BMW K bikes (Bricks)

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1Back to top Go down   Bent Valve Issues at High Speed Empty Bent Valve Issues at High Speed Mon May 03, 2021 6:04 am

GF Wollongong

GF Wollongong
Life time member
Life time member
Found this on youtube which might make some of use reconsider bent valve extensions on our bikes if riding around 180km/h. Might want to put up with awkward tire inflations.

Basically it tore off the rim at high speed leading to rapid deflation

The Streamliner Case - Mercedes-Benz original - YouTube

Play from 17.50 for several minutes

GF

    

2Back to top Go down   Bent Valve Issues at High Speed Empty Re: Bent Valve Issues at High Speed Mon May 03, 2021 9:16 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Getting the air chuck on the front wheel valve stem is a pain in the ass, especially on the 16V bike with the big brake rotors.

I got one of these guys with the right angle chuck. It really makes it easy to check and add air.

https://www.ebay.com/itm/Air-Inflator-Tire-Pressure-Gauge-90-Degree-Chuck-Reinforced-19-Rubber-Hose-/303971773620?hash=item46c6212cb4


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

3Back to top Go down   Bent Valve Issues at High Speed Empty Re: Bent Valve Issues at High Speed Mon May 03, 2021 11:01 am

Laitch

Laitch
Life time member
Life time member
@GF Wollongong wrote:Found this on youtube which might make some of use reconsider bent valve extensions on our bikes if riding around 180km/h.
That settles it for me! I will never use an inner tube with an angled inflation valve in my Brick's tires no matter how great the temptation.  drunken


__________________________________________________
1995 K75 81,000 miles
Bent Valve Issues at High Speed Usa-lo10
    

4Back to top Go down   Bent Valve Issues at High Speed Empty Re: Bent Valve Issues at High Speed Mon May 03, 2021 11:09 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
@Laitch wrote:
@GF Wollongong wrote:Found this on youtube which might make some of use reconsider bent valve extensions on our bikes if riding around 180km/h.
That settles it for me! I will never use an inner tube with an angled inflation valve in my Brick's tires no matter how great the temptation.  drunken

Especially an inner tube that is that big and from 1938!  How the heck will I get it in the tire?


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

5Back to top Go down   Bent Valve Issues at High Speed Empty Re: Bent Valve Issues at High Speed Mon May 03, 2021 11:27 am

Suzi Q

Suzi Q
Life time member
Life time member
It is possible to replace the entire valve with a 90' angled one - I have done this on my bikes and I don't think they would have this issue. I think the video showed one of those 90' adaptors that screws onto the original valve in place of the dust cap. The rubber stem of the valve would have been unnaturally stressed as a result of the centripetal force acting on the extension. Maybe the valve was very old?


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

6Back to top Go down   Bent Valve Issues at High Speed Empty Re: Bent Valve Issues at High Speed Mon May 03, 2021 12:34 pm

Laitch

Laitch
Life time member
Life time member
@Suzi Q wrote:I think the video showed one of those 90' adaptors that screws onto the original valve in place of the dust cap. 
cheers Bent Valve Issues at High Speed 723598 Bent Valve Issues at High Speed 112350
Bent Valve Issues at High Speed Scree145


__________________________________________________
1995 K75 81,000 miles
Bent Valve Issues at High Speed Usa-lo10
    

7Back to top Go down   Bent Valve Issues at High Speed Empty Re: Bent Valve Issues at High Speed Mon May 03, 2021 12:37 pm

Suzi Q

Suzi Q
Life time member
Life time member
Yeah, me too. What were those guys f******* thinking??


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

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