Author Topic: Jacking up the front wheel of K75S  (Read 7408 times)

Offline alexg

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  • Posts: 202
Jacking up the front wheel of K75S
« on: October 30, 2018, 09:49:55 PM »
Hi all:
I think that I have a caliper that is a little sticky. To service, I have tried to lift the front of the bike using a jack and a piece of soft wood under the belly pan (even the user manual indicated this). However, I am afraid of damaging the pan, as I will be mostly pushing on plastic that is 25 years old. Any better/safer process?

Thanks.

AlexG
  • Michigan
  • '93 K75S, 1975 BMW R75/6 & 1984 Yamaha RZ350
Alex G.

Offline rbm

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Re: Jacking up the front wheel of K75S
« Reply #1 on: October 30, 2018, 10:00:35 PM »
Can you attach a hoist or rope to a beam in the garage and lift by the triple tree?
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline Martin

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Re: Jacking up the front wheel of K75S
« Reply #2 on: October 31, 2018, 02:05:50 AM »
I use two 4' length of 2x4 and a couple of ratchet straps. Place bike on centre stand and slide the two pieces of timber under the centre stand about a foot one per side. Chock up the front wheel until the back tyre is of the ground. Remove the side covers and loop the ratchet strap around the timber and the frame and tighten. Pictures show the straps around the tragkorb frames but I have since revised the method and go around the frame. Kick out the front chock. I always do both sides as a safety measure but one side appears to hold.

Regards Martin.


* Front end lift 1.png.jpg (56.27 kB . 768x576 - viewed 447 times)
* Front end lift 2.png.jpg (48.26 kB . 768x576 - viewed 505 times)
* Front end lift 3.png.jpg (61.13 kB . 768x576 - viewed 496 times)
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline The Mighty Gryphon

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Re: Jacking up the front wheel of K75S
« Reply #3 on: October 31, 2018, 07:41:44 AM »
Brilliant!
  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline K1300S

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Re: Jacking up the front wheel of K75S
« Reply #4 on: October 31, 2018, 09:28:21 AM »
put bike on centerstand.
have someone lean on back of bike to lift front
insert 2x4 of correct length behind rear wheel between ground and triple tree.

NEVER lift from belly pan.

actually, the best way is to just unscrew the two bolts that hold the belly pan on and take it off, then jack off the engine case.  pan is simple to remove.
Project Thread "K75s Midlife Refresh"
http://www.motobrick.com/index.php/topic,7810.0.html
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Offline alexg

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Re: Jacking up the front wheel of K75S
« Reply #5 on: October 31, 2018, 09:58:16 AM »
Thanks for all the replies. This confirms my fear of jacking the belly pan. Thanks,
AlexG
  • Michigan
  • '93 K75S, 1975 BMW R75/6 & 1984 Yamaha RZ350
Alex G.

Offline bocutter Ed

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Re: Jacking up the front wheel of K75S
« Reply #6 on: October 31, 2018, 10:11:30 AM »
I find 30-40 lb on the pillion will drop the rear to the ground ...
  • Toronto, Canada
  • '61 Puch DS60 - '66 Puch 250 SGS - '87 BMW K75s

Offline Chaos

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Re: Jacking up the front wheel of K75S
« Reply #7 on: October 31, 2018, 10:40:25 AM »
take the belly pan off, put a piece of wood under the sump and jack to your heart's content. 
  • sw ohio
1987 K75S    VIN 0231
Original owner, Original litter
200,000 miles (plus or minus) and 5 paint jobs
sold 6/23
2023 Ural 2WD sidecar (BMW's bastard step child)

Offline JPaganel

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Re: Jacking up the front wheel of K75S
« Reply #8 on: October 31, 2018, 12:05:30 PM »
My other bikes, I would just put weight on the back.

If the centerstand isn't wonky, it works fine.
  • Minnesnowta
  • 1986 K100RT, 1996 R1100RS

Offline Laitch

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Re: Jacking up the front wheel of K75S
« Reply #9 on: October 31, 2018, 07:35:40 PM »
If the centerstand isn't wonky, it works fine.
It works fine unless weight is accidentally applied to the front end causing weight on the rear to be accidentally displaced; then wonky really comes into play. :giggles  Of course, mishaps rarely happen in home workshops.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline JPaganel

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Re: Jacking up the front wheel of K75S
« Reply #10 on: October 31, 2018, 08:21:49 PM »
It works fine unless weight is accidentally applied to the front end causing weight on the rear to be accidentally displaced; then wonky really comes into play. :giggles  Of course, mishaps rarely happen in home workshops.

Well, that be why I strapped it down. :D
  • Minnesnowta
  • 1986 K100RT, 1996 R1100RS

Offline Laitch

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Re: Jacking up the front wheel of K75S
« Reply #11 on: October 31, 2018, 08:26:59 PM »
Well, that be why I strapped it down. :D
I missed that part in your illustration. :giggles
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline lmiklosy

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Re: Jacking up the front wheel of K75S
« Reply #12 on: November 03, 2018, 11:17:31 PM »
The belly pan is held on by 6mm bolts through two rubber grommets near the front, a single bracket in back.  Place a flat piece of wood across the grommets and lift with a hydraulic jack.  A 2x4x12 inch will do. This way grommets carry enough load to lift the front wheel without damage to the pan.  Takes seconds to set-up and quite stable, just allow the centerstand to carry most of the bike weight.
  • Laguna Beach, CA
  • 1993 K75S-Mystic, 1981 R100RS-RedBaron, 1991 K75S-Marrakech

Offline alexg

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Re: Jacking up the front wheel of K75S
« Reply #13 on: November 04, 2018, 01:06:07 PM »
The two front 6mm bolts screw into a glass reinforced plastic bracket, which is rather flexible. I decided to take the belly pan; 4 bolts, 3 minutes. On top, I discovered that the peeping hole of the water pump had a small green drop at the tip; to be monitored.

Thanks for all the replies.

AlexG
  • Michigan
  • '93 K75S, 1975 BMW R75/6 & 1984 Yamaha RZ350
Alex G.

Offline Billk

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Re: Jacking up the front wheel of K75S
« Reply #14 on: November 05, 2018, 10:26:19 PM »
To Alexg.
In reference to the drop of liquid from the front weep hole,
change the coolant before you do anything else
  • NYS
  • Owned many BMWs and Harley's presently '95 75K and '14 V Strom
Presently own a 1995 K75 and a 2014 Suzuki DL650

Offline beemuker

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Re: Jacking up the front wheel of K75S
« Reply #15 on: November 06, 2018, 07:49:40 AM »

NEVER lift from belly pan.

actually, the best way is to just unscrew the two bolts that hold the belly pan on and take it off, then jack off the engine case.  pan is simple to remove.
that's what I do. It helps to loosen the rear bracket to get the pan back on. after you do it a few times it just takes a few minutes
  • Panama City, FL
  • '00 R1100RT,’92 K75 RT,past tense:'83 R80ST, '93 K1100LT,,94 R1100RS K75s, Honda NC700, Suzuki Bandit 1200, bmw R75/5 Honda 750

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