Front brake failure

Steven31371 · Jan 5, 2023

Taz said:
I have a few questions regarding the swingarm cover you’re using so I sent you a pm. Would really appreciate your feedback.

I saw that too lol

Taz · Jan 5, 2023

Steven31371 said:
I saw that too lol

If you’re referring to the tape or whatever that was on there, that’s not what I was inquiring about

SuperDomestique · Jan 5, 2023

A trip through the grass will easily bottom out the fork.

Rider sag is a little off. Optimal rider sag is allegedly 42 mm for 125 mm travel forks on V4 per Ohlins and other reputable suspension experts.

If I were in your shoes, I’d run new lines from ABS pump directly to the calipers to avoid the cross over line.

stevem · Jan 5, 2023

Steven31371 said:
He had a marker on the fork, it had bottomed out.

Stevem did you see any signs of oil leakage from the shock?

It may be that in the heat of the moment you had a harder hit on the front end than you realized, or the oil level isn’t right…or the cart and/or cart springs are somehow not set up right internally.

If the right amount of oil is in there it would be REALLY hard to bottom out that shock like that.

I’d pull those carts out and maybe have a second set of eyes on giving those front fork setups a good looking over.

It happened on the second lap of the first session of the day. The carts had done one day previously and had been installed by a reputable guy with no signs of leakage. After the mishap there was fluid around the bottom of the fork that appeared to be brake fluid to the sight and touch. Like you say for peace of mind and moving forward I will take the forks out and take them to be inspected by him and I.I am an A grade rider and have been racing since the late 80's, I am confident there was no other moment other than running off onto the grass. My first thought when the lever came into the bar was I haven't had a tanky ( which can flex the disc's and push the pads back ) so I pumped the brakes 3 times and still no lever. Would a broken spring do this ?

RickD996 · Jan 5, 2023

stevem said:
It happened on the second lap of the first session of the day. The carts had done one day previously and had been installed by a reputable guy with no signs of leakage. After the mishap there was fluid around the bottom of the fork that appeared to be brake fluid to the sight and touch. Like you say for peace of mind and moving forward I will take the forks out and take them to be inspected by him and I.I am an A grade rider and have been racing since the late 80's, I am confident there was no other moment other than running off onto the grass. My first thought when the lever came into the bar was I haven't had a tanky ( which can flex the disc's and push the pads back ) so I pumped the brakes 3 times and still no lever. Would a broken spring do this

I think, somehow the forks haven't been reinstalled correctly, and a brake line has ended up in the wrong place, worn through against the tyre, leaked brake fluid, causing your off and no pressure at the lever.

craig bush · Jan 5, 2023

RickD996 said:
I think, somehow the forks haven't been reinstalled correctly, and a brake line has ended up in the wrong place, worn through against the tyre, leaked brake fluid, causing your off and no pressure at the lever.

Damn. That’s a sketchy situation.

stevem · Jan 5, 2023

RickD996 said:
I think, somehow the forks haven't been reinstalled correctly, and a brake line has ended up in the wrong place, worn through against the tyre, leaked brake fluid, causing your off and no pressure at the lever.

Agreed Rick , I did not mount the lines properly around the mudguard . That is totally my fault . Externally the forks are right , I will take them out and check the action on them up and down then have then pulled apart to check inside .

Front brake failure

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