user151: Does a Buddha or Arahant not make good or neutral karma? If somehow an enlightened one does make karma does it immediately come to a result? Are all the actions enlightened beings  do the result(vipaka) of previous good karma while on on the path to Nirvana? Is all the enlightened karma neutral?

user43: Buddha spoke about cessation of karma and liberation from karma. For Arahant, or for Buddha, there's no acquiring of karma anymore. Indeed, if they still acquired karma, how could we call it "liberation"?
But how can an Arahant or a Buddha act without acquiring karma? 
In my understanding, this is possible because only appropriated action, i.e. action considered to be done "by me" counts as that person's own karma.
Since an enlightened being does not reify the concept of "a being" or "self", there is no-one left to acquire karma. There is no way Buddha could appropriate his actions as "I did this", because he had done away with the notion of "I", he only used it for communication with the unenlightened.
So whatever we think is done by Buddha or Arahant, from their perspective is not their (personal) intention, and is therefore not their (personal) karma. 
Buddha's actions can still have results. Generally speaking, in terms of results, this is the third type of actions, one that leads to cessation. We can still observe some of the results of Buddha's actions in our own lives - us studying and practicing Dharma. In fact, the results are unfolding in front of our own eyes, in form of this question and answer site. But these results are not Buddha's personal karma, since they did not come bundled with the concept of "self".

user13709: The outcome of deeds is discussed in AN4.233:

“Mendicants, I declare these four kinds of deeds, having realized them with my own insight.
What four?
There are dark deeds with dark results;
bright deeds with bright results;
dark and bright deeds with dark and bright results; and
neither dark nor bright deeds with neither dark nor bright results, which lead to the ending of deeds.

The fourth is the destination of the Noble Eightfold Path:

And what are neither dark nor bright deeds with neither dark nor bright results, which lead to the ending of deeds?
  It’s the intention to give up dark deeds with dark results, bright deeds with bright results, and both dark and bright deeds with both dark and bright results.
  These are called neither dark nor bright deeds with neither dark nor bright results, which lead to the ending of deeds.
  These are the four kinds of deeds that I declare, having realized them with my own insight.”

In other words, in giving up identity view and all its wishes, the grasping that leads to rebirth, continued existence and suffering is relinquished and extinguished.
Note that non-arahants with some attainment as well as arahants would both relinquish the first three deeds in favor of the fourth. The difference is that non-arahants would still wish and need to practice towards the realization of the fourth clause. They would still have some identity view (e.g., "the conceit, 'I am'").
With Right Wisdom and Right Freedom, arahants will have given up all deeds. Arahants will, per this sutta, have attained the "ending of deeds".

user8157: In its essence, "kamma" means "action" with attachment. 
While the suttas do refer to "kamma without attachment" namely, "neither-dark-nor-bright kamma" (AN 4.237), this type of kamma is also called the "kamma that ends kamma" (AN 6.63). Therefore, it is not really "kamma". 
the essential meaning of "kamma" is "action with attachment", as follows:

And what is the right view with effluents, siding with merit,
  resulting in acquisitions (attachment)? 'There is what is given,
  what is offered, what is sacrificed. There are fruits & results of
  good & bad actions.... 
MN 117

Refer to Bhikkhu Buddhadasa PDF booklet: Kamma in Buddhism

151: <p>Does a Buddha or Arahant not make good or neutral karma? If somehow an enlightened one does make karma does it immediately come to a result? Are all the actions enlightened beings  do the result(vipaka) of previous good karma while on on the path to Nirvana? Is all the enlightened karma neutral?</p>
 43: <p>Buddha spoke about cessation of karma and liberation from karma. For Arahant, or for Buddha, there's no acquiring of karma anymore. Indeed, if they still acquired karma, how could we call it "liberation"?</p>

<p>But how can an Arahant or a Buddha act without acquiring karma? </p>

<p>In my understanding, this is possible because only <em>appropriated</em> action, i.e. action considered to be done "by me" counts as that person's own karma.</p>

<p>Since an enlightened being does not reify the concept of "a being" or "self", there is no-one left to acquire karma. There is no way Buddha could appropriate his actions as "I did this", because he had done away with the notion of "I", he only used it for communication with the unenlightened.</p>

<p>So whatever we think is done by Buddha or Arahant, from their perspective is not their (personal) intention, and is therefore not <em>their</em> (personal) karma. </p>

<p>Buddha's actions can still have results. Generally speaking, in terms of results, this is the third type of actions, one that leads to cessation. We can still observe some of the results of Buddha's actions in our own lives - us studying and practicing Dharma. In fact, the results are unfolding in front of our own eyes, in form of this question and answer site. But these results are not Buddha's <em>personal</em> karma, since they did not come bundled with the concept of "self".</p>
 13709: <p>The outcome of deeds is discussed in <a href="https://suttacentral.net/an4.233/en/sujato" rel="nofollow noreferrer">AN4.233</a>:</p>

<blockquote>
  <p>“Mendicants, I declare these four kinds of deeds, having realized them with my own insight.</p>
  
  <p>What four?</p>
  
  <p>There are dark deeds with dark results;</p>
  
  <p>bright deeds with bright results;</p>
  
  <p>dark and bright deeds with dark and bright results; and</p>
  
  <p><strong>neither dark nor bright deeds with neither dark nor bright results, which lead to the ending of deeds.</strong></p>
</blockquote>

<p>The fourth is the destination of the Noble Eightfold Path:</p>

<blockquote>
  <p>And what are neither dark nor bright deeds with neither dark nor bright results, which lead to the ending of deeds?
  It’s the intention to give up dark deeds with dark results, bright deeds with bright results, and both dark and bright deeds with both dark and bright results.
  These are called neither dark nor bright deeds with neither dark nor bright results, which lead to the ending of deeds.
  These are the four kinds of deeds that I declare, having realized them with my own insight.”</p>
</blockquote>

<p>In other words, in giving up identity view and all its wishes, the grasping that leads to rebirth, continued existence and suffering is relinquished and extinguished.</p>

<p>Note that non-arahants with some attainment as well as arahants would both relinquish the first three deeds in favor of the fourth. The difference is that non-arahants would still wish and need to practice towards the realization of the fourth clause. They would still have some identity view (e.g., "the conceit, 'I am'").</p>

<p>With Right Wisdom and Right Freedom, arahants will have given up all deeds. Arahants will, per this sutta, have attained the "ending of deeds".</p>
 8157: <p>In its essence, "kamma" means "action" <em>with attachment</em>. </p>

<p>While the suttas do refer to "<em>kamma without attachment</em>" namely, "<em>neither-dark-nor-bright kamma</em>" (<a href="https://suttacentral.net/an4.237/en/thanissaro" rel="nofollow noreferrer">AN 4.237</a>), this type of kamma is also called the "<em>kamma that ends kamma</em>" (AN 6.63). Therefore, it is not really "kamma". </p>

<p>the essential meaning of "kamma" is "<em>action with attachment</em>", as follows:</p>

<blockquote>
  <p>And what is the right view with effluents, siding with merit,
  resulting in <strong>acquisitions (attachment)</strong>? 'There is what is given,
  what is offered, what is sacrificed. <strong>There are fruits &amp; results of
  good &amp; bad actions</strong>.... </p>
  
  <p>MN 117</p>
</blockquote>

<p>Refer to Bhikkhu Buddhadasa PDF booklet: <a href="https://www.suanmokkh.org/system/books/files/000/000/089/original/Kamma_in_buddhism_Buddhadasa_bhikkhu.pdf?1485253529" rel="nofollow noreferrer">Kamma in Buddhism</a></p>
