First off, let me acknowledge that the technique preferred for dealing with a particular type of riding situation is totally up to the individual to decide (i.e. "whatever works for you is cool").
With that said, my opinion (provided in the response below to the OP's question) on what has proven to work for me ...... for handling this type of turn when riding in the rain ..... may not align with everyone's preference.
In weighing of the opinion however, I will mention that the rain riding learning that it springs from comes from likely 50K+ miles of worst-case wet weather riding, on a wide range of road conditions, and a variety of different size/type of motorcycles. Some of those wet weather testing miles at a pace (on the track) that would be surprising to many.
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During low speed turn I don't hang off I normally try and steer the bike under me, but what I want to know is during the rain is this still the best way to handle low speed turns?
The technique you describe Matt, of not getting off the bike at all, and therefore pushing the bike under you (i.e. leaning it an exaggerated amount), is
180 degrees opposite of what I would recommend to you .... for navigating low-speed/tight turns, in wet weather conditions .... on a sportbike (light weight dirtbikes, or Motards, have more options).
There are a few turns of this exact nature on the local twisty backroad route in the Santa Cruz mountains, that our group frequents on weekend adventures. One in particular is about 1/2 way down Felton Empire Rd, coming down from Empire Grade, and heading back to Hwy 9. It's a very tight, low-speed (10MPH?) downhill, righthand turn.
The technique I personally use is to get my body positioned off the bike to the inside early at the turn approach, to an exaggerated (for the speed) amount. I then very consciously try to keep the bike as near to vertical as possible, from entrance, to apex, to exit. Generally the target line that I'm trying to get the bike to take is a very SMOOTH one ... one which minimizes the amount of side force the contact patch of the front tire is dealing with, at every millisecond interval.
I try to think of the handlebars as if they were attached to a tricycle, where for a righthand turn you actually rotate the bars on their pivot a very subtle (small) amount in a clockwise (right) direction ... to encourage the front tire to take the path you want it to track through the turn.
I keep my elbows up more than normal, and try to have my shoulders kind of squared-off with the handlebars. It becomes a situation where my entire shoulder/arm/chest combination is acting more as a single entity, that is facilitating the subtle steering of the front wheel.
It feels pretty weird at first. The reason being it does require a lot of conscious off-bike body positioning, and an action of almost pushing the bike away from you (straightening out your outside arm's elbow) to keep it close to being nearly straight upright. If the bike is allowed to lean very far over at any point, the steering action described above (subtlely easing the steering to rotate the front wheel in the direction of the turn) will not work .... and the whole process is lost.
It takes practice, feels very contrary to normal counter-steering cornering techniques. It's also something that ONLY works in very low speed (10MPH or less? .. as a guesstimate), tight radius turns ... and has the most value/importance when navigating such turns in the rain (as was your [OP] question).
Presented as a technique for those that may wish to test a different approach to dealing with such specialized riding challenges, than what they may have been using previously. If it works ...... cool .... go with it. If not, and something else works better ...... stick to it too.
Hope this gives you something to consider Matt, in response to your posted question on rain riding in those specialized conditions.
