Front hydraulic disk brake problem... By adamhoyer (Read 1,710 times)

[adamhoyer]

Okay sorry to post so many times but i'm still having a problem. I sprayed brake cleaner on my pads and the rotor and it stopped the problem, then it seems like it wore off and it now wobbles.... Changed the pads and disc brake. Trying to figure out the problem if the caliper piston could stick, I think there is two pistons on my caliper if I see two round spots where the pads are against.  Wonder how I can fix this?

[Bashan]

Have you had the rotor off yet? If not it's time to. Pull the wheel, if you need pix look up my Bashan 150 modification thread in Customs. Get the rotor off the wheel. Lay the rotor on a flat surface and if it's bent get a new one. If it's flat, we need to take the caliper apart. Are you posting too much? I guess you weren't around when I got on Scoot Dawg back in 2009. THAT was too much. I remember a Christmas Eve when I was bored waiting for family to come over and nothing was happening on Dawg. I went down the main page and commented on EVERYTHING until Big Guy came on and said are u doing? Just making convo Big Fella. Pretty soon I irritated enough people that they woke up and started posting. Then the family showed up and I bailed on the Dawg for the day. HAR! No Adam, you don't post too much pal, knock it out. Rich

[adamhoyer]

They bend in less then two weeks?

[Bashan]

Yes they can. You could just take the wheel off and lay the rotor flat but it's a lot easier to do with the rotor off. I've never had a problem getting the Allens out but some guys have. So if it looks like it's going to be problematic just lay the whole thing on a table. If you don't want to do any of that you can try and get a reference point by getting something steady up against the rotor and spinning the wheel. I've been through this and I'm telling you the best way to start ruling things in or out. Now it's your bike and you can of course do what you want.

[adamhoyer]

I will take the rotor off later today, as of right now its only 1:14pm

[adamhoyer]

Looks like the rotor is bent already.

[Guitarman]

You probably got hit by something going down the road. It happens. Part of the hazards of riding on 2 wheels instead of inside 4.

[adamhoyer]

My mountain bike rotors bent in like 2 days before too. Depends on the persons life force how much he has I suspect that preserves the integrity of his items.

[Bashan]

Space-eee Adam.....Space-eeeeeee! I like it. I have to believe that a large part of it is the materials. The reason I say that is I had to do a couple panic stops on my Bashan and the rotor warped. Now my CF Motos have never had a problem with warped rotors even though I've had to put the clamps on many times. The rotors are not only thicker but you can tell the metal is denser. Shoot, my SUV rotors warped from going up and down Oak Mountain all the time. I had them turned twice and the last time the mechanic said "if I do it again you'll be able to hold them up to the light and see through them." I've left them wobbly since. Rich

[adamhoyer]

Okay, replaced my rotor and my bike is still pulling to the right when I brake. P.S. Sorry for bringing an old thread back up.

[Bashan]

Not a problem, don't worry about posting. Loosen the caliper bolts, have somebody squeeze the brake lever, and tighten them. See what that does.

[adamhoyer]

okay will try it

[adamhoyer]

What if I bled my brakes wrong?

[rks]

"Speed bleeders" make bleeding, (or even changing your fluid completely), a breeze. Easily found doing a search, available at any auto parts, uncommon sizes may have to be ordered. My China scoot takes a m8x1.25 bleeder, yours may be different.

Now, I need to vent....

I will never understand the need for disc brakes on two wheelers, and especially on scooters. I miss the days of mechanical, drum brakes...with an occasional adjustment, they would run trouble free until the linings were worn off the shoes.

Modern technology has given us rotors that warp for no apparent reason, calipers exposed to the elements, lifetime pads that gouge up the rotors, and a host of other annoyances like squeaking, rattling, etc.

They are a real pain in the rear, and certainly not needed to stop a 250 to 300 pound scooter.

[cyborg]

i prefer disc brakes,,,superior braking by a long shot,,,,i agree with you on the low speed 50cc and mopeds and the like but any decent scooter that can do 60-70+ mph i'll keep my disc ,,,and mine warped in the first 100 miles,,,put an EBC on it,,,,end of story