Question about 1993 Suzuki VS 1400 Intruder
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Posted on Jan 02, 2017
Discoloration on chrome pipes is completely normal and is referred to as "bluing". It's caused by the extreme tempurature of the exhaust as it leaves the engine. Typically it will affect the first 12-inches or so of the exhaust pipe. The problem can be worse if your engine is running too lean a fuel mixture. Since your bike is relitively new the engine might not be completly broken in yet, this will cause it to run a little hotter than it normally would.
Why one pipe is changing color and not the other? I'm not sure, one cylinder may be breaking in quicker than the other, or the mixture in the cylinder may be leaner than the other (not too likely with today's fuel injected bikes). If your bike is running and idling correctly and not overheating you shouldn't worry.
Pipe bluing drives motorcycle owners nuts, especially Harley who like to put expensive aftermarket pipes on their bikes. As a result there are a number of products on the market that are supposed to be able to remove the bluing or insulate the interior of the pipe to prevent the bluing. Stop by your local aftermarket motorcycle parts store and talk to one of the parts guys. They may be able to suggest a product that will help you resore the proper color on your pipes.
Posted on Apr 27, 2009
SOURCE: Oil leak by exhaust pipe
I am not personally familiar with a 1975 DT250, but here is a general overview. If the bike is a 4 stroke, the oil you observed could have been from the exhaust, however it is more likely that it is from a leaky valve cover gasket or a head gasket. If the bike is a 2 stroke, the "oil" is from the exhaust (expansion chamber). It is excess 2 stroke oil that accumulates. You should reduce the mix to 32:1 or even 40:1 and replace the oring gasket in the opening of the pipe. If in a pinch you can use high temp silicone, but not a good way to go.
Posted on May 11, 2009
SOURCE: white smoke
Are you sure the smoke is white? White smoke is usually caused by antifreeze burning.(This could be a head gasket)
If the smoke is actually light gray it is oil burning.(This would be rings or valve seals)
If it smokes mostly on startup and then stops when it warms up (It could be a worn valve guide or deteriorated valve guide seal (or possibly several) allowing a tiny amount of oil into one or more cylinders).
If it smokes mostly when you are cornering (It could be too much oil in the crankcase).
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Posted on May 19, 2009
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