BMW K bikes (Bricks)

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1Back to top Go down   K75 Street Tracker by -mek- Empty K75 Street Tracker by -mek- on Tue Nov 06, 2018 2:37 am

-mek-

-mek-
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I bought on September a former Swedish police 1992 K75 RT for a project base. It's technically quite good condition, but with 128 kkm's in odo, requires some thoroughgoing service.

A short clip of picking up the bike.



Preparing wheels for powder coating, fork service etc.


    

2Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Nov 19, 2018 2:56 am

-mek-

-mek-
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Steering head bearing was good. So just cleaning with kerosine and new CRC Super Longterm MoS2 Grease. I also drained the fork oil and flushed the forks with kerosene. I changed the springs to Progressive suspension. First I filled up with 420 ml Motul 7,5 W fork oil. Then adjusted the oil level to -160 mm (fork compressed, without springs), also removed about 10 ml oil. I think about 410 ml will give the -160 mm oil level, if you don't have a tool for measuring oil level. PS springs with the spacers that came with them, gave about 30 mm preload. Oil level and viscosity is easy to change later if I'm not happy, we'll see on May.

My bike has black forks, engine and final drive. I'm still not sure, whether to repaint valve and camshaft covers, since the fairing seals have scraped the paint away a little bit.

My RT had OEM heated grips, working. They were easy to uninstal since also the left heater element was glued to the sleeve which was then fastened by two M4 screws to handlebar. I started replacing the RT handlebar with LSL Flat Track handlebar, which I shortened to 800 mm. 10 mm hole on the middle, underside for heated grip wires and two 3,3 mm holes for fastening the left grip sleeve, then M4 threads. No problems.

The most work was sanding the right end to 22 mm. Almost all bars that are sold as 22 mm bars aren't really 22 mm, but 7/8" which is 22,2 mm. So the throttle grip does not rotate free on that, but the bar end must be sanded to 22 mm. Lots of sweat with sandpaper... I also covered the sanded end with thin layer of paint for protecting against rust.

Most of the service, ignored by previous owners, is done. I'm afraid the drive shaft splines have not been lubed for a long time. They were a bit worn, but hopefully will do still some years. I'm not gonna put so many km's for this bike. Two exhaust valves must be adjusted, but I'm still waiting for the ordered shims. I'll change the brake lines to Probrake Stahflex, but won't do it yet since the front line change requires cooler removal and I've still not got the Samco silicone hose kit yet.

When I get the wheels from powder coating, I'll build the front fender fastening. I also need the wheels for seeing how the bike stands with the new fork springs and Wilbers shock, if I have to adjust the front preload. Just then I'll be able to build the seat fastening to the right position and fit the Leo Vince GP-Style universal muffler to right position.


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3Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Nov 19, 2018 7:43 am

Dai

Dai
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So far, so good Very Happy


__________________________________________________
'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)
    

4Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Nov 19, 2018 2:19 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Those expansive Finnish paddocks looked very nicely raked.
K75 Street Tracker by -mek- 652573


__________________________________________________

1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '96 K1100RS, '09 K1300GT, '07 K1200R, '95 R100 Mystic & '77 R75/7.

    

5Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Nov 19, 2018 2:56 pm

Dai

Dai
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Bit difficult to trump that comment... K75 Street Tracker by -mek- 161205


__________________________________________________
'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   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Nov 26, 2018 2:04 am

-mek-

-mek-
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​Finishing the service. Two exhaust valves must be adjusted. Also got the brake lines changed to steel braided ones. The hose from front master cylinder to ABS is very tightly fitted under the frame, behind radiator. Removed the radiator first, but just when I got also the ECU loosened I got enough space for changing the hose.


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7Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Fri Dec 28, 2018 5:14 am

-mek-

-mek-
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Some progress during christmas holidays.


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https://www.youtube.com/user/mtubeist
    

8Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Fri Dec 28, 2018 1:43 pm

Dai

Dai
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Keep going! The end product promises to be good.


__________________________________________________
'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)
    

9Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Sat Dec 29, 2018 8:04 am

Laitch

Laitch
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I knew I recognized that repeating theme being played by the banjo in the background. There's no escaping the collective unconscious. Smile 


__________________________________________________
1995 K75T 68,000 miles
K75 Street Tracker by -mek- Usa-lo10
    

10Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Jan 07, 2019 2:54 am

-mek-

-mek-
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@Laitch wrote:I knew I recognized that repeating theme being played by the banjo in the background. There's no escaping the collective unconscious. Smile
That's interresting. I got the theme from https://audionautix.com/index.php

I wasn't so happy with the U-shape tube seat mount that I got before christmas. In my mind the seat sat a bit too high from the frame and I found it difficult for fastening hinges and original seat lock. So I let the grinder and drill sing... after few hours I got another solution. It still requires some fine adjusting, but I think it fits better than U-mount.


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11Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Wed Mar 13, 2019 3:14 am

-mek-

-mek-
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12Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Wed Mar 13, 2019 10:55 am

Time To Ride

Time To Ride
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Sweet, following this, thanks!


__________________________________________________
1994 BMW K75S  ABS
USA Bike   43,000 mi
    

13Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Apr 08, 2019 2:28 am

-mek-

-mek-
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​I got the elecrics ready and tested everything that can be tested without starting the engine. Replacing the dashboard was easy with Marulabs BEP 3.0. I also succeded pushing the dash connector trough the frame. The ECU-box must be removed first and it was still very tight between steering lock and frame tubes.

