Lubrication on the pre oil pump engines

Re use in your tractor. Main problem is the oil is contaminated with unburnt fuel.

Wow! This is a really great question. I always assumed that a little bit of oil seeps past the crank case reed valve and the primary side main bearing seal when the crank case experiences vacuum each time the piston moves up.

Definitely makes you think that the whole crank assembly, rod, piston, rings, wrist pin, etc are pretty well starved of oil.

I have an engine that'll be going together with the following parts treated by Microblue to attract oil: rod pin, rod bearing, the whole rod, piston, rings, cam follower bearings, and cam follower bearing axles. Additionally, I'll be using Microblue hybrid ceramic bearings (steel races with ceramic balls) for the mains and cam bearings and these are all subjected to their treatment for attracting and retaining oil.

It may take me quite some time to get hours on this engine (it's not even assembled yet) but my hope is that it'll last a lot longer and prove out a process that might be recommended for these older engines with no pressure lubrication.

The chief engineer at Microblue didn't seem concerned that these engines are purely splash lubricated.

I have a 98 apart right now. There is a 3mm or so hole drilled from the cam chain cavity into the crankcase cavity. It also has a oil jet pointing at the crank coming from the oil filter (I understand that your motor does not have the oil filter or oil pump).

When the piston comes up it creates a vacuum and oil is drawn through the hole, when it goes down it pushes oil out of the reed valve below. The placement of the reed helps to maintain the correct oil level in the crank cavity (my opinion) as when the reed valve is compromised excess oil consumption occurs. The oil level in the crank cavity becomes too high.

It is an offshoot of the original Husky RAL motor (Reed Activated Lubrication). That system used 2 reeds and only a pint of oil.

It looks like Husky placed the oil screen a bit higher than where Husaberg has drilled the oiling hole. Changing the oil frequently is a good practice as unfiltered or mostly unfiltered (depending on the year) oil directly enters the crank cavity.

It appears that Husky at least screens all of its oil before entering the crankcase cavity and Husaberg does not.

I am sure that there is more to the story and a good topic for further discussion.

a lot of Honda commuters run with just a teet screen filter and after hundreds of hours the oil is still gold in colour...sickening isn't it!!!

taffy