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Post by katt on Jul 30, 2018 21:32:18 GMT -5
If you followed my thread about tire selection here is the link, upgraded to Continental Zippy 1 tires few days ago and don't understand what happened, brakes totally trashed, they were perfectly normal when i was driving into tire shop where i personally disconnected and reinstalled front and rear rim, i did not touch caliper, just slide out and back it, only difference is tire.
Have are my clues: - too much pressure in lug nut
- Tires are skidding (without making noise) perhaps they are covered by some protective compound to prevent dry root when damage in storage that needs to wear off or be removed as it saying in 2nd last paragraph here- Grease on the brake disk or pads or the soapy water tire shop used had some oil in it and i simply wiped it down with dirty also somewhat oily rag they gave me
Whats just buying break cleaner and spraying hell out of caliper and brake disk can help?
I currently have them at 28psi front and back, tires are kind of hard, on tires it reads max 45 psi.
Currently i got burned on the sun and hardly capable of checking, at this point id like to know what you think about this problem?
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Post by humanshield on Jul 30, 2018 22:32:54 GMT -5
New tires are inherently less grippy. when I put new tires on my sportbikes I have to be really careful the first hundred miles or so. If you lost pressure at the hand grabs, that would probably be a problem where the pistons in the calipers came out too far or were disturbed in such a way that they aren't moving properly now or air got in the system. There could have been rust in the calipers. If it's been more than two years since you flushed the brake system, it's time. Grease or oil could have gotten on the rotors then been transferred to the discs. You can clean then with a solvent such as brake cleaning fluid.
What exactly do you mean by "too much pressure in lug nut"? Are you talking about the axel nut?
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Post by katt on Jul 30, 2018 23:57:26 GMT -5
New tires are inherently less grippy. when I put new tires on my sportbikes I have to be really careful the first hundred miles or so. If you lost pressure at the hand grabs, that would probably be a problem where the pistons in the calipers came out too far or were disturbed in such a way that they aren't moving properly now or air got in the system. There could have been rust in the calipers. If it's been more than two years since you flushed the brake system, it's time. Grease or oil could have gotten on the rotors then been transferred to the discs. You can clean then with a solvent such as brake cleaning fluid.
What exactly do you mean by "too much pressure in lug nut"? Are you talking about the axel nut?
Yeas meant axel nut.
I just rebuild front caliper and bleed brakes not so long ago, so system is good. Currently though it does not lock wheels at all, now i am pretty certain its grease and will clean.
As for tires being less drippy do they skid when braking or whats the physics behind it.
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Post by tocoo on Jul 31, 2018 3:06:16 GMT -5
If it's been more than two years since you flushed the brake system, it's time. I have not changed the braking fluid in 4 years, since the purchase of the scooter. Is it important to flush it when the brakes work fine over so many years ? |
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Post by ThaiGyro on Jul 31, 2018 4:46:53 GMT -5
New tires are completely covered with "mold release" compounds...meaning some kind of hydrocarbon fluid, like oil!
Even with a verbal warning, I nearly crashed my Ducati a number of years ago after mounting new rubber. Felt good, went too fast and they did not clean the mold release off.
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Post by humanshield on Jul 31, 2018 7:46:03 GMT -5
New tires are completely covered with "mold release" compounds...meaning some kind of hydrocarbon fluid, like oil! Even with a verbal warning, I nearly crashed my Ducati a number of years ago after mounting new rubber. Felt good, went too fast and they did not clean the mold release off. Yes, the brake fluid is a desiccant and will absorb moisture from the air. Change it. If you don't, it becomes corrosive and will damage the insides of the master cylinder and calipers. And also rubber brake hoses.
I would say every two years on a motorcycle or scooter. Few people ever do it.
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Post by tocoo on Jul 31, 2018 12:30:10 GMT -5
I found a tutorial here www.youtube.com/watch?v=iy3M5OKrZqI for changing the braking fluid. I did not found one from www.youtube.com/user/90gtvert/search?query=fluidI do not understand why he closes the 8mm nut each time. Can most the fluid be flushed by gravity and pushing on the brake lever, and filling the top with new fluid [easy when 2 people work on it], until most of the old fluid is out, then going slow like him to avoid air bubble. |
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Post by katt on Jul 31, 2018 14:23:17 GMT -5
New tires are completely covered with "mold release" compounds...meaning some kind of hydrocarbon fluid, like oil! Even with a verbal warning, I nearly crashed my Ducati a number of years ago after mounting new rubber. Felt good, went too fast and they did not clean the mold release off. How do i clean it off? |
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Post by edwardtennant on Jul 31, 2018 16:02:45 GMT -5
New tires are completely covered with "mold release" compounds...meaning some kind of hydrocarbon fluid, like oil! Even with a verbal warning, I nearly crashed my Ducati a number of years ago after mounting new rubber. Felt good, went too fast and they did not clean the mold release off. How do i clean it off? Just by driving it, but being careful on corners |
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Post by ThaiGyro on Jul 31, 2018 19:14:28 GMT -5
You can clean it...Simple green and water, just like you would clean a floor. Scrub good with nylon brush and rinse! The tire shops will tell you just to drive carefully, but it collects in the grooves more and comes out slowly, so better to wash.
Good tire shops do this for you! If you buy online, do it before driving.
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Post by katt on Jul 31, 2018 22:13:35 GMT -5
How about using car wash that has green fluid for rims, this might be like simple green then pressure wash i dont want to scrub right now because my hand hurts still. Anyway update i have used a brake cleaner took out wheel and washed brake pads and rotor and it brakes good now up to locking the wheel, have not done rear drum yet.
I also applied grease under the shock dust cover in order to prevent shocks locking.
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