K11 Owners Group Forum Index K11 Owners Group
K11 Owners Group
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

slight smoke on startup

 
Post new topic   Reply to topic    K11 Owners Group Forum Index -> Tech
View previous topic :: View next topic  
Author Message
a330us



Joined: 25 Feb 2016
Posts: 7
Location: winston salem, nc usa

PostPosted: Thu Dec 14, 2017 11:30 pm    Post subject: slight smoke on startup Reply with quote

Picked up a 94 K11RS from original owner several months ago with only 6500 miles on it and beautiful condition. It had been sitting for several years so did a complete service on it except splines. It even had original tires which were replaced of course and never smoked at all with the few hundred miles I put on it. I let it sit for 3 months or so and started right up but smoked some for 3 0r 4 minutes before it stopped. It's kind of a light gray and smells a little rich or oily perhaps.
When I open the gas cap I get a whoosing sound like a suction is holding the cap closed, is that normal or do I have a vent problem ? It runs great and oh yes, the bike is always parked on the center stand. Any suggestions on what is going on would be great. Thanks Arch.
_________________
2 bmw /2's
15 ducatis's, mostly paso types
1994 k1100rs
Back to top
View user's profile Send private message
N41EF
Flying Brick Rider


Joined: 23 Mar 2014
Posts: 406
Location: Aiken, SC

PostPosted: Thu Dec 14, 2017 11:37 pm    Post subject: Reply with quote

Does it do it every start up or just the first after the long sit? I'd be tempted to do an Italian tuneup and wring it out, let it sit overnight, and then see what happens.
_________________
2014 R1200RT Water Cooled
2001 R1100S Light
1993 K1100LT. Nissan Ice Blue.(Gone)
Back to top
View user's profile Send private message
a330us



Joined: 25 Feb 2016
Posts: 7
Location: winston salem, nc usa

PostPosted: Fri Dec 15, 2017 10:56 am    Post subject: Reply with quote

Yes it does, went for a hard 45 mile ride last time even ran it up to a hundred but next day still the same. Thanks Arch.
_________________
2 bmw /2's
15 ducatis's, mostly paso types
1994 k1100rs
Back to top
View user's profile Send private message
Sonu
Flying Brick Rider


Joined: 15 Jan 2004
Posts: 393
Location: San Jose, CA

PostPosted: Fri Dec 15, 2017 7:26 pm    Post subject: Reply with quote

Perfectly normal for K bikes.
If it bothers you try putting it on the center stand.

Sanjiv
_________________
1997 K1100LT "Ziggy" _GarminGPS_Corbin saddle_K Guards _Hyperlights_Fog lights_Eastern Beaver Relays_Cee Bailey_4"speakers_Michelin PR4's_MoS2_Spiegler lines_TPMS_VDO
Back to top
View user's profile Send private message
abreeze
Flying Brick Rider


Joined: 17 Jun 2006
Posts: 671
Location: atlanta

PostPosted: Sat Dec 16, 2017 11:02 am    Post subject: Reply with quote

sounds like oil burning off.

Do you use the side stand? if you do oil will get past the rings and smoke. A drop will take a few mins to burn off, so no big worry.

If it smokes every time you start. it could be a valve guide seal. Not much you can do to easily fix. requires head removal.

Its not a big deal unless its a total nuisance.. pulling the head is not the end of the world if needed. It can be done with the engine in the frame. and if you do it while adjusting the valves your halfway there!
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Jim
Site Admin


Joined: 17 May 2003
Posts: 3840
Location: WHERETHEFUNNEVERENDS

PostPosted: Sat Dec 16, 2017 5:48 pm    Post subject: Reply with quote

If you get a whoosh when opening the gas cap, there's something wrong.

Follow the crank case vent down toward the right side of the block, near the air filter box. If there is a gray check valve in that line, that's problematic - it gets stuck. It's a California thing, anyway.

Ideally, you'd install an air accumulator under the drain and tank vent nipples on the bottom of the tank, attach a section of hose to the accumulator, and run it down low somewhere on the right side of the bike.

