97 FLHTCI Need some pointers
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Stage IV
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From: Ohio
97 FLHTCI Need some pointers
So I just bought my first bike. Pretty excited. Get it down the road no problems, it runs great. After the first poker run I rode in someone mentioned to me that my bike is blowing blue smoke. I checked the oil and ride on, then checked the oil at the end of the 100 mile run and it is burning oil.
I've noticed at idle it will blow black smoke which to my knowledge is an air to fuel ratio problem. Ive been told the blue smoke could be rings, or crankcase breather. I've rebuilt tons of small engines so im not afraid to do anything myself I just need pointed in the right direction. Has anyone had any of the same problems? Any pointers as to what I should do?
thanks, Tom.
I've noticed at idle it will blow black smoke which to my knowledge is an air to fuel ratio problem. Ive been told the blue smoke could be rings, or crankcase breather. I've rebuilt tons of small engines so im not afraid to do anything myself I just need pointed in the right direction. Has anyone had any of the same problems? Any pointers as to what I should do?
thanks, Tom.
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Blue/grey smoke would indicate a ring or guide/seal issue.
A leakdown test would allow you to pinpoint, but if pulling the top end, best to go thru both cylinders and both heads anyway.
If more than 25K miles on the clock, check the lifter rollers for any play whatsoever.
The black smoke, could be nothing more than having that MM t/body tuned correctly, which btw work VERY WELL on those, as long as they are in good condition.
Scott
A leakdown test would allow you to pinpoint, but if pulling the top end, best to go thru both cylinders and both heads anyway.
If more than 25K miles on the clock, check the lifter rollers for any play whatsoever.
The black smoke, could be nothing more than having that MM t/body tuned correctly, which btw work VERY WELL on those, as long as they are in good condition.
Scott
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Joined: Mar 2010
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From: Poolville
Like Hillside said, a leak down and compression test will tell you a lot about the rings... Evo motors are pretty reliable when it comes to the rings. I would suspect the valve seals first at that mileage... If it only smokes on deceleration I would say start with just doing the seals. With the right tools you can do them on the bike. If not then you'll have to remove the heads and at that point...........
We'll you know the old saying "while I'm in there" let's see a valve job, re-ring, lifters, and a cam....
not trying to spend your money but it's common practice.....
Another thing you can do is pull the exhaust and look inside at the exhaust valve guides and valve stems and see if you see oil trails coming down from there. That's another good indication that the seals are shot. Nine times out of 10 you can replace the seals but you could also have too much clearance between the valve and the valve guide which at that point would require a valve job
We'll you know the old saying "while I'm in there" let's see a valve job, re-ring, lifters, and a cam....
not trying to spend your money but it's common practice.....
Another thing you can do is pull the exhaust and look inside at the exhaust valve guides and valve stems and see if you see oil trails coming down from there. That's another good indication that the seals are shot. Nine times out of 10 you can replace the seals but you could also have too much clearance between the valve and the valve guide which at that point would require a valve job
Last edited by 98hotrodfatboy; Aug 24, 2017 at 11:45 AM.
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