I am rebuilding the
Engine on my fl350 and I have been thinking about this for awhile, the mod for the balancer oil pressure relief has been around for some time and works good. But I have done the mod on mine before and ran into the same problems that a lot of others have and that is oil being pushed up the tube and for some reason mine always seeped oil out where it connected to the fitting in the dip stick hole and was always a pain in the rear to check the oil level, so I have been thinking about it and this is what I came up with:
First Honda designed the casing to relieve the pressure thru a hole above the balancer that would collect there and should have only let pressure go past there in the hole in the base gasket across to the other half of the case then drop back down and go thru a hole by the stator. But as we all know that didn't work at all, it would eventually reach the start and screw it up and get oil all over the stator and that wasn't good either. Sooo Then the mod was done that we all use now.
This is what I came up with, use the holes in the gasket and on the casing side where a screw would be installed to stop the oil there is a pocket there to drill and install a smaller tube to release the pressure. This way you won't have the balancer gear slinging the oil up the tube and it seems to me that it will release the pressure in the same manner that Honda tried to do. I wouldn't do this unless you have the top end off for rebuild due to the shavings that get in while the hole is being drilled. Here is a pic. of the front of the Engine with the seat removed to show that there is plenty of room (thanks to Canadian Oddy).