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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: shoebox1.1 on August 09, 2015, 08:47:57 PM

Title: Slight blue haze on startup. No side stand use!
Post by: shoebox1.1 on August 09, 2015, 08:47:57 PM

I know If the brick is on its side stand oil can seep into the combustion chamber.   I do not use the side stand but only to get off the bike.  Then on the center it goes.  68000 miles.  Well kept.  Oil always changed
Since i have owned the bike I've never seen blue smoke.  I was sitting on the bike choke 1 and saw in mirror blue haze and smelled oil burning.  Can't explain.  Going to monitor.  Normal sometimes?

Title: Re: Slight blue haze on startup. No side stand use!
Post by: Chaos on August 09, 2015, 10:46:42 PM

It can happen even on the centerstand. My theory is that if the engine stops with one piston's valve's closed on the compression stroke, as the charge cools it will create a vacuum that can draw oil past the rings.  I quit using the centerstand years ago, let the engine idle for a moment leaning to the right before I shut it off.  Smokes about 1 out of 10 times.  Nothing to worry about.

Title: Re: Slight blue haze on startup. No side stand use!
Post by: shoebox1.1 on August 09, 2015, 11:05:39 PM

Very interesting.  I'm going to start an oil consumption test here soon when I change the oil.  Ill try the idle to the right. I like the idea

Title: Re: Slight blue haze on startup. No side stand use!
Post by: johnny on August 10, 2015, 07:17:51 AM

if my garage fills with blue haze when i start my motobrick... i know my exhaust valves are adjusted properly...

j o

Title: Re: Slight blue haze on startup. No side stand use!
Post by: shoebox1.1 on August 10, 2015, 08:24:40 AM

Are there no exhaust stem seals on these engines?

Title: Re: Slight blue haze on startup. No side stand use!
Post by: K75RT Keith on August 10, 2015, 09:52:00 AM

It's normal for your K-bike to blow a little blue smoke.  If it blows a lot of blue smoke, then there's a problem.

Title: Re: Slight blue haze on startup. No side stand use!
Post by: Nantucket_Red on August 10, 2015, 11:08:18 AM

Mine does it once in awhile. No big deal.

Title: Re: Slight blue haze on startup. No side stand use!
Post by: shoebox1.1 on August 10, 2015, 11:09:42 AM

I'm liking these responses and some general internet searching shows the same -- normal

Title: Re: Slight blue haze on startup. No side stand use!
Post by: shoebox1.1 on August 10, 2015, 08:54:23 PM

No smoke tonite on my normal startup!!  Thanks so much

Title: Re: Slight blue haze on startup. No side stand use!
Post by: redtank on August 14, 2015, 07:08:45 PM

Years ago my brick used to smoke after the side stand parking stunt. I just got the bike back and have been riding and parking on side stand. I try to remember to lean bike to right side for a bit before getting off, and have had no smoking issues. I'm beginning to think the brand/model of oil in engine plays a part in the smoke thing. I've heard that older Goldwings did the same thing....

Cris