I have a 05 road king custom that keeps going down oil I have put on 2500 miles since my last oil change an i used almost 3/4 of a litre I checked for leaks nothing i also checked to see if i could see any smoke from exhaust nothing ...Had buddies follow me also an they could not see nothing....I watched it at first start up in the morning nothing...it is going somewhere i just dont know where.....I was told that the crankcase breather tube inside the moter may be plugged....I just dont know ANYBODY GOT ANT IDEAS
THANKS CUB

 

Have You checked the oil level in Your primary? Crankshaft seal could be leaking, allowing the oil to go into the primary.

 

2005's have "valve-itis" whereas the valve seals sucked causing oil consumption. If yours haven't been changed out, that might be the issue.

 

Yeah that or look at your plugs to see if they may be fouling a bit, otherwise I would drop the headpipes and look at the valve stems you may have a guide seal going bad, I had it before and the only way you could tell is on decel or a downshift there was a blip of smoke. Smoke would be more visible at night than daytime too.

 

 

to summarize:

if the primary is overfull- it's that seal between the motor and the primary

burning oil is WHITE smoke through the tailpipe:

on decel: is valve seals ( increased vacuum pulls oil past the seals)
on start up: is also valve seals ( oil seeps past the sealswhile the motor is stopped

on accel: is piston rings ( oil on sides of cylinders is not scraped away by rings, oil stays above piston and is burned.

a Liter ( about a US Quart ) over 2500 miles is a little high as long as you are sure the dipstick measurements are the same--- start / finish measurements

many of us run the oil a pint (1/2 a liter) low to reduce blow by or chances of the dipstick being pushed out anyway.

Mike

 

Well just went out in the garage pulled the plugs an the front cylinder plug is a little oil soaked...rear plug if fine....bike only has 10,000 miles on it THANKS GUYS FOR THE INFO

 

assuming the bike is new to you?

could be the previous owner didn't ride much and seal have dried?

I would try- just riding it, see if the seals come back and there is improvement

or switching from syn to conventional oil
OR to a higher grade, less viscous

jeez, riding season almost done?
Happy Thanksgiving!

mike

 

The bike is new to me i bought it with 7000 miles on it changed the oil ,,,i used castrol 20W50 with lucas oil treatment...I put 3000 miles on it... an it was down 3/4 of a litre so i topped it up put another 1000 miles or so an checked it the other day an it is down about 1/2 a litre.

 

Mine is doing the same thing. Using 1/2 quart to 2500 miles with 20-50 Amsoil. Both plugs are clean when i pull them and no smoke out exhaust, but lots of oil in a/c. Big Sucker air filter seems to be catching all of it. Wondering if breathers in heads need changed.