Originally Posted by
savannahmick
I have put some good money into my SC10 by buying all the FT options and a Speed Passion 17.5 esc/motor. Anyway my question is about the RPM arms I have been using them for awhile but they seem to soft/flexible and should I just go back to the stiffer standard arms? Also what gearing are you guys using with a 17.5 setup? One last question my SP 17.5 has vent holes in the motor can and should I cover the vent holes(piece of nitro air filter) since my track is dusty? Anybody else using the M2C tapered hole pistons? Thanks for any info/help!
RPM arms are good in that they are a bit more flexible. You will not miss any races from breaking like you would with the stock arms. But you should check you hinge pins to see if they are bent. The stress will divert from the arms and back onto the hinge pins.
I use RPM arms for the durability. I run on a clay outdoor track with good size jumps and it can get a bit bumpy at times. So they work OK for me. But if you're on a high bite track that is smooth and not so big, stock arms will give you a bit more precision in handling.
As far as covering your motor, I wouldn't. I would make sure I took the motor apart more frequently to clean it out. You don't want debris in the bearings and between the rotor and stator.