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Re: Front Brake Disk problem !
I can eard a metallic noise from the front wheel. Since 2 weeks I'm looking to find where he can come from and now I think I've found and I'm a little bit frightened.
This noise is comming from the front break disk they are moving in the screw place. See the picture
Have you ever see this problem ? Is it Normal ?,I think it's normal mate. Semi floating or floating discs are fitted so they do move. Someone more knowledgeable will be along soon I'm sure to confirm or correct me!,,,
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Hi there, does it do it on a good road? If not then I wouldn't get too concerned, it is a front wheel drive I presume and any front wheel drive car will follow any imperfections in the road and track the road imperfection, is it like the steering has a mind of its own and wants to follow the road surface, if so then this is normal, if not please take it to your mechanical shop and have them look at it
Use loctite on the threads of all parts. For the front, holding the axle with a tool in the hole, tighten the axle nut to 50 lbs.
If your bike has dual front disk brakes, you need to insert a 7/16 drill bit into the hole in the axle. This step is necessary to give the proper spacing to the brake discs. Loosen the pinch bolt at the bottom of the fork. Move the fork so the drill bit rests snugly against the side of the fork. Now tighten the pinch bolt making certain the drill bit still contacts the side of the fork.The pinch bolt should get not more than 30lbs.
for the rear, the axle gets 60 lbs. If you loosened the shocks to make room for the wheel tighten those bolts to 35lbs.
I sure hope you kept all the spacers and washers in their correct positions.
The first thing tp try is a simple pressure wash of the calipers just in case a little dirt is the cause. Wheel lock up surprisingly is normally caused by dirt in the master cylinder. There is a large hole in the master cylinder that feeds the brake piston in the master cylinder. Right next to large feeder hole, is a pin hole that is the brake fluid return passageway. If the pin hole becomes plugged with dirt or rust the front wheel will drag or even lock up. A simple cleaning of the master cylinder will often fix the lock up problem. If the machine is older consider replacing all of the rubber parts and refilling the system with fresh DOT 3/4 brake fluid.
Vibration from about 40-60 mph is usually attributed to wheel balancing, but the onset when you hit a bump seems to indicate play in the steering linkages (tie rods etc) or suspension members and stabiliser bar rubbers but you had that all checked out, that brings us back to the wheel balancing.
I would check the upper & lower balljoints & control arm bushings. If it has torsion bars in the suspension that could be the culprit as well. Poke a small hole in the ball joint boots & spary wd40 in there & see if the sound gets better or goes away.
Don't disconnect any brake line from caliper!
Don't disconnect any ABS sensor!
For change front brake pads you must raise vehicle, remove wheels, extract the retaining spring of the caliper, and remove the caliper as follow:
1. Do not disconnect the brake hose from the caliper, and do not allow the caliper to hang by the brake hose!
2. Remove top and bottom caps (on back side of the caliper) for access to guide pins, then unbolt and remove them from the brake carrier. Remove the caliper.
3. Now you must thoroughly clean the brake calipers (free of grease).
4. Remove outer brake pad from brake carrier.
5. Pull inner brake pad out of brake caliper piston.
6. Remove brake carrier from wheel bearing housing (two ribbed bolts). 125 Nm
7. Remove brake disc from wheel hub.
8. Install brake carrier on wheel bearing housing. Tightening torque for two ribbed bolts = 125 Nm.
9. Check up the brake fluid level on the reservor, and emptying if neccessary!
10. Push piston back into brake caliper housing.
11. Install inner brake pad (with expanding spring) in brake caliper piston. (Arrow marked on pad - if exist, must point in direction of brake disc rotation when vehicle is moving forward).
12. Install outer brake pad into brake carrier.
13. Bolt brake caliper housing to brake carrier using two guide pins. Tightening torque is 25 Nm.
14. Install both caps.
15. Insert retaining spring into brake caliper housing. Important: Depress the brake pedal firmly several times while the car is stationary so that the brake pads adjust to their normal operating positions!!! Check brake fluid level and top up if neccessary!!! Please Rate my Response! Thanks!
but I mention Aprilia and they run for the hills. Seems like most people only want to work on Hondas and Harley's.
Does anyone think that this is a project that I should try myself?
Or is there anyone out there that knows of someone that could do a perfect job?I just got through dealing with the same problem. I even got a new wheel and it wasnt' true. The dealer couldn't true it because the wheel is too rigid. I found one of the best businesses I have ever come across during my search to get the wheel fixed. The company is Woody's Wheel Works in Colorado. I shipped them my wheel they trued it the day I got it and shipped it back out the next day. They are a great bunch of guys. The site is www.woodyswheelworks.com.