Mugen MBX5R
#1051
Tech Master
iTrader: (13)
Hi,
Question about the stock brakes (steel rotors with steel calipers and blue pads):
After racing last weekend my front brake performs unevenly.
When the motor idles, the rotor can spin freely (with approx. 0.2mm clearance), but gets caught between the pads once in a while. Also, when actually applying the brake, it shows uneven brake performance; something like little grip for 1/4 turn of the rotor, tight grip for the next 1/4 turn and so on.
I had changed the rotor already, but same thing after just one race. Rotors, calipers and pads are pretty new. Can it be that the screws that hold the calipers are threaded into the plastic at an angle?
Any other ideas what could be the cause of this?
Thanks a lot,
Frank
Question about the stock brakes (steel rotors with steel calipers and blue pads):
After racing last weekend my front brake performs unevenly.
When the motor idles, the rotor can spin freely (with approx. 0.2mm clearance), but gets caught between the pads once in a while. Also, when actually applying the brake, it shows uneven brake performance; something like little grip for 1/4 turn of the rotor, tight grip for the next 1/4 turn and so on.
I had changed the rotor already, but same thing after just one race. Rotors, calipers and pads are pretty new. Can it be that the screws that hold the calipers are threaded into the plastic at an angle?
Any other ideas what could be the cause of this?
Thanks a lot,
Frank
#1052
Tony is that idea with the o rings just to hold the back pad tight to the center mount ?? what about a small o ring between the pads
#1053
Tech Adept
iTrader: (6)
Ditch the pads and run just the metal calipers on Thunder Tiger option discs (Part # PD1861). You can also use the o-ring trick I got from Ralph Walters of Innovative Design to get the brakes even better. Just use a thin o-ring (like the one from a carb insert) and put them in between the pads, wrap around the center diff mount and then attach to the back of the brake screws poking out the back (use screws long enough so they poke out about 2.0mm). You'll be able to adjust less play out of the brakes so they are much more responsive plus they won't drag. Finally, you can very carefully cut cross hairs on the TTR discs like a tic-tac-toe board (#) using a hacksaw blade. Just make sure the blade is flush and barely cut into the ceramic material on both sides of the discs. The brakes will never feel better
Thanks a lot for your tips! A friend from the race track told me that you want to dremel little cutouts for the dogbone pins?
Thanks,
Frank
#1054
#1055
Tech Master
iTrader: (13)
Yes the o-ring wrapped around the diff mount holds the inside pad tight against the center mount. Using just a small o-ring between the pads doesn't work so well. You need to have play so the disc spins freely but the inside pad needs to be tight so the brakes don't drag as you work the throttle.
#1056
Tech Elite
iTrader: (17)
Yes the o-ring wrapped around the diff mount holds the inside pad tight against the center mount. Using just a small o-ring between the pads doesn't work so well. You need to have play so the disc spins freely but the inside pad needs to be tight so the brakes don't drag as you work the throttle.
#1057
Tech Master
iTrader: (13)
Some guys use the small springs but I never really cared for them. With the o-ring, one caliper is tight while the other is loose. I like having the outside caliper free. I adjust the brake screw so I have enough play that the disc is free and the brakes don't drag. With the spring there is a load on both calipers so neither is free. The o-rings will last an entire season too .
#1059
Tech Elite
iTrader: (17)
I never seemed to have any issues with the stock brakes, both buggy or truggy. My truggy will pull an "end-o" at the end of the straight you get on the brakes fully. Never faded either. Then again, I don't use the Mugen linkages or the fuel tubes on the brake rods either.
#1060
Tony are the electrical terminals to stop the brakes coming back to far and binding on throttle
#1061
#1063
#1064