Hello,
I have the following problem ;
The bike lost a lot of power all of the sudden when I was driving. Now when its turned on almost no burned-oil smoke comes from the left exhaust and the air that comes out is far colder than the one coming from the right. Then after a while the left one makes a sound like someone sneezing and throws out a big amount of smoke from the oil. Last time this happened it had something to do with the spark plugs (I'm afraid I don't know the term in english) and my mechanic just took one out, cleaned it and then the bike was ok. I changed my spark plugs with new ones, cleaned the pipe (the thing that gives electricity to the spark plugs) but still nothing.

Also I took all the gas from the tank, put some new one and did about 50km. The bike revs much better and now it does not "sneeze" that much and oil smoke comes from the left one as well. But still it's much under powered.

Any ideas what should I look ?

Thanks

Check compression. What do the plugs look like?
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james
Its not how fast you go...Its how you go fast.
MC21 Rothmans
RS250
RC31
CRF250X
748R
Porsche (many)
http://members.rennlist.com/j911brick/rennlist3_002.htm

Is that cylinder getting hot at all? Does it run worse if you pull the spark plug cap off?

Check the contacts which supply the power to the coils for pitted surfaces, and a good tight fit on the spade connectors.
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

I cleaned the pipes (or is it called cap, I'm sorry but I'm not familiar with english terms) even better they are now shiny, I tightened the contacts of the power to the coils and i also cleaned them, they were toooo dirty and although it was raining hard last night and I was not able to ride for quite some time and the way that I wanted, the bike is in a good shape again and I could say it performs even better.
Thx for the help.

Our pleasure!

(And I think you're looking for the term 'end can')
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball