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Burning through oil

Joined Dec 2004
13 Posts | 0+
Steamboat Springs, CO
My 06 650 is burning through oil. I can see a little smoke every once in a while, but every time I ride I come back low on oil. Could it be a different number of things?
 
My guess is rings. How much oil is collected in the air box and carb intake boot?
 
My 03 650 burns oil too maybe 150ml on a 70 mile ride, rebuilt it last year with new rings and still the same. Puffs a little smoke every now and then. Have just done a mod on the crankcase breather, used a small cone filter on a piece of hose to vent the crankcase to fresh air and blocked off the frame where the breather would normally recycle the air back through the engine. They can be prone, especially supermoto due to the more constant wide open throttle for longer periods, to suck oil up through the crankcase breather hence occasional smoke and maybe slight pooling of oil in the frame under the filter. I have only done one ride since and the oil is still at the same level so maybe cured it? Will have to see over the next few rides for sure.
 
Rumpleberg said:
My 06 650 is burning through oil. I can see a little smoke every once in a while, but every time I ride I come back low on oil. Could it be a different number of things?

How many hours are on your bike? And how much oil does it use?

Dale
 
The bike probably has 700 hrs. on it. I dont know for sure because the odometer broke at 16,500 mi. and I probably have at least a couple thousand mi. since it broke. Some oil does run down the frame and pool by the carb. But when I fill the oil, I only fill it so it is barely readable in the window. After a ride, even only 60 or 70 miles, the oil isn't even readable in the window when my bike is leaning on the kickstand. Fritz in Gunnison just put a new timing chain in the bike about a month ago and they said my bike had better compression than most they've seen. It of course leaks a little out of the weep hole but not enough to lower the oil level. So, for the moment I carry oil with me if I am riding over 50 or 60 miles and I am adding 1,2, maybe 300 ml on the ride. Someone posted that they only put 800 ml in their bike and it seems to have stopped oil getting down in the frame and seepage from the weephole. Maybe i will try that, but I'm nervous.
 
Rumpleberg said:
The bike probably has 700 hrs. on it. I dont know for sure because the odometer broke at 16,500 mi. and I probably have at least a couple thousand mi. since it broke. Some oil does run down the frame and pool by the carb. But when I fill the oil, I only fill it so it is barely readable in the window. After a ride, even only 60 or 70 miles, the oil isn't even readable in the window when my bike is leaning on the kickstand. Fritz in Gunnison just put a new timing chain in the bike about a month ago and they said my bike had better compression than most they've seen. It of course leaks a little out of the weep hole but not enough to lower the oil level. So, for the moment I carry oil with me if I am riding over 50 or 60 miles and I am adding 1,2, maybe 300 ml on the ride. Someone posted that they only put 800 ml in their bike and it seems to have stopped oil getting down in the frame and seepage from the weephole. Maybe i will try that, but I'm nervous.

Well first of all you have a lot of hours on your bike. I"m going to take a guess here and say that the majority of your riding is trail riding, judging from how many hours compared to how many miles you have on it. And you are setting the oil level correctly.

You have done well to get that many hours out of your bike with only a cam chain? The oil consumption is more than likely getting past the oil scraper ring and is being consumed in the combustion chamber. You said it puffs a bit of smoke, does it do it when you are on the throttle or off the throttle? If it's off throttle it's getting past the valve stem seals. On the throttle, it's getting past the ring.

This generation of motor does not use oil unless something is wrong. When I had my motor down after a broken valve spring (220hours), I found that the crank seal on the clutch side was blown, thus allowing more oil to pool in the bottom end as the compression from the piston coming down was less, and was not able to blow the excess oil out the reed on the lower right side of the motor.

My advice at this point is to take it back to Fritz and have him go through the motor completely, and replace what ever it needs or is questionable. Hind sight being what it is, I'd replace the valve springs, and have them put in an ORANGEBERG seal kit and eliminate the oil coming out the weep hole.

You've gotten a lot of miles out of your bike, and IMHO it is time to put some TLC back into her and go another 700 hours!!
 
Thanks for the advice. I have had a valve spring break twice. One at approx. 400 and 600 hrs. I heard that there were new valve springs available, sort of a two part spring that was not supposed to break as easy. I'm just trying to keep this baby chugging along until I get my 08 fe650 motor overhauled and then give the 06 all the lovin it needs.
 
I believe that Kibble White makes the valve springs you are talking about. PM Taffy about those springs.
 

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