Author Topic: This Is The EPIC Soggs 92K75 MAGA Thread  (Read 178883 times)

Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #225 on: January 19, 2019, 10:40:23 AM »
Hi. Is the sensor,the small round object that is hanging down in the mouth of the air flow box? Or rather, the silver unit, I meant to say.
You want to use a light touch with a dowel to push the vane in the opening of the sensor assembly—silver unit—to determine if it moves freely. This is among the last places to be checking for performance. Other tests on it can be done with the engine running, but your engine apparently doesn't do that very well.

You're out of your depth, in fact, many of us are out of our depths with that thing. rbm is right at home though. For him, it's probably as complicated as making tea. You, on the other hand, are right on the cusp of creating more difficulty for yourself.

I think you need to check the basics first. Are the valves set correctly; do the cylinders have sufficient compression?
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Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #226 on: January 19, 2019, 11:03:06 AM »
When I replace the driveshaft I orient it so the universal joint can only swing left-right, not up-down, to improve the chance of keeping the pieces parallel.
Can one of the orderlies or nurses at this institution help me understand what daveson is explaining here? Is it about flux capacitors. or Vegematics?
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #227 on: January 19, 2019, 11:24:27 AM »
Can one of the orderlies or nurses at this institution help me understand what daveson is explaining here? Is it about flux capacitors. or Vegematics?
quite simply the orientation of the driveshaft before you line it up to the final drive,I would imagine.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #228 on: January 19, 2019, 11:26:41 AM »
You want to use a light touch with a dowel to push the vane in the opening of the sensor assembly—silver unit—to determine if it moves freely. This is among the last places to be checking for performance. Other tests on it can be done with the engine running, but your engine yapparently doesn't do that very well.

You're out of your depth, in fact, many of us are out of our depths with that thing. rbm is right at home though. For him, it's probably as complicated as making tea. You, on the other hand, are right on the cusp of creating more difficulty for yourself.

I think you need to check the basics first. Are the valves set correctly; do the cylinders have sufficient compression?
yes, it moves freely. I know you can improve the bikes performance if you take the angled black lid off and move the toothed cog 5 teeth, clockwise, apparently.
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Offline The Mighty Gryphon

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #229 on: January 19, 2019, 11:28:42 AM »
+1 on what Laitch has said.  The MAF is pretty delicate and has a very precise resistance element in it.  Beyond making sure the door inside the throat moves freely and the connector is clean there isn't anything in there that I would want to mess with. 

In the throat there is a small wire thingy.  DON"T TOUCH IT!!!  It's the air temperature sensor and is critical to having the correct mixture.

Concentrate on getting the valves checked, doing a compression test, getting proper fuel delivery, and cleaning all the electrical connections.  As long as the door moves freely the chances are excellent that the MAF is good. 

If the bike has been sitting for a long time I wouldn't be surprised that the rings are stuck and limiting compression.  They will need to be freed up.  I would suggest putting a couple cc's of a solvent like Seafoam in the cylinders and turning the engine over to work it around the pistons.  Do that a couple times and let the engine sit to allow the solvent to soak on the rings.

If you can get it in England, I would recommend using Marvel Mystery Oil as the solvent to free up the rings.  The stuff really works, and cured an oil consumption problem in my K100RS.  A half quart in the engine oil, a couple cc's in the cylinders and the balance in the fuel tank.  Crank the engine over with the plugs out and let it sit for a few days.  Then run it a bit each day for a week or so, and then take some rides.  Depending on how bad the rings are it may take a few miles to see real results.  On my bike it took about 2-300 miles to completely free up the oil control rings.
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Offline The Mighty Gryphon

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #230 on: January 19, 2019, 11:35:45 AM »
yes, it moves freely. I know you can improve the bikes performance if you take the angled black lid off and move the toothed cog 5 teeth, clockwise, apparently.

If you start fecking with the insides of the MAF you will not get any additional help with running problems from most of us here.  You will be creating problems we can't fix.  That cog moving only works(?) in Oklahoma.

Don't lubricate the door.  The lube will dry out and definitely make it's operation sticky.
  • 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 Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #231 on: January 19, 2019, 12:32:12 PM »
If you start fecking with the insides of the MAF you will not get any additional help with running problems from most of us here.  You will be creating problems we can't fix.  That cog moving only works(?) in Oklahoma.