You can search the forum for accumulator. Not sure what the part number is - if you want to order one. Someone else here might know.

The original crank case vent system was apparently not the brightest idea BMW engineers ever had. That can be improved, also.
_________________
Jim
1997 K1100LTSE 94,000 - has gremlins!
1995 R100RT Classic 16,650 crashed - repairing
1992 K75RTP 46,000
1992 R100R 24,000 - FOR SALE

"We shall not all die, but we shall all be changed."


Last edited by Jim on Tue Jul 24, 2018 11:27 pm; edited 1 time in total
Back to top
View user's profile Send private message Send e-mail Visit poster's website
a330us



Joined: 25 Feb 2016
Posts: 7
Location: winston salem, nc usa

PostPosted: Mon Dec 18, 2017 3:10 pm    Post subject: Reply with quote

Thanks for the replies, since I've always kept the bike on center stand and I'm still getting the whoosh when I open the gas cap I'm going to try and track that down. I was in that area trying to replace the air filter and I think I had the gas tank off(lot of bikes since then!) I might have crimped something. Arch.
_________________
2 bmw /2's
15 ducatis's, mostly paso types
1994 k1100rs
Back to top
View user's profile Send private message
abreeze
Flying Brick Rider


Joined: 17 Jun 2006
Posts: 671
Location: atlanta

PostPosted: Mon Dec 18, 2017 7:17 pm    Post subject: Reply with quote

Yeah.. The little grey check valve under the tank has to go.. Pos..

That will cure the tank pressure thing..
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Grunter
Flying Brick Rider


Joined: 30 Sep 2015
Posts: 367
Location: North East England

PostPosted: Tue Dec 19, 2017 11:10 am    Post subject: K1100 oil smoke Reply with quote

I have owned K75, K100 and K1100 bikes and never ever have I seen smoke coming out of the exhaust even after a long hard ride or starting up after the bike is cold, on the K1100 bike.

With the K75 and K100 bikes it can be (is) quite normal but they don't burn oil between changes. The K1100 bikes on the other hand use, oil irrespective of how fast/slow you ride but do not smoke! Nor do they ever seem to leave a burnt deposit on the plugs. Go figure that one out!

I have had 3 K1100LT's since 2003 and they all burnt oil at the rate of about 250cc per 800 miles. (Well within the BMW suggested limits) irrespective of how they were ridden, or what grade of oil was used.

I always use a 20/50 mineral oil of the exact specification in the hand book in my K1100LT and do also on my current K75s. I wonder if an oil with a lighter weight has been used, this could promote the symptoms that he is finding.
_________________
1997 K1100LT
1994 R1100RS
Back to top
View user's profile Send private message
Jydtw



Joined: 19 Jun 2018
Posts: 15

PostPosted: Tue Jul 24, 2018 6:25 pm    Post subject: Re: slight smoke on startup Reply with quote

a330us wrote:
Picked up a 94 K11RS from original owner several months ago with only 6500 miles on it and beautiful condition. It had been sitting for several years so did a complete service on it except splines. It even had original tires which were replaced of course and never smoked at all with the few hundred miles I put on it. I let it sit for 3 months or so and started right up but smoked some for 3 0r 4 minutes before it stopped. It's kind of a light gray and smells a little rich or oily perhaps.
When I open the gas cap I get a whoosing sound like a suction is holding the cap closed, is that normal or do I have a vent problem ? It runs great and oh yes, the bike is always parked on the center stand. Any suggestions on what is going on would be great. Thanks Arch.


I own a 1996 K1100RS. My third K1100. I like this style BMW.

Bought the bike with just over 71,000 miles. I have never owned a bike with that many miles but this bike runs great.

My K1100 did puff white smoke if it was left sitting on the side stand for several (3 or more) days. 1 puff that's it.

I only saw this occur once maybe twice in the 3 months I have owned the bike. If I leave on the center stand I never see any puffs of smoke. I also rarely let it sit for more than a day or two.
_________________
1994 K1100RS
1996 K1100RS Special
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    K11 Owners Group Forum Index -> Tech All times are GMT - 4 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group