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Jenko
90cc 2 stroke / 110 4 stroke
Joined: 16 Nov 2008
Posts: 59
Location: Lucindale
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 Posted: Sun Nov 23, 2008 6:05 pm Post subject: Sticking Brake Callipers |
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One of my front brake callipers on my predator doesn't release fully I have cleaned the piston but it still sticks slightly. I was wondering if anyone had any advice how to stop them from sticking. Cheers
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hustleratv.com.au
The Day Starts With OZATV !
Joined: 26 Jan 2007
Posts: 1022
Location: Adelaide
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| Posted: Sun Nov 23, 2008 9:17 pm Post subject: hi |
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I think you will find all predator's do this,unless you have bent your stub axle.
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The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Sun Nov 23, 2008 10:07 pm Post subject: |
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I don't have any evperience in particular with the Predator brakes but usually if everything is clean the pistons should release and retract properly.
A few thou of wheel bearing play or disc run out will help knock the pads back.
Out of interest, see if the side that does not stick has a bit more run out.
If your pads are worn wedge shaped they could self engage a bit too.
If the pads are still pretty good try just swapping them side to side.
So the taper goes the other way.
Unless anyone has specific advise... I hope that helps.
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Raptor700
50cc nipper
Joined: 14 Sep 2008
Posts: 31
Location: perth
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| Posted: Mon Nov 24, 2008 6:29 pm Post subject: |
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Pull your caliper off and disassemble. It could possibly be one of the pistons undersize and sticking. You will see excessive scoring if they are sticking. Check your brake lines as well as it could of copped a rock and it is blocked not releasing the pressure quick enough.
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Yamaha Raptor 50CC
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Predatory
4fiddy Racer
Joined: 01 Aug 2007
Posts: 222
Location: Perth
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| Posted: Thu Nov 27, 2008 4:24 pm Post subject: Predator Brakes |
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It is a design fault with the Predator and has given many a Predator owner gray hairs. You have to remove the rods that the pads hang on and polish them up really well. The pad actually wears a groove into the rod and you find that the pad does not retreat into the relaxed position and just keeps scraping away on the disk. There is apparently a conversion that has been done using Honda parts and info regarding this can be found on the Predator Owners website. You can also fit a light spring between the two pads( on the rod ) which will force the pads apart, but you will have to find just the right spring, otherwise it could become to hard to pull front brakes. It is common practice to fit iether a Yamaha or Honda Master cylinder to the Predator as well
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Jenko
90cc 2 stroke / 110 4 stroke
Joined: 16 Nov 2008
Posts: 59
Location: Lucindale
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| Posted: Thu Nov 27, 2008 7:09 pm Post subject: |
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Thanks Predatory for the advice, I'll polish up the rods and see if that helps. I,ll also see if I can find a suitable spring in the workshop, worst case scenario I might have to get new callipers. Will let u know how I get on. Cheers
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Jenko
90cc 2 stroke / 110 4 stroke
Joined: 16 Nov 2008
Posts: 59
Location: Lucindale
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| Posted: Mon Dec 01, 2008 6:05 pm Post subject: |
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Cleaned the rods up but didnt make alot of difference, found some springs in the workshop that fitted had to shorten them to the right length but they work a treat. Thanks for all the advice
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