Severe judder on braking
I drive a Marlin Sportster, which I've had for a little over a year. I've had a recurrent problem with a very severe vibration when I brake. Only at 50mph - no problems at lower speeds or above 60. The thought of keeping my speed below 50mph does not appeal, so I have to cure this.
I changed the front disks last year and that seemed to cure it for a while. The front RH disk was a little out of true, although not much. Then more recently it recurred on the LH side, so changed that disk and again cured the problem. Now it's back again. On the RH side I think. The disk is true. I've checked the suspension strut and joints - all fine. I dismantled the caliper, which seems fine, all 4 pistons move. Everything seems tight, including wheel bearings. Am running out of ideas.
My sportster has Cortina uprights & hubs, Capri ventilated disks and Princess calipers. All have seen little service, the car having done 7000 miles on new equipment.
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