My busa is haunted...what could be wrong

xtreme power · 19th August 2009, 13:41

Was a normal tuesday
Went a bit offroading
then in a 350 bhp honda city dash
later that night decided to take the busa for a spin. After coming back into the buildind was doing about 60kmph and suddenly the front brakes just locked and i got flung over the handle bars, right in front of the bike.
And then suddenly as if the brake unlocking themself the bike picked up speed and squashed me between the its front end and my buildind compound wall.
As a result suffered a hip dislocation and a badly bruised arms and feet.

just wanted to know what could be the problem for this weird locking.
Im 100% sure i did not have my hand anywhere close th the brake

musicmanaman · 19th August 2009, 13:45

Hope you are fine, and the ingury is not serious.

How can the busa act like that, the breaks cannot suddenly engage and then dis-engage, very very strange, unless as you mentioned the bike is really haunted.

In any case get the front break tested.

bblost · 19th August 2009, 13:51

Is there anything stuck between the front wheel and the mud guard?

Shan2nu · 19th August 2009, 14:00

It could have been the ECU.

This happens on my car sometimes.

Basically my O2 sensor is not working, so the ECU while making some adjustments makes the engine bog down and then suddenly increases revvs.

On a car it just feels like a jerk but on a bike with close to 800-850bhp/ton, it could do some damage.

Shan2nu

deky · 19th August 2009, 14:04

Good Lord, Hope you recovering well.

Shan2nu, can it happen to any car or a bike? How do we ensure it doesnt happen??

JayPrashanth · 19th August 2009, 14:08

This looks like a major electronics screw up. Very scary. Hope you are recovering well Xtreme Power.

Meanwhile, is your bike with the Suzuki A.S.S now?

Cheers,

Jay

Shan2nu · 19th August 2009, 14:56

Quote:

Shan2nu, can it happen to any car or a bike? How do we ensure it doesnt happen??

Yeah it could happen to any car using an ECU.

Just get the ECU checked for error readings.

Shan2nu

fast_elegance · 19th August 2009, 15:03

This is really scary. Brakes locking/unlocking on own

. How can this be caused because of ECU? I guess the ECU only manages the way the engine responds. Correct me if i am wrong

.

Jaggu · 19th August 2009, 15:09

Hope you are doing ok now!

From the sound of it, your front wheels jammed up momentarily, if it was engine cut off such violent tossing wouldnt have happened, at the best rear wheel would have locked up and the bike would have skidded.

If you have ruled out anything external jamming the wheel, like something get stuck between the tire and mudguard, you need to check the actual wheel assembly and brakes. Wheel bearings can seize up if they are conked and you had a nice blast before this. Brakes am still not sure since you mentioned keeping your hands off them, unless the brake fluid tube got twisted to apply pressure to the disc.

Anyways wish you a speedy recovery and do a thorough build up of front end before anybody rides her.

ph03n!x · 19th August 2009, 15:11

Aww...! Take care man. Not sure if the ECU thingy can apply the brakes, keeping in mind u were thrown off to the bike's front. Was it like the front was on brakes- back lifted up n threw you off? Have the ECU checked for error codes anyways, and maybe reset it.

Technocrat · 19th August 2009, 15:36

Damn thats a bad one, I hope you are doing well now.

What Shan2nu has said makes sense if what you felt was a like sudden Jerk/jolt where in you got thrown off the seat as it was unexpected.

Else, I am not sure what can cause a brake to apply on its own.

xtreme power · 19th August 2009, 15:50

Quote:

Originally Posted by Jaggu

. , unless the brake fluid tube got twisted to apply pressure to the disc.

.

this is exactly what i thought might have gone wrong
never got to have a look at the bike since i was in too much of pain,
shall send the ecu for a complete check none the less

just want all possible reasons soughted out before i can ride her again

Rossiter · 19th August 2009, 16:39

Did you do any brake line replacement etc? If there is air in the hoses, funny (and painful) brake behaviour is to be expected.

Also have the master cylinder checked for any wear and tear or damage.

Jaggu · 19th August 2009, 18:19

Quote:

Originally Posted by xtreme power

this is exactly what i thought might have gone wrong
never got to have a look at the bike since i was in too much of pain,
shall send the ecu for a complete check none the less

just want all possible reasons soughted out before i can ride her again

Yup first the mechanicals then the ECU, very less chance its an engine cut off, you would have recognized it immediately.

Main thing right now recover well, and keep posting up on all the projects with you

YC.BALENO.CHD · 19th August 2009, 19:27

Thats a bad one . it sucks when you get throw off the bike for no fault of yours . Get well soon .

i think the ecu cutting off might result in a rear wheel lock up not the front . something might have gotten stuck in between your mudgaurd and wheel . get the front axle checked properly .

