All your hard braking should be upright of course as you know. I have no experience with track ABS, but more in a street application. I think the day should be spent as the last one out when called. This is more you find the straights so no one is behind you, no one will be in the way by the time you catch up and just slam the front brake on alone. If the front end starts to slide, quick let go of the lever.
So this is now a conditioning you need to train yourself for. How much braking can I do before the front end slides at 'high speed' remember. I'm over 100mph and I want to hear the front tire chirp on and off, watch the bars move to either side, the front drops, you release the brake lever it's as fast as lightening. It's the safer/higher speed you are attempting to stay in. You may blowout a set of fork seals and lose about 9 mph you chop it there @ 100mph and slam on the fronts.
You are always looking where you are going, mind on that lever about to be released. It's just that the bar moves sideways, the front drops, I can't tell you how fast that happens with non-ABS you are seeing that out of the corner of your eye, then the lever is released and you let the front end snap back to center with such a soft grasp between the hands and bars.
I doubt that will happen with a rolling wheel under ABS input. As long as that wheel moves under you, no skidding, no bar lock, no frame drop, etc. So the deal is this. I like snapping the brake at the last moment so I now hear my front end knock and it has the familiar tick to it.
You said the bike is broken in and I think the first 600 miles call for a test at the neck for the loose front end? If that 100+ hammer on the lever to the grip is too extreme, try a slow snap of the brake and hear for the front end to tick. Then, you sort of sneak up on the ABS by doing that.
Yes, quite intimidating snapping it to the grip and wait (things happen quick). I could not spit out a single syllable word fast enough are the reflexes under that condition. Now, straight up and down I practice a rear wheel skid no front brake?
I could see the threshold of the ABS this way. Once I stab it hard and set the ABS rat-tat-tatting, I can get a clue what the front will feel like. As long as it rolls you are in control front or rear.
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