Front Brake Shudder

[guzziduc]

Hey guys, New to the board. I have a 1990 Paso cast rotors same shudder issues. Also had this on a 1986 FJ1200 it also had cast rotors but they were vented like a cars rotor. I started to feel the shudder/pulse on it after 70K miles or so and on inspection found the surface was worn down past the usable surface. I has small holes showing up in the braking surface, porosities in the casting. Replaced the rotors with some good salvage ones and it went away. I need to look close at the Paso rotors to see if I have the same issue. Replacing these are bit more expensive than the Yamaha but I'll take the Paso over the FJ any day.

[enzo906]

I tightened the steering head more than I like but the shudder has gone. Next step is replace the bearings and torque correctly. I would guess the problem is a dud bearing / s.

I suppose 17 years is good life span for a steering head bearing. I probably should have changed it when I noticed the wheel bearings were past their prime.

Thanks for the information along the way.

[Thunderstruck]

I've had it for a long time, so it can't be a factor of pad wear. For me it occurs under moderate to hard braking. I'm getting new (correct) tires so we'll see if that has any effect.

Hi, what do you mean by "correct tires"? I thought that tires were not available for the 750 paso.

[spaynenda]

A lot of water has gone over the dam since I posted that comment. I was able to score a correct tire for the rear at last summer's VMD swap meet at Mid Ohio (although it must be five years old), but my source for the front couldn't deliver. As a result, I had to fit a 120/80. So far, it seems to handle okay, although I haven't put many challenging miles on, but it doesn't look right. Also, I had to reposition the front fender up some to clear the new profile.

Sorry, but that's the situation. I guess we're not making any progress on a new source, not even Coker or someone like them. For the long term, we'd better consider 17 inch wheels or mothballs.