I have some oil seeping out of the bottom of my crank case and some leaking out by the front sprocket.
When the motor running in neutral i can see it bubbling out.

Can someone please give me a few hints on how to fix this.
I have noticed a loss in top end power.

Thanks

 

If its leaking out of the bottom where the case halves meet you may have to split the cases to fix it. make sure its not just the leak from the sprocket seal which can just be replaced with a new one pretty easy.

I had my factory skid get bumped up against the bottom of my case and it all but rubbed through. I had to take it apart and had a machine shop fix it.

If the oil is bubbling out make sure your breather tube is un-obstructed

 

It sounds like your piston rings are worn out and allowing compression into the crankcase. The only way you could have bubbles is if the crankcase was under pressure(a pretty bad thing). If you rebuild the top end *most* of that should stop. It's blowing the oil past the seals....

 

So all i would have to do is replace the piston rings?