Don't lubricate the door.  The lube will dry out and definitely make it's operation sticky.
Yes, I understand. Basically, I just pushed it with my finger. Seems ok and moves.And the cog moving thing, don’t worry, I’m not gonna touch it! Far to complicated!Anyway, borrowed a compression Guate and the reading goes as this. No 1 = 160psi, No 2 = 155 or there abouts psi and no.3 160psi.
I tried them all again, but the battery was getting flat, so they all read a bit lower. And we don’t have sea foam in England.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #232 on: January 19, 2019, 12:34:13 PM »
Can you post a photo of the CX after you modified it?
sure
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #233 on: January 19, 2019, 12:54:57 PM »
Yes, I understand. Basically, I just pushed it with my finger. Seems ok and moves.And the cog moving thing, don’t worry, I’m not gonna touch it! Far to complicated!Anyway, borrowed a compression Guate and the reading goes as this. No 1 = 160psi, No 2 = 155 or there abouts psi and no.3 160psi.
I tried them all again, but the battery was getting flat, so they all read a bit lower. And we don’t have sea foam in England.
Ah, on inspection, I CAN get seafoam and mystery oil on eBay.cool.
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Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #234 on: January 19, 2019, 01:39:01 PM »
Can one of the orderlies or nurses at this institution help me understand what daveson is explaining here? Is it about flux capacitors. or Vegematics?
. . . quite simply the orientation of the driveshaft before you line it up to the final drive,I would imagine.
You aren't an orderly or a nurse here. You're a patient. Don't let your imagination run wild. :giggles
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #235 on: January 19, 2019, 01:59:00 PM »
You aren't an orderly or a nurse here. You're a patient. Don't let your imagination run wild. :giggles
true enough, I’ll get back into bed...




NURSE.........!
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Offline rbm

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #236 on: January 19, 2019, 02:32:47 PM »
quite simply the orientation of the driveshaft before you line it up to the final drive,I would imagine.
I don't think you can align a single U-joint on a monolever drive so that it is "in phase ".  It would raise the question "In phase with what?".  The sliding splines on the final drive is what absorbs the non-linear rotational velocity imparted to the drive shaft by the Ujoint.

It is necessary and recommended to phase U-joints in a K100-16V / K1100 which uses a paralever drive to ensure the constant velocity at the input driven end exactly transfers to the output drive end.  See this excellent video for more information:  https://www.facebook.com/ScottTuningFork/videos/831883586937318/?t=159
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Offline The Mighty Gryphon

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #237 on: January 19, 2019, 02:35:33 PM »
Your compression is good!

Regarding u-joint orientation.  By installing the drive shaft with the u-joint caps in the shaft vertical, the weight that causes the joint to droop is minimized.  I inadvertently discovered this a whille back when doing spline lubes and the shaft on my yellow bike kept drooping when I tried to install it. I shall remember this when I come to put mine back in.
  • 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 Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #238 on: January 19, 2019, 02:53:45 PM »
By installing the drive shaft with the u-joint caps in the shaft vertical, the weight that causes the joint to droop is minimized.  I inadvertently discovered this a whille back when doing spline lubes and the shaft on my yellow bike kept drooping when I tried to install it.
Thank you, nurse. That is clarifying. I haven't had that difficulty yet. I only have one moto so the opportunity for drooping-shaft syndrome has only presented itself a couple of times but wasn't encountered. Maybe light gravity was ruling on those days. I do understand that manual treatment is an often-used remedy.  :bmwsmile
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #239 on: January 19, 2019, 03:26:46 PM »
Thank you, nurse. That is clarifying. I haven't had that difficulty yet. I only have one moto so the opportunity for drooping-shaft syndrome has only presented itself a couple of times but wasn't encountered. Maybe light gravity was ruling on those days. I do understand that manual treatment is an often-used remedy.  :bmwsmile
i would imagine that it’s even easier to line everything up if you turn the shaft so that the ‘cross’ in the shaft is diaganol to eliminate side to side and up and down movement.
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Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #240 on: January 19, 2019, 03:32:29 PM »
i would imagine that it’s even easier to line everything up if you turn the shaft so that the ‘cross’ in the shaft is diaganol to eliminate side to side and up and down movement.
There you go again. :giggles
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Offline szabgab

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #241 on: January 19, 2019, 03:50:43 PM »
It looked like his when I got it. I really wanted to do something different with it,but I'll leave the BMW as it is.

Oh yes... I giggled a tad, when we had this discussion about K bikes being turned into bobbers, scramblers, cafe racers and I realised, you have made one of the nicest bikes of the 80s into just such a thing :) Fortunately tastes are all different, even if I was very actively searching for a CX in such a nice original condition for a VERY long time as they are getting rare and expensive. 600GBP for the two bikes? Man, I need such a neighbour :))) If he would have a CX500 Turbo in his garage collecting dust, just let me know, and I'd collect it tomorrow. Well, I might even splash out on such a bike and pay double, what you paid for your bikes :)
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #242 on: January 19, 2019, 04:29:05 PM »
Oh yes... I giggled a tad, when we had this discussion about K bikes being turned into bobbers, scramblers, cafe racers and I realised, you have made one of the nicest bikes of the 80s into just such a thing :) Fortunately tastes are all different, even if I was very actively searching for a CX in such a nice original condition for a VERY long time as they are getting rare and expensive. 600GBP for the two bikes? Man, I need such a neighbour :))) If he would have a CX500 Turbo in his garage collecting dust, just let me know, and I'd collect it tomorrow. Well, I might even splash out on such a bike and pay double, what you paid for your bikes :)
yes.  It ironically, I have kept all the bits and it could easily be turned back to its original state.The only ‘drastic’ change I made, was to cut 8” off the back of the frame to shorten it. It can simply be added back on using two 2” lugs in the frame ends.So it’s far from ruined, it’s just dressed differently.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #243 on: January 19, 2019, 04:41:52 PM »
You want to use a light touch with a dowel to push the vane in the opening of the sensor assembly—silver unit—to determine if it moves freely. This is among the last places to be checking for performance. Other tests on it can be done with the engine running, but your engine apparently doesn't do that very well.

