BMWSportTouring BMWST DB
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#977868 - 01/09/17 01:47 PM Re: Winter time maintenance list... [Re: Marlen Padberg]
dirtrider Offline
The Oracle
Member

Registered: 06/05/10
Posts: 11831
Loc: Ohio
Afternoon Marlen

I looked in my hexhead & camhead BMW dealer shop manuals & there is nothing listed for either lateral or radial run out so BMW pass/fail specs are undetermined.

On most modern alloy rim motorcycle wheels the general accepted spec is: maximum axial and radial runout of 2.0 mm (0.080").

My personal spec is a little tighter & I generally use: maximum (desired) axial and radial runout of around .75mm (0.030") or less but I won't quibble with 1mm (0.039").

Added: I did find the BMW 1150RT wheel runout specs in my BMW 1150 manual as follows---

Max. radial runout/lateral runout
Front wheel .............................. 0.5 mm (0.0197")
Rear wheel ................................ 0.3 mm (0.0118")


Edited by dirtrider (01/09/17 01:51 PM)
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#977944 - 01/10/17 01:33 PM Re: Winter time maintenance list... [Re: Marlen Padberg]
freetime2247 Offline
Newer Member

Registered: 05/26/16
Posts: 23
Loc: Louisiana
What is the semishpere?

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#977948 - 01/10/17 02:28 PM Re: Winter time maintenance list... [Re: freetime2247]
dirtrider Offline
The Oracle
Member

Registered: 06/05/10
Posts: 11831
Loc: Ohio
Originally Posted By: freetime2247
What is the semishpere?


Afternoon freetime2247


The SemiSphere is a little domed cap that goes between the end of the valve stem & the rocker arm to allow the rocker arm to articulate & move the valve up & down.

The thickness of the SemiSphere controls the valve lash. There is a SemiSphere on each valve.

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D.R. ___
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#977949 - 01/10/17 02:41 PM Re: Winter time maintenance list... [Re: Marlen Padberg]
freetime2247 Offline
Newer Member

Registered: 05/26/16
Posts: 23
Loc: Louisiana
Wonder how that fell out while performing the valve check?

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#977950 - 01/10/17 02:50 PM Re: Winter time maintenance list... [Re: freetime2247]
dirtrider Offline
The Oracle
Member

Registered: 06/05/10
Posts: 11831
Loc: Ohio
Originally Posted By: freetime2247
Wonder how that fell out while performing the valve check?


Afternoon freetime2247

I don't think it fell out DURING the valve check, I would imagine it fell out after the valve check when the engine was started.

I think the clip holding the rocker arm on came off, then the rocker arm slid out & allowed the SemiSphere to fall out.
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D.R. ___
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