I noticed when I first start my 97 750 the exhaust appears to be white. What causes this and is it a big problem. The bike only has 6500 miles. I changed the plugs last summer.

the spark plug color is more important..BUT sounds lean to me..

moisture is burning off. don't worry about it.

i get moisture on start up and my tip is very dark...

If it is white only when you start the bike... dont stress on it. Mine did it all the time and I had to do some work, but dont worry if it is only on startup....

John

If it makes you feel better, mine does the same thing on startup.

As I understand it:

White smoke = water/steam.

Black smoke = fuel/running rich.

Blue smoke = oil.

Red smoke = Satan has possessed your bike.

Originally posted by spongebob:
i get moisture on start up and my tip is very dark...<font size="2" face="Verdana, Arial">unless i'm mistaken, icgixman said he had white smoke coming out on startup, not that the exhaust tip was white.

it's normal for a properly jetted/mapped exhaust to be a bit dirty.....exhaust smoke is not exactly clean.

Originally posted by freefly:
As I understand it:

White smoke = water/steam.

Black smoke = fuel/running rich.

Blue smoke = oil.

Red smoke = Satan has possessed your bike.<font size="2" face="Verdana, Arial">Well water/steam shouldnt make SMOKE... It wouls make steam and that should go way just after it leaves your pipe.

Most of the time, white smoke is oil that is burning... It might have a slight hint of blue, but that would change with the oil you use.

John