Gradually Jacob calmed down again from the bliss he had whilst having transformation sex with Matt. He pulled his member out of what was now Matt's exhaust pipe, he was still laying with his upper body on Matt's behind, a sloped down curve to make him more aerodynamic.
Then Jacob got up, to sit down on Matt's seat, his flacid member lying on top of it. Matt's suspension visibly gave way in response to the added weight, but the motorcycle found that it was still well withing acceptable ranges. In fact Matt was completely aware of himself. He could see through cameras and radar antennas throughout much of his body. He could feel Jacob sitting on the padding of his seat and feel his weight on his suspensions, the full status of his engine, his hidden weapon systems, everything. What he didn't have was control. While he was able to observe everything he could only make technical adjustment, just like any onboard computer of a motorcycle.
Meanwhile Jacob was browsing through the menus. Among the usual ones you'd find on any bike computer he found a menu labelled "FORM". In it there were various options to change the model of the motorcycle along with its color and what parts of it would change, a quick browser through the models even featured "human" as the first choice. "I'm not going to change you back that quicky", he said before selecting the color feature and quickly changed Matt's primary colour to green. A wave of colour rushed over the motorcycle turning all the parts previously painted red to green. Jacob changed it back to red, and those parts changed back again. "Nifty", he noted to himself.
The next menu was labeled "CAPABILITIES" and selecting it allowed him to enable or disable what parts of his motorcycle body Matt would have control over. Setting included, "VOICE", "ENGINE", "STEERING" and "RADIO" among other things. They were all selected as off. For a moment Matt hoped he would be able to regain at least some control on this situation.
Then he exited that menu and entered the one named "MIND", in it there were options to change Matt's character and his memories. He selected the later and selected a random memory of Matt getting to Jacob's place today. He hovered over the delete option then said, "Nah, I wouldn't do such things," a mischievous grin came over his face as he continued, "would I?". He went back and selected Matt's emotional state displayed as a set of bars. He could see his fear lowering a bit, but still hovering at a decent level. His horniness was at a slightly rising level, as Matt thought about what implications those menus might have.
Jacob noticed that those options made himself horny as his member was now slowly getting erect himself. He got an idea and stood up to turn around and sit down on Matt's seat the other way round. Rubbing his stiff penis against the back rest of Matt's seat as he was concentrating on his left foot. Soon enough it started to change. His foot started to curl up into an impossible form, his toes joining the chaft of his feet as they formed a loop. Gradually turning darker and darker changing their natural texture to a tire profile. Then they grew both towards the inside and the outside. Inside they formed the hub of the wheel while the outside grew to about 2 feet in diameter, pushing his leg up from the increased height. His lower leg moved to the left, out of the wheel itself, still connected to the hub. It's material seemed to change from the cloth of his flight suit to metal, gradually changing from metal to cloth as it goes upwards. Then his lower leg shrunk down both in diameter and length making it a thin rod just long enough to compensate for the wheel instead of the leg. Then he stood up, both of his legs now at about the same total length, rolling his new wheel against the ground as this was part of his jet-flighter form.
Skating around with it his eyes fell upon Matt's emotional status, indicating high levels of horniness.
He got down close to Matt's front and said, "Now what shall I do with you?".