For inverted type shock absorbers, there is a large amount of grease in the interior of the shell case for smooth operation. (Photo 1) When the grease starts to seep out from the air hole at the bottom of the cell case, this tends to be mistaken as an oil leak. The same mistake is also made during the hot summers when the heat from the brakes can also melt the grease and seep out of the same air hole.

If something like this happens, it is likely to be temporary if you wipe away the oil and it stops leaking. If you wipe the oil, but the oil still continues to seep out, then the shock absorber needs to be overhauled. For the inverted type shock absorber, because the oil seal is on the interior of the shell case, if an oil leak occurs, it is most likely due to an external factor, compared to an upright type. Also If for some reason the stroke part that you can see from the outside (Photo 3, Photo 4) becomes damaged, this will not be a direct reason for an oil leak to occur for the inverted type, so there is no reason for any concern.