Author Topic: 87 K75C, Bone Stock and DONE.  (Read 211437 times)

Offline trek97

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Re: 87 K75C injectors
« Reply #225 on: March 13, 2017, 09:20:42 PM »
The injectors were probably 50% when I started.  Spraying multiple tight little streams. (you can kinda see the streams in the photo)  Then they came around and blasted a sweet even fine fog.
  • Illinois
  • 87 K75C

Offline Laitch

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Re: 87 K75C injectors
« Reply #226 on: March 14, 2017, 12:35:04 AM »
I am a amateur and unsure as to what you are saying? Should I try this at  home?  :dunno 
NO!  hahaha
It's only because you're an Ozian, Martin. Here, it's our right to spray inflammable liquids around electrical connections then onto a pile of rags in the privacy of our homes. GBA!
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Martin

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Re: 87 K75C injectors
« Reply #227 on: March 14, 2017, 01:21:10 AM »
Rats Laitch you mean I don't have the right to self incineration, I might have to emigrate.  :dunno :musicboohoo:
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Laitch

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Re: 87 K75C injectors
« Reply #228 on: March 14, 2017, 01:28:00 AM »
Rats Laitch you mean I don't have the right to self incineration, I might have to emigrate.  :dunno :musicboohoo:
The only place you can smoke here without offending is your home so you'll need to buy a cottage for your combustion rite.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Martin

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Re: 87 K75C injectors
« Reply #229 on: March 14, 2017, 02:12:46 AM »
Laitch I'll have go find a palm tree and ruminate on this. But it's going to be a soggy session it's been raining and storming on and off. I think they have a plastic palm in the shopping centre that might do as a substitute.  :dunno
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline trek97

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Re: 87 K75C injectors
« Reply #230 on: March 14, 2017, 07:12:02 AM »

I also read there is a fine screen inside each one.  So tonight I am gonna try to shoot some cleaner through backwards to flush the screen backwash style. 


As it seems I am determined to burn down the place. 
  • Illinois
  • 87 K75C

Offline The Dude

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Re: 87 K75C injectors
« Reply #231 on: March 14, 2017, 02:09:02 PM »
Rats Laitch you mean I don't have the right to self incineration, I might have to emigrate.  :dunno :musicboohoo:
Not emigrate,immolate.
Vaporized fuel can be such fun.
Hahahah!
  • Auckland, New Zealand
  • K75s
Current.
TR6R 1973 from new.
Moto guzzi 850 III .1983 from,almost, new.
K75S 1986 from new.vin-0103141
On my second millionth km.give or take a hundred k Kay's.
"The Dude abides. I don't know about you but I take comfort in that. It's good knowin' he's out there."
All the best!

Offline trek97

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Re: 87 K75C injectors
« Reply #232 on: March 14, 2017, 07:37:48 PM »

I found I had to hold the stem onto the injector.  But, was able to backwash them.
 



Comparison shot.  Really doesnt do it justice, can was new on the starting shot, pretty low on pressure for the final shot.
But you should easily see a difference.






As luck would have it O-rings, grommets, vac hose and new brackets arrived from bobsbmw.


New fuel line should arrive by weeks end.





  • Illinois
  • 87 K75C

Offline trek97

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Re: 87 K75C injectors
« Reply #233 on: March 21, 2017, 05:23:28 AM »
  • Illinois
  • 87 K75C

Offline The Mighty Gryphon

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Re: 87 K75C injectors
« Reply #234 on: March 21, 2017, 01:31:40 PM »
That Gastester is a great tool.  I couldn't find anyone who would set the idle mixture per the BMW CO spec of 1.5% for less than $125 and an hour on a dyno. 

Bought mine from the U.K. for $129 shipped.  This posting is an even better deal. 

The CO pot on my RS was off by about 5% too rich.  My K75RT was about 3% too rich.  Was getting black plugs before, now they are reading correct, nice and tan.  Couldn't have gotten the mixture correct as easily without it.  The alternative was to make an adjustment take a plug reading, repeat, repeat, repeat...
  • 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 Martin

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Re: 87 K75C injectors
« Reply #235 on: March 21, 2017, 01:42:14 PM »

I've had mine for about 18 years, treat it with care, don't lend it out, be patient when using it and follow the instructions. One of my best buys although I think I paid about $300.00 AU from the UK. Other good tools when dealing with Bricks are a laser temperature gun, and a set of vacuum gauges.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline trek97

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Re: 87 K75C injectors
« Reply #236 on: March 21, 2017, 05:17:33 PM »
Thanks guys.
yep already got set of 4 vac gauges.
And a non contact thermometer.
So pretty much just waiting to hear from my buddy about the paint...he's got my tank.
  • Illinois
  • 87 K75C

Offline trek97

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Re: 87 K75C injectors
« Reply #237 on: March 22, 2017, 06:22:29 AM »
That Gastester is a great tool.  I couldn't find anyone who would set the idle mixture per the BMW CO spec of 1.5% for less than $125 and an hour on a dyno. 



