04 WR450 Front Brakes, No Stopping Power!
Posted April 17, 2009 - 07:10 PM
I have bled the front system countless times, from the caliper to a bench bleed, with not much change.
The stock pads were the worst. I switched to Galfer "Black"/ semi metallic and it grabs better, but not like it should. These are the best pads for my KTM, but I'm not sure what the Yamaha likes.
I noticed the stock rubber front brake hose would flex as the lever is squeezed, so I put on a stainless braided. The hose flex went away but the stopping power is not there.
I put in a master cylinder kit, bled the system and it's no better.
I've used brake cleaner on the pads and rotor, deglazed the pads, scuffed the rotor looking to get a clean bite again and nothing better.
I'm about ready to take the front master cylinder off from my old '01 KTM and try it.
Does anyone have any suggestions or better experience with these front brakes?
Posted April 18, 2009 - 03:00 AM
Posted April 18, 2009 - 10:28 AM
Awesome for supermoto, tho.
Posted April 18, 2009 - 02:55 PM
Do you have pressure on the lever? Does it change when you pump it?
Is there ever a time when the brakes work better (after a bit of riding).
Are you contaminating the pads? It doesn't take much handling to permanently ruin a set of pads.
What are you doing to bleed it, and how do you know you have all the air out?
Posted April 18, 2009 - 05:14 PM
Posted April 20, 2009 - 06:55 AM
Fork seal leak. Yes I did just change the fork seals because of a leak. I didn't know the pads could be contaminated because of that, I cleaned them with brake cleaner and thought this should be good. I will try a new set of pads.
I had a AA rider ride it and give me his opinion. He thinks the lever feel is great, but just doesn't grab. Back to the fork oil contamination. Makes sense to me.
Any advice on brand of brake pads? I am always willing to try something new if it works better.
Posted April 20, 2009 - 12:13 PM
I was told you can take the contaminated pads and "bake" them in an oven to burn off the oil, but I just opted for new pads as the old ones were more than 50% gone.
Posted April 21, 2009 - 05:55 AM