BMW K bikes (Bricks)


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1Back to top Go down    Hand brake on Thu Mar 17, 2016 7:26 pm

akarua01

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Hi again (shouldn't leave your bike sitting) now the front brake lever won't pump up pressure. I haven't pulled it apart yet. Do I just strip it down or is there a simpler fix?

    

2Back to top Go down    Re: Hand brake on Thu Mar 17, 2016 8:22 pm

RicK G

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If there is any fluid leaking out you probably need a kit to fix it but try bleeding the system first. I had air get into the system on the K100 once and never figured out how.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

3Back to top Go down    Re: Hand brake on Thu Mar 17, 2016 9:22 pm

Holister

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+1 that... but if its leaking around the base of the reservoir it'll just be the o-ring on the base. Cheap and easy to replace.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

4Back to top Go down    Re: Hand brake on Thu Mar 17, 2016 10:23 pm

Two Wheels Better

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Cheap and easy, unless the PO never flushed the fluid like on my K100. The taper where the o-ring seats was corroded so it leaked even after a thorough clean up... replacement of the hydraulic portion and reservoir where my only options.


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'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

5Back to top Go down    Re: Hand brake on Fri Mar 18, 2016 8:50 am

Holister

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I read somewhere that once they start to corrode they've had it... the corrosion will always return. Fortunately, when I pulled mine apart to replace the o-ring, it was in ok condition.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

6Back to top Go down    Re: Hand brake on Fri Mar 18, 2016 9:11 am

charlie99

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about to do mine again twb

the refurb I did a few years ago seemed to seal ok ...but I have noticed that it is leaking from the same area that you mention
fortunately this time I have an dremel type tool that can resurface the inner seal area / core of the reservoir metal work
its the pitting around the seal areaI see as the issue
ill give it a try at least and report my findings

meanwhile I'm onto a hopeful solution to the core of the master cylinder piston- bore that might be a good recommendation instead of throwing $200 aussie sheckles away to the dealers for a new master cylinder

hope you find a solution mate
cheers


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

7Back to top Go down    Re: Hand brake on Fri Mar 18, 2016 11:21 am

Two Wheels Better

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Chaz, mine was literally flaking into bits, even carefully sculping it into some kind of funnel didn't help, and I knew it was a long shot when I fitted back up and went to bleed the brakes. It's not gushing, mind, but does set a bead of brake fluid within a coupla hours. My solution was to ask Mark and Dana at Vallantine's, a Seattle workshop, whilst delivering parts to them the other morning, whether in their pile of scrap upstairs they had a spare unit laying about. They did, and as we have a friendly relationship, gave the crusty old piece of kit to me at no cost! Praise be! Thank you. The reservoir looks like new, the innards acceptable, but I'll chuck a seal/piston kit into it and we should be laughing. I too don't wish to part with too much dosh on this project, though she's coming up pretty clean after a few essentials and a bit of a scrub up. The K100 inches closer to the road, at last.

Wish I'd known in February that you needed a MC as I've got my clean, useable RS original in my shed in Beenleigh. Doh!


__________________________________________________


'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

8Back to top Go down    pumps bothways on Tue Apr 05, 2016 7:24 pm

akarua01

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Hello again well I pulled the master cylinder apart and cleaned it and when I test it, It seams to pump and suck any ideas, it was not leaking so that's not a problem. Question

    

9Back to top Go down    Re: Hand brake on Wed Apr 06, 2016 12:04 am

RicK G

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Check that both holes from the resevoir to the cylinder are open, one is very obvious and the other is very small and can be overlooked easily. It is about 0.5mm in diameter and is just forward (away from the lever) of the larger hole.


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

10Back to top Go down    hand brake on Wed Apr 06, 2016 6:21 am

Gordon Smith

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A touch of Phosphoric Acid usually stops the dreaded white worm in Aluminium.

    

11Back to top Go down    hole on Wed Apr 06, 2016 6:57 am

akarua01

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Thanks as soon as I get home I'll have a look for an extra hole I only noticed one the other is probably blocked I'll be home Tuesday

    

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