Author Topic: '95 K75 smoking  (Read 4833 times)

Offline andrej_gr

  • Motobrick Curious
  • Posts: 13
'95 K75 smoking
« on: September 14, 2018, 09:03:58 PM »
G'day everyone.

I've read that this is a common thing for older K's to smoke for a while after being left on a side stand for longer time. However my bike is '95 and just want to double check if I'm having the same issue.

So I haven't ridden the bike much since I bought it, cause was busy stripping it down, rewiring etc. Today I started it first time after over a month. It was sitting on the side stand all the time. Starts flawlessly, but white smoke starts coming out after ~20s. Here is video when idling, smokes more when throttling: https://www.youtube.com/edit?o=U&video_id=JbWcltPksu4

Light smoke also keeps coming for some time after stopping. And it also comes from somewhere underneath the bike (hole in exhaust?): https://www.youtube.com/edit?o=U&video_id=NTknaVkCaAw

Only rode it a few hundreds meters today and turned back.

Any thoughts? Or is it the same "leaving on side stand for a while" issue and it will clean up after a proper ride?

Cheers
  • Sydney, Australia
  • K75

Offline The Mighty Gryphon

  • Administrator
  • ^ Quintessential Motobricker
  • Posts: 6843
Re: '95 K75 smoking
« Reply #1 on: September 14, 2018, 09:08:01 PM »
I guessing it's just the old sidestand insect fogger.  The oil is probably between the oil control and the compression rings and takes a bit of running to work it's way into the cylinder where it is turned into smoke.  Sometimes takes a minute or two to burn it all off.
  • 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 caveman

  • ^ Proficient Motobricker
  • Posts: 215
Re: '95 K75 smoking
« Reply #2 on: September 14, 2018, 09:18:46 PM »
Smoke'm if ya got'm!
I think it would do it some good to run a few gallons of fuel though the old rig.
  • Kennerdell, PA.
  • 87 K100RT, 88 K100LT

Offline franck

  • Motobrick Curious
  • Posts: 35
Re: '95 K75 smoking
« Reply #3 on: September 15, 2018, 08:44:44 AM »
I revived my 1985 k75 about four years ago  - on first start up the clouds of exhaust were impressive.  After talking to a few K bike riders I learnt not to leave the bike on the side stand - when I park up I put the bike onto the centre stand and then kill the motor.  When I leave I start up on the centre stand etc....  there is a great reduction in the cloud of smoke.  (the other option is to make a quick getaway!)  The engine configuration is famous for oil seeping past the piston rings but I am sure others more knowledgeable can tell you more about that. 
  • France
  • K75C

Offline mw074

  • ^ Proficient Motobricker
  • Posts: 452
Re: '95 K75 smoking
« Reply #4 on: September 15, 2018, 11:51:27 AM »
I had a '88 LT ( brown fudge-cycle ) that smoked when it felt like it no matter what I tried. I took more than my fair share of ribbing from the Harley crowd. It would quit smoking after 3 or 4 minutes of running. I just got used to it.
  • Michigan

Offline K1300S

  • ^ Quintessential Motobricker
  • Posts: 1293
Re: '95 K75 smoking
« Reply #5 on: September 15, 2018, 12:44:20 PM »
I revived my 1985 k75 about four years ago  - on first start up the clouds of exhaust were impressive.  After talking to a few K bike riders I learnt not to leave the bike on the side stand - when I park up I put the bike onto the centre stand and then kill the motor.  When I leave I start up on the centre stand etc....  there is a great reduction in the cloud of smoke.  (the other option is to make a quick getaway!)  The engine configuration is famous for oil seeping past the piston rings but I am sure others more knowledgeable can tell you more about that. 

this.

leave it on the center stand....
Project Thread "K75s Midlife Refresh"
http://www.motobrick.com/index.php/topic,7810.0.html

Offline andrej_gr

  • Motobrick Curious
  • Posts: 13
Re: '95 K75 smoking
« Reply #6 on: September 17, 2018, 08:46:06 PM »
So took it for a longer spin and the smoke was gone in a few kms. Thanks everyone!
  • Sydney, Australia
  • K75

Offline natalena

  • ^ SuperNatural Motobricker
  • Posts: 742
Re: '95 K75 smoking
« Reply #7 on: September 18, 2018, 04:14:35 PM »
Was at the bike shop, when I started the K and had coughs of smoke that prompted a quick exit. Embarrassed that I looked like an Africa Corps tank billowing a smoke screen across a battlefield, things got worse when the traffic light turned red! Still spewing residual clouds of smoke, a car pulled up in the lane next to me, the driver laughing and yelled out "It's a bitch, all bricks smoke. Use your center stand." I just shook my head and laughed.
  • MST
  • 1987 K75s #0919, '05 Sportster 1200C, '21 ARGO 8x8, '24 KLR650
"Hard to beat a 10x beaver, 'specially if you're gonna work it."

Offline The Mighty Gryphon

  • Administrator
  • ^ Quintessential Motobricker
  • Posts: 6843
Re: '95 K75 smoking
« Reply #8 on: September 18, 2018, 08:24:43 PM »
Did the bike sit idle before you got it?  How long?  It's possible the rings are stuck.  They were in my K100RS.  I dumped a bottle of Marvel Mystery Oil in the crankcase and the new owner reports that after about 1,000 miles both smoking and oil consumption have been drastically reduced.
  • 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"

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