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82 750t front tire sticking

  • Thread starter Thread starter dcsowrider
  • Start date Start date
D

dcsowrider

Guest
Hi all,

Ive been having a problem with my front tire locking up occasionally. When I bought the bike it had new pads put on and i noticed when pushing it it really defined the T for "tank". i could barely move it. i put it on the stand and found the front tire to be locked up, so i took off the caliper and squeezed it in with a c-clamp and it was better, After riding it for a bit the rotor wasnt getting hot and it freed up, but after letting it sit it stuck again. so i took of the caliper and checked the pads and one side was noticeably worn more than the other, indicating the caliper was sticking. so i squeezed it in again and checked the pins but they move freely and the boots arent ripped. I put it on and i can spin the tire close to a full rotation before stopping. Should it be spinning freely?

Do you think there is a problem internally in the caliper causing it not to be going back in fully?
 
I would take the caliper off and pull the piston. There are areas inside the well that crud will settle in and never get flushed out. Also, youll remove the rubber seal and notice the groove the seal sets in is full of oxidation and built up chalky grey stuff. This builds up and presses the seal tighter and tighter against the piston till it stops moving.

Clean the brown crud out, clean off the seal with some light rubbing of a finger nail and some fantastik or other household cleaner, and get the groove as clean as you can.

Then clean out the master cylinder and be sure the tiny tiny return hole is open.
 
"Do you think there is a problem internally in the caliper causing it not to be going back in fully?"

Oh yeah, the single piston needs to push on both sides about evenly and then release - yours is probably binding from corrosion/damage :time to rebuild as this is highly dangerous and not something to ignore or hope will go away before you do!
 
Not only that, but heat build up can instantly lock a wheel...and at speed thats not where you ever want to be!!!!!

Thats why i said service the rear system as well.
 
Thank for the info. I'll go take a look in a little while and let you know the problem. The rear system is a drum and I haven't had any problems with it
 
I am not all knowing what every bike has and doesnt, so I just included the warning. Still check everything out back over too for your piece of mind.
 
The entire system should be torn down and cleaned out. The caliper is full of crud so that means the line is too, and maybe even the master. Replace the parts that are in need and replace the brake line. This is serious stuff. Don't shortcut the maintenance.

Please check the Newbie Mistakes thread linked in my signature for more details of what to look out for.
 
I loosened the banjo bolt and the wheel freed up so it must be gunked up. I'll take it apart soon and replace the brake line
 
if the compensating port in the master cylinder is plugged the brake will apply as you as you ride.
The compensating port is there to allow fluid to expand into the master cylinder reservoir as it heats up in the caliper. When the port is plugged the brakes start to apply instead, creating more heat, more expansion, eventually the wheel will lock.
To confirm this, crack the bleeder and the caliper will release its grip on the rotor. You can see the port in the bottom of the reservoir, right in front of the fill port, the hole is tiny,(wire brush whisker).
 
So now you got an idea as to how gunked up your master cylinder is...right????? So just think how much crap is inside the caliper too!! Do the ENTIRE system repair as was suggested by myself and Ed.
 
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Adventures with Single Disc Front Brake GS750TZ

Adventures with Single Disc Front Brake GS750TZ

Hey "T" owner, any pics of your bike available?

I've done a front caliper/master cylinder/braided line install on my "T" and am I glad I did. There was a lot of gunky build-up in there...and I was riding it for almost a year before I did the change. Never had issues like you discuss but I'm guessing your bike needs immediate attention.

The rear drums weren't much of an issue but check them just the same. I bought new shoes before I inspected the ones I intended to change...they had plenty of thickness left in them (I had Bill inspect them too).

I've got pics of my adventure with the front brakes...wait, you'll have to review the thread but I'll get you to the post #.

Start at Post #52.

http://www.thegsresources.com/_forum/showthread.php?216696-82GS750T-Seal-T-M-Gear-Shift-Oil/page2


Ed

EDIT: Just reviewed your post with pics...Nice "T". Why the heck would you go cross-country without doing a complete eval of your "T"? [Curious]

http://www.thegsresources.com/_foru...14-82-750t-saddlebags-and-luggage-rack-advice
 
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GSXR7ED said:
Hey "T" owner, any pics of your bike available?

I've done a front caliper/master cylinder/braided line install on my "T" and am I glad I did. There was a lot of gunky build-up in there...and I was riding it for almost a year before I did the change. Never had issues like you discuss but I'm guessing your bike needs immediate attention.

The rear drums weren't much of an issue but check them just the same. I bought new shoes before I inspected the ones I intended to change...they had plenty of thickness left in them (I had Bill inspect them too).

I've got pics of my adventure with the front brakes...wait, you'll have to review the thread but I'll get you to the post #.

Start at Post #52.

http://www.thegsresources.com/_forum/showthread.php?216696-82GS750T-Seal-T-M-Gear-Shift-Oil/page2


Ed

EDIT: Just reviewed your post with pics...Nice "T". Why the heck would you go cross-country without doing a complete eval of your "T"? [Curious]

http://www.thegsresources.com/_foru...14-82-750t-saddlebags-and-luggage-rack-advice
Click to expand...

Wow that cleaned up real nice! To give a little more background, I'm graduating college this coming May and have wanted to take a trip for some time. I'm planning on moving out west, hopefully Colorado if all goes well. But before I do that and get settled down with a job, my good friend came up with the idea of a motorcycle tour. I immediately jumped on board because i've always wanted a bike anyway and the thought of seeing the country on the back of a bike couldn't be any more perfect. We then enlisted another friend who is much more knowledgeable of motorcycles and so it became a trio.... So I managed to scrape up enough money to buy the bike in October, got my permit and got some riding in before the snow fell. Now comes the big task of planning this whole thing and getting the bike prept for spring. It's a bit ambitious but crazier things have been done and we are far from shy of adventures. So any help, tips, advice, support would be immensely appreciated. As none of us have any experience with touring.
 
Speaking of cross-country type adventures on a T, look up some of Tank's threads on this forum. No one has done more impossible stuff on one of those. Simply amazing. :cool:
Perhaps you could PM or E-mail Tank as he is the resident T expert. If you want to see the finest example of a T, search for some of Spyder's threads.
 
I've Got A Hunger

I've Got A Hunger

^^Well, how bout that Mr. Adventure...moving from New York to Colorado!!!

I guess if I thunk about doing that I woulda kept my Luggage Rack (which I sold to a member here but never got paid--some things we learn from).

You gotta be ready for the elements for sure...a wet-weather parka and trousers comes to mind. Travel light...I usually pack more changes of underwear than trousers...and at least 5 shirts. I'm use to putting the bike on my trailer and heading out...but that was because I had job to get to this past year.

Good luck with the maintenance...lemme tell you; patience is a must. Rushing any maintenance (no matter how discerning) is just not worth the effort if you take shortcuts. Thanks for the positive reply...I re-read my question and it came off kinda questionable (without inflection).

Seeya around and post pics of your adventures with your "T".


Ed
 
Hey all,

I removed the brake line and caliper today. Removed the piston and cleaned the gunk out of the cylinder. I also cleaned the master cylinder out with brake cleaner, which was coated with a thick gray slime. I then used compressed air to clean out the teeny tiny return hole. Which was definitely plugged. So hopefully this fixed the problem. I'm going to order a braided Goodridge DOT line with new banjo bolts soon.

Thanks for all the help!
 
Brake Job

Brake Job

^^I felt a sense of accomplishment when I completed my MC/caliper/braided line rebuild. I used AGE solvent and soaked the parts for 36hrs. Post pics, we love em'.


Ed
 
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