Will Not Start

[NMPete]

Hi everyone - I am at my wit's end and discouraged. I have spent numerous hours on the Forum search (lots of good advice) and at least 10 hours in the shop doing testing (using the K100 Forum troubleshooting starting guide - an amazing write-up!).
I bought a K75C that had been in storage for over 10 years and am trying to get it to start. It is in overall good condition, and the wiring, connectors, etc., are not corroded.
Problem seems like no fuel getting into the cylinders after cranking with the handlebar start switch on and the clutch handle tied in.
Here is what I have done and my testing notes:
- Good compression in all 3 cylinders
- Starter works fine
- New fuel pump and filter work fine (about 72 PSI at tank and 36 PSI at fuel rail) and re-circulation is good.
- Good strong  spark on all 3 plugs
- Injector test good at 16 ohms
- Bosch FI Control unit (it looks clean, no corrosion or indication of overheating):
-- Have current to #9 with the starter going
-- Ground from #12 to fuel injector “0” ohms on one pin and about 8.5 ohms on the other pin
-- 190 ohms between 8 & 9 pin
- Pulled out relays and the air flow big connector and all looks good

It cranks up nicely, good fuel pressure, and good spark, but appears no fuel in the cylinders.

Any suggestions?

Many thanks
New Mexico Pete
 

[The Mighty Gryphon]

sounds like you have most of what you need to get the engine running except for fuel.

Have you done anything to clean the varnish out of the fuel injectors?  There are videos on YouTube that show how to do it.  You might want to send them out to a fuel injector shop.  There are several that members here recommend.

[NMPete]

I have not removed the injectors yet, but can do that.
After removal, is there a way I can test to see if they are completely plugged?

Thanks

[The Mighty Gryphon]

There are kits on eBay for flushing injectors with carb cleaner.  They let you power the injector open and shoot the cleaner through it. 

https://www.ebay.com/itm/365450678494?

You can also get the filter screens, o-rings and pintle caps at the local auto parts store to replace the old parts.

[Laitch]

The rail is removed with the injectors attached. Point them into an empty drywall bucket and crank the engine. If you have a history of inadvertent fire-starting, don't do this.
 
Do the injectors click—or light a noid lamp—when the engine is being cranked? Are both terminal 87 and 87b of the fuel injection activated during cranking?

[NMPete]

Got the injectors out - They look awful!

Decided to order new ($56 each) vs cleaning ($30 each).  Should get them next week and will add to this Post the results.