My new to me bike (1998 Dyna Convertible) was in rough shape when I got it. Was loosing engine oil and gaining Primary fluid. Changed out the main crank seal on the clutch side and now that part of it is good. I know this because I measured real carefully how much I put in (770ml is what shop manual says to put in there) I'm Canadian so I work in metric, then rode about 350 miles and drained it and measured again and did not gain any so my seal change was done right.
The bike lost about 1/2 quart engine oil in the 350 miles.
What I did check was the following.
1. Took the rocker covers off to inspect the umbrella valves as I thought maybe not installed right and might cause blow by. Although no oil coming out of the breather tube into the air cleaner. They look real good and installed correctly.
2. Previous owner had installed a chrome oil filter housing and different oil lines.
Checked the shop manual and all lines are routed correct. Took them all off to verify no blockage.
3. Did a compression check. Front is 138 lbs, rear is 139. Engine was at normal operating temp, had ridden for about 10 miles.
Bike has about 26000 miles.
Bike runs good and plugs look nice to me.
Don't see any smoke out the pipes at startup or anytime.
The previous owner was using Ansoil synthetic but I switched to 20W-50 Castrol Motorcycle oil. I have been using this in my other bike for 60000 miles and no oil consumption on that one.
Where is the oil gong?? any help is appreciated. Thanks
Where is my oil going. Any ideas would be appreciated.