I few weeks ago we got our boy a raptor 350 which he loves.Today I noticed that there is oil leaking by the front sprocket.I took the chain gaurd off and there was rope rapped around the sprocket.it lookes like the rope that is left ,after getting most of it off,is making the seal leak .I dont have a socket big enough to take the sprosket off,but i will get one tomarow and take it off.My question is if the seal needs to be replaced how is it done? Is it done from the outside of the motor?