Author Topic: k75 wont turn over  (Read 3692 times)

Offline jbmccarthy

  • Curious
  • Posts: 9
k75 wont turn over
« on: October 23, 2014, 06:26:29 PM »
Hey guys,

ive got a k75 that until a couple of days ago ran alright, but now wont start. I had an incident the day before yesterday where I took her out for a spin, but at a stop light she just died on me. The bike would turn over but it didnt seem like there was a spark. After getting off the bike I saw that the oil indicator was completely dried up, which I thought was weird because I remembered having plenty of oil before i set off. One of the exhaust headers was coated in oil from a weep that had been in the works for a few weeks but i didnt think much of it, and thought there was no way it could have drained the whole thing. Nonetheless, I put two more quarts in after i broke down and sure enough she fired right up and i rode it home. The next day, however i go to start her and...nothing. I push the starter button and hear a "click" and then the whine of the fuel pump but thats it. I looked down at the oil indicator and it was completely black at this point, so i went ahead and drained the oil and put two more quarts but to no avail. As a frustrated newbie im tempted to bring it into the shop, but my wallet and my ego wont let me do that without first seeing if i can figure it out myself. Any thoughts on where to start? Any help is appreciated, but bear in mind that youre talking to someone with very limited experience in the area so I'd appreciate it if you guys could dumb it down :) 

Thanks again,
Jack
1992 K75S

Offline kioolt

  • ^ Proficient Motobricker
  • Posts: 237
Re: k75 wont turn over
« Reply #1 on: October 23, 2014, 07:00:10 PM »
If you drained it, it will take 4 quarts of oil to bring it back up to the correct level.
2018 R1200RT 8,000 miles,2004 R1150RT 189,000 miles
1991 K100LT 128,700 miles,1982 R100RT 106,900 miles
The cheapest thing on a BMW is the nut that connects the seat to the handlebars.

Offline Scott_

  • Administrator
  • ^ Quintessential Motobricker
  • Posts: 2242
Re: k75 wont turn over
« Reply #2 on: October 23, 2014, 07:04:11 PM »
I'd make the suggestion of using some electrical contact spray and clean up the electrical connections/contacts for the ignition switch, kill switch, the engine controller plug, and any/all of the ground connections.
  • My Garage
1995 K1100LT 0302044
2017 FLHTK Ultra Limited
1997 K1100LT 0302488 (R.I.P.)
1997 R1100RT ZC62149(sold)
"One who does not ask questions is ashamed to learn" Danish proverb

Offline Motorhobo

  • +25 years of K75
  • ^ Quintessential Motobricker
  • Posts: 1530
Re: k75 wont turn over
« Reply #3 on: October 24, 2014, 06:03:06 AM »
Make sure you don't overfill the oil -- over or under filling won't affect whether it starts but will damage the engine if it does run for any length of time. Make sure your battery can produce enough current to turn the engine over consistently. I recently had a situation where the battery was reading 12.6 volts but had no cold cranking amps, so it would just click and not turn the engine over. If this is a new-to-you bike, it's worth the peace of mind to pull the battery and have it tested at autozone or wherever, unless you have a means to test it properly yourself.

Next time it doesn't start, note whether headlights, indicator lights, and any other power systems are on, all those clues can help with diagnosis. I agree with Scott that the most likely suspect would be the big connector at the ECU under the seat. It's fickle, there are a lot of connection points and sometime just needs to be unplugged  and plugged back in periodically.
1994/1995 K75 ABS Frankenbike: original engine 136k miles, frame from Gary Weaver (RIP), 173k miles -- Current Odometer: 198k miles
1994 K75 since 2013, 82,000 mi (19k mine) w/California Sidecar Friendship II Sidecar & Black Lab 'Miss B' - RIP

Past: 1974 Honda 550/4 (first bike), 1994 K75 (sold), 1995 K75 ABS (parts bike), Sidecar Dog & Best Bud 'Bo' - RIP

Offline jbmccarthy

  • Curious
  • Posts: 9
Re: k75 wont turn over
« Reply #4 on: October 24, 2014, 08:05:29 PM »
Thanks for the input guys, i look forward to trying out your suggestions this weekend
1992 K75S

Tags: