540C Xl only works with 18T+ size pinions?!?!?

[Patrick]

Yeah, I've heard about and seen that problem with the finned fiegao'ss, neu's and hackers.
Some people grind the fins, some people use the 65t spur (can't remember who makes it). I think the spur needs a little bit of modding to get it to work on the strobe and the motor goes out past the top adjustment slot on the stock plate so you have to mod the motor plate or make another one.
OR you could spend some more money and get the hybrid bulks and some 1/8th diffs and change your ratio that way (51/15/e-maxx diff =16.67:1 . 51/18/buggy diff =16.14:1):027: