RS Warrior Forum banner

What have I done wrong?

1.8K views 25 replies 8 participants last post by  Chief  
#1 ·
Put the fork tube covers on, of course had to remove brake calipers and wheel.
I used a torque wrench to torque the brake caliper bolts and the allen bolt for the wheel. I think the torque wrench I used may not have been so accurate in the lower settings.
Anyway, on the recent S. California Warrior run, I had a very noticeable chee, chee sound when applying the front brakes. Almost like the rotor was warped.
I think I may have over tighted the nuts holding the caliper in place.
Would this cause the pads to not be flush with the rotor when the brake is applied?
Any thoughts are appreciated.
 
#10 ·
I bought a more precise torque wrench tonight. I'll retorque to see if that improves the situation. I don't think the rotor would be warped. I can't imagine how that would happen since I did not remove the rotor.
Daimon. Not sure what you mean by turning the pads around. Do you mean swapping the pads on the existing caliper? I'll try this if the retorque does not work.
Thanks
 
#13 ·
Are you talking about a vibration a slow speeds? i notice when i am driving in my subdivision that if i go perfectly straight i feel noting weird, but as soon as i lean/turn left or right.... i feel a little vibration, and it ends as soon as the bike starightens up. i can feel it in the pegs and bars, comes from the front, but its very mild. not sure you would notice it if you werent payign attention.
 
#15 ·
The noise only is evident when applying the front brakes at any speed. Imagine applying the front brakes, pads rub against the rotor, then comes the scraping sound (i have described it as chee, chee). When I installed the wheel, I made sure to install it with the same direction of rotation.
Anyway, I am going to break it all apart and re-torque to see if that addresses the issue.
 
#18 ·
Cupping comes from the tire lifting off the road during breaking. So you get more traction then less and you create flat spots.
1 If you ever locked up the tire and flat spotted it, you will not even notice it, then it could get worse.
2 90% of the timr their is to much rebound in the fork. Which we have so when you hit a bump the tire bounces.
3 I have read but do not agree with the inflation thing. I think people see the low tire and assume that was the problem without having any facts to back it up. No one has yet to show me where the force that causes the cupping is coming from in this case. All others it is pretty evident.
 
#21 ·
If it is cupping on the side then I would think that is where your tire is riding. I would make sure your air PSI is right.


Wolf the biggest problem is the fork is cheap. The spring is too soft so we crank down the preload so that the bike does not nose dive into the corner. This basically compresses the spring and then it over works the valving. The guys who ride longer distances at one time are more likely to have the problem because the oil being forced by the valve gets hot then thins out then starts to foam. All of that makes matters worse.
So IMO if you went to a heavy oil you would only add to the problem because it would still blow by the valve stack but it would get even hotter and foam that much quicker.
The fix is to go to a heavier spring; Works now offers multi rate springs, and have the valve stack reworked to better suit the bike. The fork is not the greatest in the world but it is really not that bad for what it has to do. The internal parts are not up to the task though.
I think springs are 99 bucks and a revalve is $200 look around you might find better.
You want .80 - .90kg/mm spring I would guess, this will depend, then they will beef up the rebound stack to deal with the stiffer spring and open the compression some to soften the hard hit that is dialed in to deal with the soft stock spring. (the reason the fork feels so harsh is because in order to deal with the soft spring thy tighten up the compression so that you don't blow through all the travel) This will get you a plusher ride and it will be more progressive so you soak up the small bumps but you don't nose dive under braking or bottom the shock on a big bump.
 
#23 ·
Going stiffer will stop the bike from nose diving under braking and you prett much have to do it. But then the front does not want to stick in a bumpy corner because the tirs does not maintain good contact. Just like the rear, when you down shift the rear end skips and jumps. That is in large part to poor rebound control in the rear shock.

A good suspension would change this bike 100 fold.
 
#24 ·
Not to derail the cupping discussion, but I replaced caliper bolts (others were rounded) and torqued to the right specification.
Also torqued fork tube clamps, axle bolt, pinch bolt.
No more brake noise. Don't know if those that have the brake noise have checked the torque on the bolts, might be the cure.
By the way, the lower caliper bolt on the left caliper had actually sheered off. Kind of scary considering the ride taken last Sunday.