After the last time I rode I noticed there was a considerable amount of oil on my frame below my shifter. After taking off the flywheel cover and counter tooth sprocket I found that my counter shaft seal had backed out. Looks like the sprocket kept it from coming out any further than it it did. I pushed back in with just finger pressure. Has anyone else had that issue? I have owned several Blasters and have not seen this happen before. Is there anything I should be looking for when I install a new one? Thanks for the help!