FGMatt Posted November 23, 2025 Posted November 23, 2025 Basically as per the title really; what are the holes in the side of the motor for? It looks like they would be for fitting an extra wheel set, but I can't see any part that would fit there. Or did they intend it, but never put the part into production? Quote
Sven J Posted November 23, 2025 Posted November 23, 2025 The older version of the side decoration element has a little "nose" which fits in this hole. Quote
FGMatt Posted November 23, 2025 Author Posted November 23, 2025 5 hours ago, Sven J said: The older version of the side decoration element has a little "nose" which fits in this hole. Fair enough, but that seems a little chicken-eggy to me. Quote
zephyr1934 Posted November 24, 2025 Posted November 24, 2025 I wouldn't be surprised if there were early plans to let you put a dummy wheel in that slot. There was a few year period at the start of 9v where Lego promoted the compatibility of 9v and 12v systems. Since the 12v motors had an optional 3rd wheel they probably designed that option for 9v but never put it in production. Quote
RedBrick1 Posted December 1, 2025 Posted December 1, 2025 On 11/23/2025 at 10:08 PM, zephyr1934 said: I wouldn't be surprised if there were early plans to let you put a dummy wheel in that slot. There was a few year period at the start of 9v where Lego promoted the compatibility of 9v and 12v systems. Since the 12v motors had an optional 3rd wheel they probably designed that option for 9v but never put it in production. I'd love to see some 3d print designers come up with a wheel to fill this gap. Would a fun 'what-if'. Quote
Ashi Valkoinen Posted December 5, 2025 Posted December 5, 2025 This technic hole is also placed at the PF and PU motors. However, compared to a normal technic hole, it is quite loose and have no grip when you put a stud into it. Very unfortunate! Quote
Ashi Valkoinen Posted January 1 Posted January 1 I got so upset of the useless technic hole on the side of PF/PU motors I figured out how any decoration can be built on it safely. Get a minifigure hand, put the hand clip into the hole (just like it can be done with antistuds), and put the perpendicular middle part of a pneumatic T-piece into the figure hand. The hand stressed against the wall of the technic hole with the bar inside will result in a sturdy grip. Quote
XG BC Posted January 1 Posted January 1 oh thats awesome, gives some more Attachments for side details! Quote
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