Bought second hand Ducati Monster S4, has passed MOT, but am noticing violent front end judder under heavy braking? What might be cause?
2007-04-21 05:00:01 · 13 answers · asked by Jimbo 2 in Cars & Transportation ➔ Motorcycles
Most likely cause is a warped disc or discs.
Blutac a lollipop stick to the forks so that one end is just clear of the side of the disc close to its outer edge, spin the wheel and look carefully at the end of the stick. Does the disc make irregular contact with the end of the lolly stick ? If so then the disc is warped, and will have to be replaced. Repeat on the other disc and check the result.
If discs check OK then check for wear in the steering head bearings by raising the wheel off the ground and pulling and pushing in the bottom of the forks. Any play should be adjusted out.Hope this helps.
PS Check the tyre for any unusual signs of wear or damage,especially deformed areas of tread and bulges. check it's properly seated on the rim and make sure the wheel is balanced. Check the rim for flatspots.
2007-04-22 06:20:58 · answer #1 · answered by Yoda 3 · 0⤊ 0⤋
You don't say if the judder is immediately on applying the brakes or if it is towards the end of a heavy braking time. If it is immediate then I would suspect (a) a warped disc, (b) knackered pads, (c) contaminated disc/pad surfaces. Even if the head bearings were shot then an even application of the brake would not cause judder, just a bit of instability on application. Being a second-hand bike I would replace the braking system (disc/pads) anyway. Better safe than sorry. If it is at the end of heavy braking sessions then I would suspect that the brake fluid is boiling behind the brake pistons. I had this problem with a fully service historied ZXR750. I replaced the brake fluid and the problem disappeared, and I had better brakes.
2007-04-21 08:17:40 · answer #2 · answered by ? 3 · 2⤊ 0⤋
notwithstanding that's feasible that's warped discs on front brakes (easy to have replaced) and this could? be the difficulty it could additionally be a worn ask your self absorber and or worn bearing joint. the two a kind of will and do decrease than braking start to coach as shuddering or vibrations by potential of steerage wheel ,foot pedal or perhaps by using physique of motor vehicle if undesirable adequate. have not got discs skimmed, fake financial equipment and decreases secure practices margin . in case you do get new discs do have new pads geared up at comparable time. that's taken as grante dthat oyu have checked wheels for stability and tyres are actually not a difficulty? attempt swapping decrease back with front for an easy verify in the previous laying out any money.
2016-10-13 02:56:46 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Sounds like the break disc or discs are warped.
Can happen through over heating.
If changing the disc change the pads too. On both sides.
2007-04-21 05:03:33 · answer #4 · answered by Anonymous · 2⤊ 0⤋
Warped front brake disc.
2007-04-21 05:02:45 · answer #5 · answered by Mr. KnowItAll 7 · 3⤊ 0⤋
Warped brake rotor.
2007-04-21 08:16:44 · answer #6 · answered by thomy8s 4 · 0⤊ 0⤋
At best a warped disk or naff pads. At worst naff steering head bearings.
2007-04-21 05:05:26 · answer #7 · answered by Del Piero 10 7 · 3⤊ 0⤋
This is almost definitely from a loose or worn steering stem bearing. I may need to be replaced or just re-greased and re-torqued
2007-04-21 07:27:55 · answer #8 · answered by engine guy 1 · 1⤊ 0⤋
It could be front wheel bearings or steering head bearings. You could also check that there is oil in the forks.
2007-04-21 07:34:57 · answer #9 · answered by Hellie12 2 · 1⤊ 0⤋
Take note of what popeye the sailorman has to say. I've had the same problem.
Olive Oyl
2007-04-22 08:38:17 · answer #10 · answered by henwilv 3 · 0⤊ 0⤋