The yogic chakras in Raja yoga, Kundalini yoga based on fiction and body-based. +

The yogic chakras in Raja yoga, Kundalini yoga are based on fiction and body-based whereas the Soul,  the Self is the formless, timeless and spaceless existence.  without the body, the kundalini ceases to exist.  Kundalini is based on the false Self,  therefore,  Kundalini is a false theory. 

It was noted that there were nervous plexuses and nodules at intervals in the spine and other parts of the body. Upon this basis, the Yogis started imagining that if the mind were concentrated on each one a different mystic result would be obtained. Yoga is mere physicalized practice is not the means to acquire the Advaitic wisdom.  When the ‘Self’ is not the body but the ‘Self’ is formless Soul then the question of chakras does not arise. 

Panchadasi, P.509 v,109, shows the impossibility of yoga arriving at a successful end to its practices.  

The Yogi or mystic who sees or experiences something in his meditation, which he takes as the highest is merely an individual experience, within the false experience (waking) “whatever is based on individuality is not the ultimate truth or reality or Brahman.

Nature of the Soul, the 'Self'  is like deep sleep.   The self is within the three states as its formless substance and it is beyond the states of waking, dreaming and dreamless sleep as their formless witness. The nondual self-awareness has to be attained only, through wisdom. 

In yogic and mystic Samadhi is based on the body and experienced as the body as the Self.  Those who have witnessed it as an external phenomenon report that the experiencer appeared to have fallen into a kind of trance. The hair on the head and body stood erect. The half-closed eyes became fixed. Sometimes there was an astonishing loss of weight or even levitation of the body from the ground. But these are mere symptoms, and tell us nothing. There is only one way to find out what yogic Samadhi is like: one must have it himself.

Sage Sri, Sankara said:~ Neither by the practice of yoga nor philosophy, nor by good works nor by learning, does liberation come, but only through the realization that Atman and Brahman are one in no other way. (1) VivekaChudamani v 56, pg 25

A man's spiritual consciousness is not awakened unless he becomes aware of the fact that ‘I’ is not the self, but the formless soul or consciousness is the innermost self.

By activating Kundalini power, one does not get non-dual wisdom. The wisdom does not dawn without realizing the fact that the world in which man exists is false.  To realize the world is falsehood it is an impossible task through yogic practice because yoga is limited to the physical entity, and it holds the world as reality.

As per the yogic texts: The Kundalini dwells in the Muladhara. When it is aroused, it passes along the Sushumna- nerve, goes through the centers of Svadhisthana, Manipura, and so on, and at last reaches the head. This is called the movement of the Mahavayu, the Spiritual Current. It culminates in Samadhi. Thus, Kundalini is subjected only to the physical body and experienced as a body, whereas as the Self is not the body because the self is formless. Thus, what value the kundalini will have when the kundalini is based on physicality,  whereas the Advaitic wisdom is based on the formless, timeless and spaceless reality. 

Remember:~

It is impossible to stop thought for more than a second whilst in the waking experience. If one succeeds in controlling thought and then banishes it, one passes into Nirvikalpa samadhi, which is identical with deep sleep. The only difference between ordinary deep sleep and samadhi, therefore, is that the ordinary man falls asleep involuntarily whereas the yogi has the satisfaction of knowing that he has passed into sleep by his own effort of will in banishing thoughts.

Yoga can yield the only duality because everything that one can do or practice becomes a vanishing 'known.' It yields relative truth based on imagination, which is true from a physical viewpoint of view, not the non-dualistic or Advaitic truth, which is the ultimate reality.

The yogic truth is the individual truth, not universal. The "Religions place God as the unknown reality” Every religious believer has a different idea of God. Every man has a different idea of reality. Hence the need of definition before the study.

The yogic teachings about six chakras and seven chakras of Raja yoga are based on fact and fiction.

It was noted that there were nervous plexuses and nodules at intervals in the spine and other parts of the body. Upon this basis, the yogis started imagining that if the ego is concentrated on each one a different mystic result would be obtained. But that is mere fancy.

Manduka Upanishads:~ Those who want Brahman will not practice control of the mind. That is Yoga for duffers. The others will inquire and practice discrimination. (p.231)

Yoga and samadhi are not goals but a means to an end, i.e. Gnana. Samadhi in itself is useless because the mind is withdrawn and there is no memory of it until after it is over and one returns to waking state. Yogi who attains mind control: it is only sleep. The world must be seen before you can know its true nature in Gnana. The yogi who shuts it out thereby deprives himself of the opportunity to achieve Gnana.

BRIH. Upanishad:~ "Yoga does not yield truth or liberation."( page 32).

The Gnani sees the essential universal unity and the multiplicity of objects simultaneously. The person in deep sleep or samadhi leaves out the objects and sees the essence; hence, he has not the full Gnana. There was no permanent cure however without Gnana, and Yoga does not yield Gnana.

Sage  Sankara in the commentary to "Brahma Sutras:- "The highest beatitude is not to be attained by Yoga." (Sacred Books of East Series page 298 Vol.1.) And he also says Samadhi is the same as sleep (p.312)

 ~this indicates that yoga is not the means to self-realization. And yogic Samadhi is not nondual self-awareness. : ~ Santthosh Kumaar