BMW K bikes (Bricks)


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1Back to top Go down    Rear Shock on Tue Oct 31, 2017 2:54 pm

tagaz

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Pardon me if this should be posted elsewhere.

What is the knurled knob on the bottom of this shock.

TIA for any and all replies,

Troy

    

2Back to top Go down    Re: Rear Shock on Tue Oct 31, 2017 4:52 pm

BobT

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Rebound damping adjustment.

    

3Back to top Go down    Re: Rear Shock on Tue Oct 31, 2017 4:52 pm

WoodyAUK75

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Judging by its position, I would say it is for draining or adding oil.

    

4Back to top Go down    Re: Rear Shock on Tue Oct 31, 2017 6:40 pm

BobT

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@WoodyAUK75 wrote:Judging by its position, I would say it is for draining or adding oil.
No definitely an adjustable damping knob. Not possible to add oil to the bottom of a shock.

    

5Back to top Go down    Re: Rear Shock on Tue Oct 31, 2017 7:19 pm

Dai

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Bob's right.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

6Back to top Go down    Re: Rear Shock on Tue Oct 31, 2017 10:34 pm

JR_K100RS

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has it been mounted upside down ? , my aftermarket shock is the other way around , remembering all that logic about unsprung weight etc , fix the heavier moving part to the frame , the lighter moving part to the wheel

John Re

Melbourne Australia


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Diamond Grey ( 617 ) 1987 K100RS ( European Delivery ) Original owner
    

7Back to top Go down    Re: Rear Shock on Wed Nov 01, 2017 1:29 am

Laitch

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@JR_K100RS wrote:has it been mounted upside down ?
Different brands of shocks have differing mounting positions. A Progressive 465 gets mounted piston upward. The K75 riders manual shows the stock shock mounted piston downward.


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1995 K75T 68,000 miles
    

8Back to top Go down    Re: Rear Shock on Wed Nov 01, 2017 4:36 am

BobT

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Unsprung weight! Your'e having a laugh. This is a BMW K100 with a wheel that weighs in at twice what my Ducati does, and a shaft drive that might as well be made of cast iron.
The popular RAM shock is almost identical to the one in the picture and is mounted that way up.

    

9Back to top Go down    Thank you for the replies on Wed Nov 01, 2017 2:04 pm

tagaz

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Thanks to all who have replied.

I believe Bob is correct on this one.

I will experiment with turning it a bit each way and see what effect it has.

First must find the source of the fluid leak from the fd.

Regards,

Troy

    

10Back to top Go down    Re: Rear Shock on Wed Nov 01, 2017 4:18 pm

Point-Seven-five

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@BobT wrote:Unsprung weight! Your'e having a laugh. This is a BMW K100 with a wheel that weighs in at twice what my Ducati does, and a shaft drive that might as well be made of cast iron.
Exactly!!!


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

11Back to top Go down    Re: Rear Shock on Wed Nov 01, 2017 6:55 pm

JR_K100RS

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Ouch ! , er yup I was having a laugh ! Embarassed

John Re

Melbourne Australia


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Diamond Grey ( 617 ) 1987 K100RS ( European Delivery ) Original owner
    

12Back to top Go down    Re: Rear Shock on Sun Nov 26, 2017 5:10 pm

Two Wheels Better

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@tagaz wrote:I will experiment with turning it a bit each way and see what effect it has.
Troy
I think you will find that turning the knurled knob to the left (anti-clockwise) will deliver a slightly softer or slower feel to the ride and to the right a firmer, or quicker response. I usually make a large adjustment rather than small steps so I can more accurately gage what changes my adjustment has rendered. With small steps you might not feel much change at all.


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'77 R75/7-1000cc, '87 K100RS, '93 K12 Big Block, '94 R100 Mystic, '03 K1200GT, '04 R1150RT, '06 K1200R, '07 K1200R & '09 K1300GT
Two Airheads, three Bricks, an Oilhead and a trio of new K's.
    

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