Check some of your car figures, they aren't consistent with my test data. We're pulling up to 1.08 G's in the Mazda 3 on street tyres on NZ coarse chip roads, hardly 'the best' production car. I've got data for many common new cars since 2004, on different surfaces, different weather, etc...Even cars with crap ABS are pulling up in more than .8G. The worst braking we've recorded was still peaking at .67G (before lockup), that was an old Supra.
In distance terms, most new cars are stopping from 100km/h in around 130-140 feet. The best we're getting is in the low 100's (usually Mazdas again), but we haven't tested a 'proper' sports car yet.
i only do it when im sitting on a slight incline...where theres a chance of my rolling backwards. tried the brakes, but prefer both feet on the ground, and hand ready to accelerate when needed. tried using my legs, but the lights take too long lol. clutch is only out a little, just enough to engage the engine, and i have the throttle enough to match. hard to explain, lol.
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I understand where you are coming from, it is actually a common practice, even with car drivers.
Where the clutch lever is fully out or fully in there should be no clutch wear and no heat generated (from the clutch). Where the clutch is slipping it is both wearing and generating heat due to friction.
A wet clutch, as found on most modern motorcycles runs in a bath of oil which reduces both friction and heat, up to a point. They (wet clutches) are better able to handle slipping, which is a nesessary function for a smooth take off and on some bikes it is necessary to feather (slip) the clutch for control at low speeds (U turns etc).
If the clutch is not getting too hot you should be ok.
Better practice I find is the put your left foot down and use the right foot on the rear brake. When you go to take off just release the clutch as normal and drop the rear brake as you just start to move.
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