Right side coolant hoses from Samco didn't fit. I got the wrong set of hoses, now waiting for replacement. I first tried to make side-/center stand bracket and use the original ruber pad, but didn't succeeded with the tight and close bends, so I made a new one. Maybe it needs some rubber on it also. Welding 1,5 mm stainless steel exhaust with an inverter and 2,0 mm rutile coated electrodes was surprisingly easy, even the result is not so pretty... just be carefull not to burn trough.

Gas tank and front fender are still at painshop. K75 Street Tracker by -mek- 797640


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14Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon Apr 08, 2019 4:06 am

charlie99

charlie99
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K75 Street Tracker by -mek- 112350


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OK75 Street Tracker by -mek- Au-log10
    

15Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Wed Apr 17, 2019 2:03 am

-mek-

-mek-
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My build begins to be ready.

Some notes... I built the bike for my self, for everyday commuting. Not for someone elso or for the show. So, I haven't listened so much for the comments and (good) advice I've got. And I know my built isn't a pure street tracker... My idea was to build a bike it would have been if BMW had built a street tracker in late 80's. So that's why I didn't use any led blinkers or lights or mini bar end mirrors. All the lights and blinkers, as well as the muffler are CE approwed. However, the muffler approval is not for this specific model and it's quite loud, even with the db-killer on. For the first two rides I feel I succeeded. The riding position is nice, the bike handels well. Suspensions is quite sporty, but that's how I like it.

I still have some minor finishing to do, but a test ride was needed for example to know if I must adjust the BEP 3.0 switches before I seal it under the gas tank.



List of modifications:
Cut rear frame, pillion grip from Krad Werk
Cut rear fender
Self made rear fender & blinkers mount
Lucas style backlight
Ermax plate holder
Foundry MC custom made saddle
Self made saddle mounting plate
Gas tank repainted to BMW Indianapolis rot metallic with black stripes by Jani Stenius
Front fender from Krad Werk, painted to glossy black
Self made front fender mount
Self made front brake line brackets
Stainless steel brake lines by ProBrake
Progressive suspension front springs
Wilbers 630 series rear shock
BMW K 75 S mirrors
LSL Flat Track handlebar
Ariete grips for BMW R 1200 GS
Radiator closer to frame, like K75 S and K75 C
Samco silicone coolant hoses from Racebikebitz
Leo Vince GP Style muffler
Self made muffler and side/center stand brackets
Front light 7" and holders from Krad Werk
Acewell CA085 dash
Marulabs BEP 3.0 dasboard adapter
Self made dash mount
Foliatec led warning lights
Powder coated wheels by Laaksojen laatupinta Oy
Engine protectors from BSK Speedworks
Dart Classic flyscreen
Self made radiator protector
CNC gas tank emblems
BMW OEM tankpads
Merit horn
Ariete fork boots from Wunderlich


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16Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Thu Apr 18, 2019 1:39 pm

Dai

Dai
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Life time member
It's good to see it finished - well done that man!! Very Happy Very Happy


__________________________________________________
'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)
    

17Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Thu Apr 18, 2019 8:50 pm

Woodie

Woodie
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Looks good MEK!  Hopefully your commute is long enough each way to really enjoy the ride.


__________________________________________________
1985 K100RT
52667
"Keep your stick on the ice.  We're all in this together."  Red Green
    

18Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Fri Apr 19, 2019 3:41 am

chris846

chris846
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That's an excellent project, you've got a tidy looking bike that'll beat any new bike when it comes to forever reliability, cost and ownership and spares parts, and simplicity and ease of maintenance. Plus, you're the guy who knows it from end to end because you built it.

- and you can alter it or improve it anytime you want!

I'm biased, but I think the K75 is a much better base for a build. The K100 is much bulkier and heavier by comparison, too much so for the extra 'power' (ahem) that it puts out, if not the comparative coarseness over the '75. The '75 just makes a much more usable bike for nipping around on. Just my opinion.

Hope you enjoy it as much as I enjoy mine!


__________________________________________________
The Longest Lunch
    

19Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon May 06, 2019 2:51 pm

-mek-

-mek-
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That's it.

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-01

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-02

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-03

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-04

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-05

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-06

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-08

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-09

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-11

K75 Street Tracker by -mek- BMW%20K75%20Street%20Tracker-12


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20Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon May 13, 2019 1:53 am

-mek-

-mek-
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"Executive summary"


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21Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon May 13, 2019 7:30 am

Dai

Dai
Life time member
Life time member
Now get out and ride it! Very Happy Very Happy


__________________________________________________
'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)
    

22Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon May 13, 2019 9:01 am

duck

duck
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False advertising!  You make installing the radiator hose through the crank cover look easy. Shocked


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

23Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon May 13, 2019 10:10 am

duck

duck
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@chris846 wrote:I'm biased, but I think the K75 is a much better base for a build. The K100 is much bulkier and heavier by comparison, too much so for the extra 'power' (ahem) that it puts out, if not the comparative coarseness over the '75. The '75 just makes a much more usable bike for nipping around on. Just my opinion.

Agree wholeheartedly with this.

(But then again I'm a slut for K75s.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

24Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Mon May 13, 2019 3:35 pm

tinyspuds

tinyspuds
Silver member
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Great result well done. I wish I’d seen that trick with the rad hose before I did mine Mad.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

25Back to top Go down   K75 Street Tracker by -mek- Empty Re: K75 Street Tracker by -mek- on Wed May 15, 2019 4:09 am

-mek-

-mek-
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@tinyspuds wrote:Great result well done. I wish I’d seen that trick with the rad hose before I did mine Mad.
Silicone spray and zip tie or wire around the hose to shrink it, so the hose goes easy through the crank shaft cover.


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https://www.youtube.com/user/mtubeist
    

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