You're out of your depth, in fact, many of us are out of our depths with that thing. rbm is right at home though. For him, it's probably as complicated as making tea. You, on the other hand, are right on the cusp of creating more difficulty for yourself.

I think you need to check the basics first. Are the valves set correctly; do the cylinders have sufficient compression?
dosnt ‘out Of you depth’ mean starting to learn, when it comes to something you don’t know about?
I just would like to learn. This is my 8th bike now, but my first with fuel injection, and it’s good to learn about new things,isn’t it?
I’d like to get a spare one of these and rip it apart just to see how it works,tbh, but not this one as it’s the only one I have. I’m just that sort of inquisitive person,that’s all.
My father used to tell me that there’s not much point in living if you don’t try and learn something new.
Know what I mean? I read the link about the jetronic unit, but I’m more ‘hands on’.
I find learning easier,that way.
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Offline Soggz

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #244 on: January 19, 2019, 04:50:08 PM »
There you go again. :giggles
sorry.
Meds’ havnt quite kicked in yet...
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Offline szabgab

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #245 on: January 19, 2019, 04:53:59 PM »
yes.  It ironically, I have kept all the bits and it could easily be turned back to its original state.The only ‘drastic’ change I made, was to cut 8” off the back of the frame to shorten it. It can simply be added back on using two 2” lugs in the frame ends.So it’s far from ruined, it’s just dressed differently.

Soggz, it is not ruined... As I said before, tastes are all different fortunately. It was just funny, how I and others banged on about them cafe folks to you :) Keep on to those bits. I might just one day buy a cafe'd CX and turn it back to factory standard :D
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Offline Martin

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #246 on: January 19, 2019, 04:59:55 PM »
Sometimes learning something new can prove either expensive, painful or both. Hence the saying look before you leap or wear a parachute.    :laughing-on-ground:
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Offline szabgab

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #247 on: January 19, 2019, 05:02:25 PM »
dosnt ‘out Of you depth’ mean starting to learn, when it comes to something you don’t know about?
I just would like to learn. This is my 8th bike now, but my first with fuel injection, and it’s good to learn about new things,isn’t it?
I’d like to get a spare one of these and rip it apart just to see how it works,tbh, but not this one as it’s the only one I have. I’m just that sort of inquisitive person,that’s all.
My father used to tell me that there’s not much point in living if you don’t try and learn something new.
Know what I mean? I read the link about the jetronic unit, but I’m more ‘hands on’.
I find learning easier,that way.

Soggz, don't take it personal, I have been told not to do things many-many times and I did them anyway. Sometimes it turned out to be OK, other times I ruined the whole thing and had to start anew. With the MAF there is a special MAF cleaner, you can get, and you can hose down the inside, as it is a mild abrasive, that would not damage the sensitive parts. Otherwise do, what I did, use contact cleaner sparingly, do not, at any circumstance touch the temp sensor. Some remove the black plastic cover to clean the insides of the MAF sensor, I am not sure it necessary, unless you know, something is not right there.

Oh BTW, check for air leaks. They can, as with carbed bikes upset the right fuel-air balance and the computer might try to balance for that, or you might run too lean, etc. Use carb cleaner with a long straw and direct the spray to specific parts - throttle body rubbers above and below the bodies, little vacuum caps, vacuum hose to pressure regulator, injectors, the z shaped hose, you have repaired even that big elbow going from the air box to the collector
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Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #248 on: January 19, 2019, 05:10:32 PM »
dosnt ‘out Of you depth’ mean starting to learn, when it comes to something you don’t know about?
No. It means taking an action without sufficient knowledge or skill to complete it successfully, then drowning or needing rescue.
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Offline Laitch

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Re: This Is The EPIC Soggs 92K75 MAGA Thread
« Reply #249 on: January 19, 2019, 05:18:11 PM »
Soggz, don't take it personal, I have been told not to do things many-many times and I did them anyway.
I learn from the mistakes of others and appreciate that their hubris benefits me. The Internet has made that convenient indeed and has allowed more of my money to be available for riding and profiterole consumption. I also respect experience, but then I have nothing left to prove, if I ever had anything in the first place. :giggles
  • Along the Ridley in Vermont.
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