and from the reservoir cap; not a bad idea to check for leaks.
	0

11-28-2021, 10:28 PM	#14
Tomkay44 Join Date: Oct 2021 Location: Lumberton TX (Southeast TX) Posts: 110	That is a nice looking bike. Can any of y'all point to a "How to Blead TBR7 Rear Disc Brakes" video or thread. I took my rear wheel off on my new TBR7 to grease the swingarm & rear axle, now the calipers are closed. Won't open.
	0

11-29-2021, 12:36 AM	#15
buzz Join Date: Dec 2020 Location: Dayton Pa. Posts: 953	has nothing to do with brake light,switch is pulled by spring to come on. not inside of brake master cylinder.
	0