1 Engine breather hoses for K75, K100 2V & 4V and K1100 Fri 20 Dec 2024, 12:25
Rolf E
Silver member
I have made a plan to solve or reduce the costs of our age old headache with the breather hoses that perish and cause rough and irregular idling.
For the K75 and K100 2V I managed to get a local rubber component manufacturer to make the "Z" pipes at a fraction of the BMW price. (USD 6 +/-) See the pic below. If anyone needs I can have some made up but it's normally the shipping from SA that becomes costly. The one on the left is the original.
For the K100 4V and the K1100 breather rail at the back of the throttle bodies (develops micro cracks), I just made up a pipe out of 15mm copper piping and brazed on the 4 nipples and closed the ends. The inlet is straight in and works well by just cutting the rubber hose that comes from the air box shorter. The rail is attached to the TB with rubber hoses as per the 2 nipples on the right.
Hope this is helpfull to some.
For the K75 and K100 2V I managed to get a local rubber component manufacturer to make the "Z" pipes at a fraction of the BMW price. (USD 6 +/-) See the pic below. If anyone needs I can have some made up but it's normally the shipping from SA that becomes costly. The one on the left is the original.
For the K100 4V and the K1100 breather rail at the back of the throttle bodies (develops micro cracks), I just made up a pipe out of 15mm copper piping and brazed on the 4 nipples and closed the ends. The inlet is straight in and works well by just cutting the rubber hose that comes from the air box shorter. The rail is attached to the TB with rubber hoses as per the 2 nipples on the right.
Hope this is helpfull to some.
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1991 K100RS 16V VIN: K100RS 0200487 Engine# 104EB 3790 2230 Charcoal 166000km
1991 K100RS 16V VIN: K100RS 6408910 Engine# 104EB 2290 2130 Pearl White 217000km
1991 K100RS 16V VIN: K100RS 0200487 Engine# 104EB 1091 2053 Pearl White 77000km
1989 K75s VIN: K75s 0108752 Engine# 753EA42894104