86 rear brakes

[anderson8687]

like a few others on here i am currently doing rear brakes on my 86 200x. replaced seals, sliders, and hoses, currently bleeding them...and its taking forever! im not sure if the pedel is getting stiffer or my arm is getting tired.....ive put about 4 resviors full of fluid through it...when i crack the bleeder it comes out, but i was just wondering about how long this should take (im fearing my master may not be up to snuff) Thanks for any imput.

[Aka_am]

I have a 86 x, as well. I just filled each part with fluid from the cylinder to the res with a syringe (this time a eyedropper). works everytime.

[Dirtcrasher]

Hey bud, sorry, I meant to reply sooner after I saw this thread.......

I would NOT be afraid to take apart the master cylinder piston and clean it all spotless with brake cleaner. I do that allot and it can't hurt at all. Just clean it, blow it all out and put it back together with a bit of brake fluid on there.....

Unfortunately, thats the best you can do! I think the piston kit for that is discontinued but it may very well be still available or aftermarket too (hyperparts.com) That model may be rebuildable, I'm not sure but I'd check with Honda 1st, although I have had NO ISSUES with the aftermarket rebuild kits available...... They work fine for me :)

As for bleeding, if it's pushing it thru, then the piston is doing something...... One thing to do is to remove that bleeder screw completely and check the 3 holes. The 2 side holes are tiny, it's the taper when the screw is tightened that prevents it all from leaking. But, the top hole is just as important as is the cavity the screw sits and bottoms into/on. I'm not sure if it's a "31 drill" but for some reason that comes to mind, but that can clean out the center hole. Then a teenie tiny drill does the 1 or 2 side holes and make sure it's all flushed out when done.

So many times when I have bled breaks I've forgotten to check them and they are usually filled with GUNK, WHITE STUFF and just corroded.............

Bleeders often crush those side holes if people over-tighten them.

Let us know what you find in there.........:beer (I'm having a beer for you right now :D, Supercross is on SPEED channel right now.......)

P.S. - IDK where you can find it (Vets have it) but I use a large diameter syringe to pull and often PUSH fluid back up to the master cyl. to get most of the bubbles out. And both sides of that hose need a crush washer on there or air will seep in and fluid out!!

[KASEY]

i use a piece of old gas line from the bleeder to the rezzy.. then you don't have to keep filling it up,, and you can get all the air out,,,

[anderson8687]

hey DC, i cleaned every part that i could take out of the caliper...im a machinist so i had acces to all the drill sizes, and i drilled out all corroison...in the bleeder screw, banjo bolts...then i used new lines from the resv. to master and new banjo fittings and new line from master to caliper. the caliper has a e-brake block off plate which i made sure had a flat contact surface on the caliper. basically the only part i didnt touch was the master cylinder...i could pump the brake and hold my thumb on the end of the hose and i could feel the suction..so i didnt bother touch the master. have bleed it many times, each time i crack the bleeder, fluid comes out (and decreases in resvoir) but pressure doesnt increase at the pedal. $22 bucks for a master rebuild kit on ebay....probably worth it at this point?

[anderson8687]

also just wanted to add that i have the crush washers on both sides of each banjo fitting....have also had a few beers over this saga...and did see the supercross on speed!

[Mr_RPM]

squeeze the brake line with a pair of vise grips then press the pedal if it is firm then the air is trapped in the caliper if its still mushy the the problem is in the master cylinder

[anderson8687]

good idea...ill try that today, thanks mr. rpm. lets say it is air "trapped" in the caliper, what would be causing that? i looked back at DC's caliper rebuild on his 86 200x (20 day build to trikefest) and followed each tip he suggested....i cant imagine what could be holding that caliper up.

[250rrider]

goood old breaks.............damn

[Mr_RPM]

good idea...ill try that today, thanks mr. rpm. lets say it is air "trapped" in the caliper, what would be causing that? i looked back at DC's caliper rebuild on his 86 200x (20 day build to trikefest) and followed each tip he suggested....i cant imagine what could be holding that caliper up.

If its in the caliper its just trapped air. Try removing the caliper, holding it up high and taping it lightly with the handle of a screw driver while bleeding it.