Opinions regarding the Motorcycle Move ¶
By: John A on Dec. 5, 2020, 8:44 a.m.
I think that you have got many facts wrong regarding your Motorcycle Move opinions.
You seemingly believe that when a lead wrist flexion-graph shows a motion towards decreasing lead wrist extension (and in the direction of lead wrist flexion) during the early-mid downswing - as seen in your transition style graph - that the golfer must be applying the motorcycle move. So, in you video labelled "Flexing your Wrist - Golf Club Face Motorcycle Move" you incorrectly label Henrik Stenson as using the motorcycle move between P4 => P6 because his lead wrist is less extended at P6 than it was at P4. However, Henrik's clubface does not close relative to his clubhead arc (or relative to the watchface area of his lead lower forearm) between P4 => P6 even though his lead wrist is becoming less extended - because he is using the intact LFFW/GFLW golf swing technique as described in the following review paper at https://perfectgolfswingreview.net/LeadWristBowing.html .
The key point that you do not seemingly understand is the fact that the lead wrist will become more extended if the golfer uses an intact LFFW/GFLW golf swing technique as it becomes more radially deviated, and that it will become less extended as it becomes more ulnar deviated. Here is the image - https://perfectgolfswingreview.net/Author-BowingTwelve.jpg - showing that fact where the clubshaft remains straight-line-aligned with the lead arm and where the clubface does not close - as the author moves his lead wrist in the direction of either radial deviation, or ulnar deviation, while maintaining a GFLW (even though the degree of lead wrist dorsiflexion changes to a marked degree).
You also incorrectly claim that it is possible to perform the motorcycle move to close the clubface relative to the clubhead arc after P6 and you use Rory Sabbatinni as an example. However, in that review paper, the author shows that lead wrist bowing after P6 (when the lead wrist becomes ulnar deviated) causes clubshaft angulation without any clubface closing. That means that bowing the lead wrist between P6 => P7 will cause forward shaft lean, but it will not close the clubface relative to the clubhead arc. In fact, the increased degree of forward shaft lean at impact (secondary to lead wrist bowing happening in the later downswing when the lead wrist increasingly ulnar-deviates) opens the clubface relative to the ball-target line and the golfer will need more (not less) lead forearm supination to get the clubface square by impact.
You also seemingly believe that using the motorcycle move between P4 => P6, and even further to slightly beyond impact (as you demonstrate in your "continuing motorcycle move" video), will decrease the amount of lead forearm supination that is normally required between P6 => P7 in order to get a square clubface by impact. However, you fail to take into account the fact that the clubface closing benefit of ~20-25 degrees that is obtained by using the motorcycle move between P4 => P6 is offset by the clubface-opening effect of continuing to maintain a bowed lead wrist between P6 => P7, which causes the clubshaft to angle backwards away from the target. In that review paper, the author uses Collin Morikawa as an example, and he shows that Colin Morikawa comes into impact with a lot of forward shaft lean (where the hands are well ahead of the clubhead at impact). That opens the clubface relative to the ball-target line and that phenomenon necessitates more counterclockwise rotation of the lead hand in the later downswing. Finally, look at Jon Rahm's 3D lead forearm supination graph in that review paper, and note how much and how rapidly he has to supinate his lead forearm in his later downswing - even though he is a prototypical example of a golfer who uses the bowed lead wrist technique.