19th August 2009, 13:41	#1
xtreme power BHPian Join Date: Jul 2005 Location: mumbai Posts: 732 Thanked: 75 Times View My Garage	My busa is haunted...what could be wrong Was a normal tuesday Went a bit offroading then in a 350 bhp honda city dash later that night decided to take the busa for a spin. After coming back into the buildind was doing about 60kmph and suddenly the front brakes just locked and i got flung over the handle bars, right in front of the bike. And then suddenly as if the brake unlocking themself the bike picked up speed and squashed me between the its front end and my buildind compound wall. As a result suffered a hip dislocation and a badly bruised arms and feet. just wanted to know what could be the problem for this weird locking. Im 100% sure i did not have my hand anywhere close th the brake
	() Thanks

19th August 2009, 13:45	#2
musicmanaman BHPian Join Date: Nov 2006 Location: kolkata Posts: 927 Thanked: 25 Times	Hope you are fine, and the ingury is not serious. How can the busa act like that, the breaks cannot suddenly engage and then dis-engage, very very strange, unless as you mentioned the bike is really haunted. In any case get the front break tested.
	() Thanks

19th August 2009, 13:51	#3
bblost Team-BHP Support Join Date: Jul 2007 Location: Hyderabad Posts: 11,008 Thanked: 15,366 Times View My Garage	Is there anything stuck between the front wheel and the mud guard?
	() Thanks

19th August 2009, 14:00	#4
Shan2nu Senior - BHPian Join Date: Feb 2004 Location: Hubli - Karnata Posts: 5,533 Thanked: 125 Times View My Garage	It could have been the ECU. This happens on my car sometimes. Basically my O2 sensor is not working, so the ECU while making some adjustments makes the engine bog down and then suddenly increases revvs. On a car it just feels like a jerk but on a bike with close to 800-850bhp/ton, it could do some damage. Shan2nu
	() Thanks

19th August 2009, 14:04	#5
deky Senior - BHPian Join Date: Jul 2008 Location: Jaipur Posts: 1,194 Thanked: 1,247 Times	Good Lord, Hope you recovering well. Shan2nu, can it happen to any car or a bike? How do we ensure it doesnt happen??
	() Thanks

19th August 2009, 14:08	#6
JayPrashanth Senior - BHPian Join Date: Oct 2008 Location: Bangalore/Goa Posts: 1,302 Thanked: 2,074 Times	This looks like a major electronics screw up. Very scary. Hope you are recovering well Xtreme Power. Meanwhile, is your bike with the Suzuki A.S.S now? Cheers, Jay
	() Thanks

19th August 2009, 15:03	#8
fast_elegance BHPian Join Date: Jun 2009 Location: Mangalore/Bangalore Posts: 437 Thanked: 248 Times View My Garage	This is really scary. Brakes locking/unlocking on own . How can this be caused because of ECU? I guess the ECU only manages the way the engine responds. Correct me if i am wrong .
	() Thanks

19th August 2009, 15:09	#9
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,215 Thanked: 15,907 Times	Hope you are doing ok now! From the sound of it, your front wheels jammed up momentarily, if it was engine cut off such violent tossing wouldnt have happened, at the best rear wheel would have locked up and the bike would have skidded. If you have ruled out anything external jamming the wheel, like something get stuck between the tire and mudguard, you need to check the actual wheel assembly and brakes. Wheel bearings can seize up if they are conked and you had a nice blast before this. Brakes am still not sure since you mentioned keeping your hands off them, unless the brake fluid tube got twisted to apply pressure to the disc. Anyways wish you a speedy recovery and do a thorough build up of front end before anybody rides her.
	() Thanks

19th August 2009, 15:11	#10
ph03n!x Senior - BHPian Join Date: Jun 2008 Location: Coimbatore Posts: 2,566 Thanked: 5,963 Times	Aww...! Take care man. Not sure if the ECU thingy can apply the brakes, keeping in mind u were thrown off to the bike's front. Was it like the front was on brakes- back lifted up n threw you off? Have the ECU checked for error codes anyways, and maybe reset it.
	() Thanks

19th August 2009, 15:36	#11
Technocrat Senior - BHPian Join Date: Feb 2004 Location: GTA Posts: 14,813 Thanked: 2,700 Times	Damn thats a bad one, I hope you are doing well now. What Shan2nu has said makes sense if what you felt was a like sudden Jerk/jolt where in you got thrown off the seat as it was unexpected. Else, I am not sure what can cause a brake to apply on its own.
	() Thanks

19th August 2009, 16:39	#13
Rossiter BHPian Join Date: Apr 2009 Location: Bangalore Posts: 150 Thanked: 262 Times	Did you do any brake line replacement etc? If there is air in the hoses, funny (and painful) brake behaviour is to be expected. Also have the master cylinder checked for any wear and tear or damage.
	() Thanks

19th August 2009, 19:27	#15
YC.BALENO.CHD Senior - BHPian Join Date: Jan 2009 Location: Gurgaon Posts: 1,128 Thanked: 261 Times View My Garage	Thats a bad one . it sucks when you get throw off the bike for no fault of yours . Get well soon . i think the ecu cutting off might result in a rear wheel lock up not the front . something might have gotten stuck in between your mudgaurd and wheel . get the front axle checked properly .
	() Thanks