You're partially correct.AVGeek said:
After three days in and out the shop in Ouray and in my local shop in Canada they finally believed me that the ABS unit was sucking in Air and was replaced under warranty . I believe the unit is around $1100.Brick said:
Ray they did the same with mine. Day one canadian dealer bled the brakes, day two bleed them again, day three dealer had a Yamaha rep come and bleed the brakes, day four leaving for Colorado I myself bled the rear, only lasted about 100km, day five tried again still no luck and gave up. And it's dam well bloody nerv racking riding with no rear brakes in the rain. Arrived in Ouray dealer told me it's impossible for air to enter though through the unit so back to bleeding the brakes. Day two changed the master cyl with no luck and this time they marked the oil level in the reservoir and used talcum powder on all the lines , that only lasted a few pumps on the rear brake. Next day back to the dealer and this time the reservoir had about 1/4 inch more oil than the day before and all the lines where dry ( no leaks ). So after all this they removed the ABS unit from one of the bikes on the floor . Problem solved.Old Git Ray said:
I wonder if it's a stuck valve in the ABS unit that is bleeding fluid from one side to the other. Would an ABS Diagnostic check catch that. It's supposed to work the valves in the ABS unit to check for operation, isn't it :question:limey said:
If I have this problem I hope it goes while under Warranty.....$1500 yikes! If I had to pay that out of pocket I would be riding less and worrying more.....gonpro said:
::026::offcamber said:
Koinz said:::026::
Totally Agree. I'm going to have to exercise my rear brake abs stops more often.
If this becomes more predominant, I wonder if Yamaha would recall this as a safety issue. People who had this problem should register on the NHTSA site.
::026::Checkswrecks said:
Just checked. Mine are at 4.29mm. Disc has some pretty good waves formed on it, too. Looks like I'm ordering a new disc.~TABASCO~ said:
The system is a half and half thing. If the rear sensor ring tells the system there is slippage, it only pulses the rear. Same for slippage sensed only in front, it won't pulse the rear. So, yes, it does work both the front and rear brakes, but not necessarily at the same time. It seems to be an internal leak of some sort, maybe a solenoid going hyperactive causing the cavitation/aeration people are seeing. The air is not getting in from outside, as noted, it would trade places with fluid if that was happening. The rise in fluid level noted could be air displacement. Cavitation is really the only hydraulic phenomenon I can think of that will 'magically' create air in a closed system.Derekj said:
There are 2 tests you can perform on the ABS unit in your garage. They are found in the shop manual and just require a jumper on the ABS connector under the seat. (sky blue to black)ridefire said:
My ABS unit was replaced under warrenty.Mzee said:
