detail for oil system
Dear All,
My name is Benno, living in Germany and trying to get my early 1929, 45ci 101 into running condition.
I would like to share with the possibilities for a better venting of the crankcase and I would like to know the best solution.
Starting 2015 by riding the bike with the original venting valve on the left side, I was facing a huge overpressure and a mass of oil to be splashed out by the vent-tube.
As the motor was complete overhauled and the pistons even so tight, that they were blocked one time.. I thought, that the bypass blow down would create this problem.
First the engine was remade, but is mechanical OK now. I check each time the level of oil in the crankcase and still got oil in the vent…
Therefor I decided to change the valve by the nice PCV from “Mike-XS”, where this low reduction valves were used for the ventilation of a Yamaha XS650.
The valve is now together with a retainer in the toolbox. The function is OK , but not perfect. (still to much blow-out.
The point now: As I have a second 101, which had a worn out DVAR-Bosch magneto… I had the magneto repaired and the bike is sitting now on the work-bench for assembling.
With the timing-cover open, I thought, that the conversion of 1929 to the vent-outlet on the top right side, might be the solution. (Tech Tip 13 WOW)
I have discussed this item with Carl-Erik, who would leave the 1928 solution (vent on the left), while he saw the risk of dirt to be transferred to the right side, if the vent is in the timing-cover…
Other mechanics in Germany told me, that the vent on both sides would be the optimum…
As I have purchased already a timing-cover with hole for the vent, I can do the transfer to the right like in the service-shot mentioned. I would like to do any version you experts recommend with experience!
If the right vent is preferred, I still believe, that the four small holes plus the two bold threads in the right crankcase are in total bigger than the existing hole for the tube on the left side. Therefor I do not intend to drill the holes bigger (in the right crankcase), even when it was recommended for the modification of a Chief.
To show the details… I have uploaded some files to my dropbox account (sse link). I am not sure if the link works… Please excuse as well, if my English leads to confusion.
Best regards
Benno
