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04 CRF 450 oil problem Need help

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Just bought this 04 CRF 450 and this weekend I was riding and notice that I had oil dripping from my air filter box .so I check it out and found that it was engine oil so I check my sight glass level it was past full,so i opening the cap and found the oil level to be full to the top .then I check tranny side and it was dry ..so when i pulled the tranny drain plug only a little oil came out and some water .what seal keeps the tranny oil out of the motor side ? Has anyone found this to be a problem and why does it happen? How can I fix it? how do I keep it from happing again? Thanks Bobby

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It happens, there was a thread not to long ago on the topic. I dont remember what seal it is since I have not experienced the issue myself. Do a search you will find the answer easily. From what I remember it is the seal behind clutch basket ...the main seal maybe?

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its the seal on the right side of the crankshaft......it could also be the left side balancer seal since they both seperate the trany oil from the crankcase oil.....i just had to rebuild my whole lower end and tranny bearings cause I ran mine dry as well.....the seal is easy to change but since you got a 2004 I would say your bike needs main bearings + seals, since the bearing play will cause the seal to go bad fast.

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thanks guys i'm tearing it down tomorrow and replacing the seal and will see if that works..there was a little oil left but not much in the tranny and it was not making any noise ,so maybe I got away with it

Thanks Bobby

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