2018 Goldwing DCT Tour Brake Issue


Information and questions on GL1800 Goldwings (2018+)
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tirvin100
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2018 Goldwing DCT Tour Brake Issue

Post by tirvin100 » Thu Sep 12, 2019 2:37 pm



I put the centramatic balancers on my new Goldwing DCT Tour. I had to remove the calipers and wheel in order to do so. After I reinstalled everything now my brakes are acting weird. I have pressure when I am at the stopped position. But as soon as I take off and need to stop, the brake lever damn near bottoms out before the bike stops. I blead the brakes using the sequence according to the service manual top left, top right both with front brake lever. Bottom left and bottom right with foot lever, then the rear caliper with foot lever. No air that I can see in the clear plastic tubing.



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Re: 2018 Goldwing DCT Tour Brake Issue

Post by WingAdmin » Thu Sep 12, 2019 3:13 pm

tirvin100 wrote:
Thu Sep 12, 2019 2:37 pm
I put the centramatic balancers on my new Goldwing DCT Tour. I had to remove the calipers and wheel in order to do so. After I reinstalled everything now my brakes are acting weird. I have pressure when I am at the stopped position. But as soon as I take off and need to stop, the brake lever damn near bottoms out before the bike stops. I blead the brakes using the sequence according to the service manual top left, top right both with front brake lever. Bottom left and bottom right with foot lever, then the rear caliper with foot lever. No air that I can see in the clear plastic tubing.
When the brake lever almost bottoms out, can you pump it a couple times and immediately get normal function from it again?

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tirvin100
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Re: 2018 Goldwing DCT Tour Brake Issue

Post by tirvin100 » Thu Sep 12, 2019 4:17 pm

Yes. But as soon as the bike moves forward it bottoms out again

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Re: 2018 Goldwing DCT Tour Brake Issue

Post by WingAdmin » Thu Sep 12, 2019 4:53 pm

tirvin100 wrote:
Thu Sep 12, 2019 4:17 pm
Yes. But as soon as the bike moves forward it bottoms out again
OK, so it sounds like whatever is causing this problem is forcing the pistons to retract more than they should. Anything that moves the caliper laterally on its slides will cause this to happen. I would have a very careful look at the Centramatic balancers and make sure they are not contacting the calipers in any way. Lift the front wheel, pump and squeeze the brakes on until they are tight, then spin the wheel and look very closely - the calipers should not be moving when you do this. If you see a caliper moving (will probably be within the first revolution of the wheel) then you've got an issue.

Also check out the disc rotor runout - excessive runout will cause piston over-retraction, with the same result. However, the fact that this started with the installation of the Centramatics points the finger at them.



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