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To close this loop. 

I ended up pulling off the ABS system, getting some stainless/braided lines made up.  I still had problems pulling brake fluid through the rear so I swapped out the MC with the cheap Chinese universal as [described here][/https://www.motobrick.com/index.php?topic=9364.0].  Bled the rear and will give it a shake down ride tomorrow.  Thanks for the help.
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The Motobrick Workshop / 1992 K75 RT headlight bulb replacement.
« Last post by jiggseob on July 23, 2024, 11:48:26 PM »
My K75 low beam does not work, the place to start is the bulb.  Took off the inner liner of the fairing to get access to the back of the bulb.

Turns out the rubber boot across the back of the headlight housing is impossible to put on or get off, because the brackets holding the big upper fairing are tight to the headlight housing and not allowing space to remove or install that rubber boot.  The "gap" at the red arrow in the photo is about 1mm or less than 1/10".  Not able to work that rubber boot through that small gap.

This fairing - and its bracketing - is unique to the RT sub-model.  A question for anyone who has changed a headlight bulb in an RT:   Is something on my bike bent? Or is that the way they all are?  It will be almost impossible to get that rubber boot past that tiny gap and around the bottom of the bulb-opening in the back of the headlight housing.  This fairing mount bracket being somewhat bent would explain why I had such a Bart-Simpson of a time getting the mount points to line up on the fairing lowers and the radiator cowling.

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Very nice specimen. Will be interested to see what it goes for. Gotta be worth at least 10k, hope you get at least that
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The Motobrick Workshop / adjusting fuel sending unit for external fuel gauge
« Last post by cduvll on July 23, 2024, 08:45:42 PM »
I installed a fuel gauge but it doesn't reflect the true amount of fuel. Adjust the fuel sending unit wheel ?
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The Motobrick Workshop / Re: Crankcase Breather Hose, Now Fuel Pump
« Last post by sooprvylyn on July 23, 2024, 08:16:14 PM »
I'd also double check the wires going to the pump terminals are tight since you've been in there messing w things.
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The Motobrick Workshop / Re: What Did You Did To Your Motobrick Today ?
« Last post by MIbrick on July 23, 2024, 07:01:07 PM »
Not today, but over the last week:

* troubleshoot issue with temp gauge blowing Fuse #1 (many, many thanks to @TheMightyGriffon for his incredible support), including measuring resistance at temp sender (good)
* repaired my 'spare' temp gauge (center wire busted off ring terminal) and put that in place of the shorted temp gauge (fuse blowing problem solved)
* as long as the lower and belly fairings, fairing pads and seat were stripped, installed new light weight battery, pulled cylinder head cover and checked valve lash (all good!)
* changed all fluid and filters
* reinstalled all the various fiberglass bits and seat
* discovered the clutch pack was seized, so busted that loose doing the "5th gear + aggressively rocking" maneuver
* fresh gas + techron
* changed batteries in Fobo TPM thingies and aired up tires

Just waiting for this freaking rain to go away and I'll take her for a rip.
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The Motobrick Workshop / Re: Crankcase Breather Hose, Now Fuel Pump
« Last post by MIbrick on July 23, 2024, 06:56:09 PM »
Don't know what minimum voltage is for the fuel pump, but have you run Deoxit over the harness connector for the tank (and everything else while you're at it)? I mean, first thing I'd check is I didn't forget to reconnect the tank harness, but that's me knowing how I do things sometimes (get the big, hard stuff done, miss the small easy stuff).
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The Motobrick Workshop / Crankcase Breather Hose, Now Fuel Pump
« Last post by rocketbrick on July 23, 2024, 03:17:53 PM »
Hey crew,

My frustrations with this 1993 K75S seem to be endless. I had it running last month after swapping in some extra fuel injectors to get the bike running after bringing it up from North Carolina, where it had sat for 4 years in a trailer. I cleaned all the degraded rubber in the tank as a starting point.

I also replaced:
- Fuel pump/screen
- Fuel filter
- Fuel lines, in and outside tank
- Fuel injectors
- All brake lines (unrelated to fuel system)
- Crankcase breather hose

So anyway, the bike was running pretty sluggish, not revving over 3000RPM. I noticed and swapped the injectors back to the newly-cleaned Bosch ones, which made the bike run incredibly, when the same issue appeared last Friday. I noticed the crankcase breather hose was torn, so I put on a brand new one.

After that, I cleaned the injectors again, cleaned out the tank once more, put new lines on everything, including both ends of the fuel rail and the return line on the tank. And after that, I start everything up, and BAM - no fuel pump whine on ignition stab. It worked maybe two days ago, I'm not sure what's going on with it. Does it need a certain voltage to run? I'm charging the battery but I thought I'd ask in the meantime.

Thanks in advance!
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Well you have hit $4K and some nice comments. Hopefully the last day brings up some serious bidding :)
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