Strong vibration in the front when brakes are applied...help

[Davin]

Hi all,

 

I had been experiencing this very strong vibration/chopping in the front when braking is applied...be it hard or soft braking this problem comes as it likes...and it happened on my previous track session and caused me to enter the gravel...

 

Because of this problem this is what had been done so far...

1) Suspect brake disc warpped - Changed to Braking Fully floating disc

2) Suspect brake pad - Changed new Braking brake pads

 

Does anyone felt this or experienced this before?

Could experienced riders kindly share some advise?

[SNapEl]

Steering Cone Bearings

Front Suspension

Front and rear wheel alignment.

[rezz_shaz]

cone bearing problem, either wear off or not tightened properly....

[Davin]

What are the main syntoms or signs that the bearings or steering cone are not good anymore...

[Sn0w_MaN]

personally i guess it is Steering Cone Bearings, i got that from my rvf before.

Of cause cant compare to ur 1000cc bike but this might be the problem...

[superspeed123]

Have you checke the both front brake calipers too?? if the front brake pistons never release properly will cause too much heat to the brake disc and the brake disc will warp. service the front brake caliper if require. cheers

[superspeed123]

steering cone if spoil, when u ride the bike u will feel the bike want to fall when you corning. best way to check to jack up your bike and check the steering cone. slowly turn the handle bar to the left and to the right again and repeat if necessary to confirm. u will feel the steering cone not smooth when u turn the handle bar.

[DemonicSaint]

check ur wheel bearings as well

[hepcobecker]

i think it might be the con bearing bro . got this similar situation before.

[Davin]

So far I got my mechanic to test ride...he did a series of very hard braking but just couldn't replicate the problem...but he is sure that the cone is good...

 

So now I`m left with the wheel bearings unchecked...my other suspect is heat...

 

There was once I came from Serangoon rd to ubi on a very hot day...and when I was at the junction outside geylang police station preparing to stop traffic light...my front started to vibrate/chop very violently...I released the brakes and things went back to normal I brake again it comes again and I had a very hard time to stop in time even I was just at 60km/h...

 

So now we are left with no choice and clueless when we cannot replicate the problem...my mechanic will try it out on the track next week and see what happens...

[Davin]

Is there anymore ideas from fellow experienced riders here of what might be the cause other than the above mentioned......

[YEN96]

is it like a "vibrator feeling" on the handle bars when u brake ??

After u changed brake disc and pads still got this problem ??

This problem occur when the disc/pads are hot only ??

If i not wrong, u will also feel the vibration at high speeds.

Ask ah Tak to try ur bike on NSH while on supper, no need to go track.

High speeds - U shld get same vibration and can feel the brake pads/disc not biting, lose braking power

[Forestfly]

I've came across this problem. Old/worn out brake disc can cause vibration too, especially when the disc is being heated up. (long ride)

check if the screws of the disc are tighten.

 

I solved the vibrations when I change the brake disc.

[Davin]

My brake discs are new...

 

I just my re-setup my suspensions today...hope the new setup will reduce the chances of the problem coming back...gonna replace my calipers too...lets see what happens next...

[fmaorui]

your bike is beautiful

[Ah_Pet]

TS really spending alot on that problem itself.

 

ups for u

[eRr0r]

i got the same problem too with my x1r. did a ebrake at around 100km/hr and the front vibrate quite badly. im not sure if thats a vibration or the front wheel skidded as it happen too sudden.

 

any idea what cause it to happen? anyway my bike is only less than 1yr old. any chances of my steering cone spoil ?

[ahweng86]

are u sayin when u stationary den press brake , u will feel vibration???

 

i got this problem but braking all this ok lehz. i am riding fz1s

[Pandoras Kitten 3]

I'm kind of doing some speculation here but what if the 2 forks were not evenly balanced, ie, the kind of thing that happens if one seal were leaking, not equally filled or if one of the two forks had a bad spring.

 

Will the unbalanced damping then cause a small rotational force that vibrates the wheel as it counterbalances itself (spinning wheel is a gyro that resists change of direction)?