BMW K bikes (Bricks)


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1Back to top Go down    Rear Brake Pedal on Tue Sep 27, 2016 8:45 am

JGT

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The rear brake pedal on my K75 isn't obviously damaged but the square foot pad has a definite anti clockwise twist to it so my foot catches the outer edge and bottom right hand corner of the pad on applying the brake. I'm tempted to remove, apply some heat and try and bend it back so the pad is square to the bike. What type of aluminium is it? will it respond to this? if it has been bent and damaged will the Ali. have work hardened? John


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1987 K75s 1969 Bultaco Matador
    

2Back to top Go down    Re: Rear Brake Pedal on Tue Sep 27, 2016 9:44 am

RicK G

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If you bend it back it will probably fracture. If you heat it and cool it quickly it will go soft and then can be straightened however it will then bend easily with the force applied in braking. If you can determine where the bend is then you can bend it back in a different place but they are still a bit prone to fracture. Best outcome is to get a good straight one without any salty corrosion (makes the under side look flaky).


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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: Rear Brake Pedal on Tue Sep 27, 2016 5:42 pm

88

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Have a good read of this thread by Moto Smith onForging aluminium. I used this technique to straighten the rear pedal on my LT about 14,000 miles ago.


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88....May contain nuts!

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

4Back to top Go down    Re: Rear Brake Pedal on Tue Sep 27, 2016 6:30 pm

BobT

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If you have access to a potter oven or similar. Heat the part to 500c for 30 minutes, quench in water after removel from the oven and bend it how you want within about an hour. After that time it will start to slowly harden again.

    

5Back to top Go down    Re: Rear Brake Pedal on Tue Sep 27, 2016 6:44 pm

duck

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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

6Back to top Go down    Re: Rear Brake Pedal on Tue Sep 27, 2016 7:20 pm

blaKey

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"Just replace it with a good used one."

+1


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Neil
K100RS 1986 RED!
K100RT 1987 (now nekkid with red bits)

Remember Rule No. 6
    

7Back to top Go down    Re: Rear Brake Pedal on Wed Sep 28, 2016 5:07 am

JGT

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Confused I am! Went on Ebay to look for a replacement and they all seem to exhibit the same trait, the pad is not square to the pivot axis???????


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1987 K75s 1969 Bultaco Matador
    

8Back to top Go down    Re: Rear Brake Pedal on Wed Sep 28, 2016 8:16 am

duck

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None of them have a straight line from the base to the tip - otherwise they would be pointing outward a bit.

However, one that is bent slightly inward compared to how it came from the factory so that it is not parallel to the bike's direction can be annoying. (I had one before like that.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

9Back to top Go down    Re: Rear Brake Pedal on Wed Sep 28, 2016 8:24 am

Born Again Eccentric

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Alternatively... a little dressing with a file, dremel or (very carefully) with an angle grinder, might be sufficient just to reshape the pad so that it doesn't catch on your boot ... but not so much that you substantially reduce the size of the pad. Just a thought.


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Paul

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurancewrite-off rebuild Feb 17
"Donor" K100LT 1990 (Red) (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike). June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

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