Leaking Gearbox

Adam, no one has replied. Maybe you have the only laydown box that still has any oil left in it. When I bought my ES2,the seller claimed the gearbox never leaked a drop.There was about one ounce of oil in it,and some solidified additive. The kickstart was originally sealed with a cork washer between the shaft and bush,pretty hopeless really.The kickstart shaft is below the correct oil level,so leakage is assured.I enlarged the second [outer ]of the two grooves with a grinding wheel as I would imagine the steel is hardened.I used a t&c grinder but a toolpost grinder on a lathe would be as good.Do the outer groove as the inner groove coincides with the drilled cavity inside.Make the groove the correct size for a 3.25 series o ring, fit the oring, not too tight or the spring wont return the crank properly and leakage ceases .Fit a sealed bearing to main gear, tight bushes to the selecter shafts,a tight bush to the main gear and the oil will stay in the box. Mine doesnt leak a drop ,there is one drip a week from the primary case, and thats it.

Adam, sorry I confused you. To stop oil leaking from the kickstart, you only need to widen the one groove, and insert o ring. Takes a couple of hours and the pool of oil under the bike stops.Trouble is you see other things that need doing, then the bike is in pieces before you know it.