BMW K bikes (Bricks)

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1Back to top Go down   lot of smoke on start up. Empty lot of smoke on start up. Sat Aug 22, 2015 2:01 pm

mr lee esq

mr lee esq
active member
active member
Hello, Every now and then when I start the bike up sometimes when its warm but mostly when the engine is cold, there is a lot of bluey smoke out of the exhaust and takes a mile or two to clear. Im not to sure if it could be the valve stem seals or something else. Also the bike bike stutters through the gears at lowish revs and seems lazy to respond could this be linked. It's had recent plugs fuel and air filters and I've tried different plug leads and coils and checked for air leaks of which there is none. Also I,ve re shimmed the exhaust valves but have one slightly loose on number 4 inlet. 
Any suggestions would be welcome please. Thanks, Steve.

    

2Back to top Go down   lot of smoke on start up. Empty Re: lot of smoke on start up. Sat Aug 22, 2015 2:43 pm

Corkboy

Corkboy
Life time member
Life time member
First off, do a search of this forum and google.

If you are leaving it on the side-stand then this is normal behaviour.

If you are leaving it on the centre stand then it is something different.

Before you get too worried, as I said, have a search. It has been covered numerous times.

These engines are pretty bulletproof.

And the answer to stumbling - don't run at low revs.  They like to be kept above 4k - it ain't a car engine  Laughing


__________________________________________________
Regards,

Corkboy '87 K100RS SE (The black one - one of the two bikes I'm sorry I sold)
             '87 K100RS 0140995 (Gone)
             '97 K1100LT 0188024 (Gone)
             '08 K1200GT Wedge - but still a K
             '08 Transalp 700
    

3Back to top Go down   lot of smoke on start up. Empty Re: lot of smoke on start up. Sat Aug 22, 2015 3:21 pm

Comberjohn

Comberjohn
Life time member
Life time member
Regarding the smoke, wot he says.
Stumbling? Check that the three blanking plugs on the throttle bodies are where they should be.
It has been known to put one on a linkage adjuster instead of the vacuum take off. Embarassed 
On that subject, did you sync the TB's after shimming the valves?
Try it with the TPS unplugged. They've been known to fill with water and give strange behaviour. It'll not do any harm to the engine unplugged.
It should pull cleanly from tick over.


__________________________________________________
Life is not a rehearsal.
2010 VFR 1200F DCT 
2010 R1200GS(gone)
1986 K100 Silver(gone)
2012 K1600GT(gone)
1984 K100RT Madison Silver(gone)
1989 K100LT Stratus Grey(gone)
1984 K100 Red(gone)
http://www.johnsdrivingschool.co
    

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