Hey TMG, I thought I read it was to be set up at 2% ?  Is 1.5 best in your experience?


From pg 13-09 BMW repair manual


  • Illinois
  • 87 K75C

Offline The Mighty Gryphon

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Re: 87 K75C injectors
« Reply #238 on: March 22, 2017, 08:40:52 AM »
I went for the lean end of the spec.
  • 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 trek97

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Re: 87 K75C injectors
« Reply #239 on: March 22, 2017, 01:11:03 PM »
I went for the lean end of the spec.


Long as I don't get any hesitation on take off.  I will plan to shoot for the same.
  • Illinois
  • 87 K75C

Offline trek97

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Re: 87 K75C injectors
« Reply #240 on: March 25, 2017, 04:40:12 PM »
Has anyone done the plate mod to make it possible to check timing w a strobe on #3 plug?

Holy cow the Gunson arrived in record time.








  • Illinois
  • 87 K75C

Offline Martin

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Re: 87 K75C injectors
« Reply #241 on: March 25, 2017, 05:52:12 PM »

For best results with the Gunson be patient, setting up is extremely important, give it time to settle. Allow time between  small adjustments for it to settle otherwise you will be chasing your tail. Important, if you need to rev the bike at any stage remove the probe. And after use you must allow adequate time for it to purge. Also due to it's light weight build treat it with care, don't drop it and don't lend it. If a mate wants to borrow it, tell him you'll do the job for him. I've had stuff broken by people who didn't treat tools with adequate care. Mine is now 18 years old and is still going strong it should serve you for a long time.
Regards Martin.

  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline trek97

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87 K75C Anyone done the timing light mod?
« Reply #242 on: March 25, 2017, 06:10:07 PM »
Thanks Martin,  I read through the book already and will read it a couple more times just to be clear on the complete process before starting.


Whenever that happens.  My paint buddies wife had internal bleeding for no apparent reason and they rushed her for surgery two weeks ago.


She just got out of the hospital.  I havent contacted him other than to make sure all is well w her. 


So, I have no idea when the tank will be here. 


Pretty much just hunting info, cleaning and looking for things to mess with. 
  • Illinois
  • 87 K75C

Offline trek97

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Re: 87 K75C Anyone done the timing light mod?
« Reply #243 on: March 25, 2017, 07:00:11 PM »
Have you done timing light mod?  If not, how are you checking timing without BMW tools?
  • Illinois
  • 87 K75C

Offline Laitch

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Re: 87 K75C injectors
« Reply #244 on: March 25, 2017, 07:16:38 PM »
Has anyone done the plate mod to make it possible to check timing w a strobe on #3 plug?
Are you referring to the mod done by Rob Lentini described here but he doesn't count as having done it?  :giggles
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Martin

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Re: 87 K75C Anyone done the timing light mod?
« Reply #245 on: March 25, 2017, 07:57:10 PM »

I've thought about doing it, maybe one day when I get bored. You guys subjected to snow have more time to tinker, although we have a cyclone approaching and weather here last week was pretty wet.  :riding:
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline trek97

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87 K75C Anyone done the timing light mod?
« Reply #246 on: March 25, 2017, 08:17:22 PM »
Are you referring to the mod done by Rob Lentini described here but he doesn't count as having done it?  :giggles


Thats the one.  Just curious how its worked out for others? 
Also, it would sure be nice to find a few pics to go along w the write up.  For us guys who have never even cracked the cover open.
  • Illinois
  • 87 K75C

Offline trek97

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Re: 87 K75C Anyone done the timing light mod?
« Reply #247 on: March 25, 2017, 08:19:38 PM »
I've thought about doing it, maybe one day when I get bored. You guys subjected to snow have more time to tinker, although we have a cyclone approaching and weather here last week was pretty wet.  :riding:
Regards Martin.


I feel your pain bro. 
  • Illinois
  • 87 K75C

Offline trek97

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Re: 87 K75C Anyone done the timing light mod?
« Reply #248 on: March 26, 2017, 04:13:23 AM »
OK done a bunch more reading about timing the thing.  Im not messing w it.   :riding:

If it aint broke...RIDE IT
  • Illinois
  • 87 K75C

Offline Laitch

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Re: 87 K75C Anyone done the timing light mod?
« Reply #249 on: March 26, 2017, 05:57:02 AM »
If it aint broke...RIDE IT  :riding:
:2thumbup:
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

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