BMW K bikes (Bricks)

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bmwk100rs

bmwk100rs
Silver member
Silver member
I need to re-thread the final drive stud bolt, does anyone know the thread pitch for it?  Is it 1.75 or 1.50?
What is the thread pitch of the final drive stud bolt? B0000710
What is the thread pitch of the final drive stud bolt? Img_1117

    

Laitch

Laitch
Life time member
Life time member


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1995 K75 81,000 miles
What is the thread pitch of the final drive stud bolt? Usa-lo10
    

Dai

Dai
Life time member
Life time member
Pitch gauges... I thought I was the only one here who still uses those!


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1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

bmwk100rs

bmwk100rs
Silver member
Silver member
@Dai wrote:Pitch gauges... I thought I was the only one here who still uses those!
Pitch gauges might help you to determine the pitch thread, but it will NOT tell you the pitch type, which in this case turned out to be a coarse thread. In the U.S., M12-1.5 coarse thread is NOT common.

    

Laitch

Laitch
Life time member
Life time member
@bmwk100rs wrote:Pitch gauges might help you to determine the pitch thread, but it will NOT tell you the pitch type, which in this case turned out to be a coarse thread.
Pitch type is a comparative and relative description of thread length determined by the number of threads in a given length.  That is determined using a pitch gauge. With bolts of the same diameter, the bolt with a coarser thread will have fewer threads in a given length than the fine thread bolt. To determine the correct bolt for the threaded hole, you can compare threads with a pitch gauge to narrow your search or you can just find bolts and try them one after another to see if they be fully installed without cross-threading.


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1995 K75 81,000 miles
What is the thread pitch of the final drive stud bolt? Usa-lo10
    

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