As you can see I've got oil all over the rear end. The engine doesn't smoke at all. Oil level is good. This started happening about 2 rides ago. What you are looking at in these pics is not a build up over several rides, I cleaned it all off with brake cleaner and let him ride it again, so what you are seeing is from about 2 hours or ride time from earlier today.

I have a feeling that the oil pump is going out. I hear that they are notorious for going bad. It is an 05, so if the oil pump is bad, I hear that I can just bypass it and run my own pre-mix. If that's the case, I have two questions. First, what's the process for bypassing the oil pump? Second, what's the pre-mix mixture everyone is happy with on these little badass machines? I'm assuming 32:1, but I'd rather hear from more experienced KFX 80 owners. Also, for what it's worth, a plug got fouled recently, which I just switched out 2 days ago, it definitely showed signs of running rich, but the machine doesn't even smoke after it's warmed up and I close the choke, honestly it runs like it's brand new once it's warmed up, I'm pretty impressed.

Thanks in advance for all fo the advice.

 

It looks like motor oil (which would be weird). Where is it coming from?
Oilers usually stop pumping, not put more out. I feel the oil pump may be a non issue here. Altho to answer: you need to take the clutch cover off (you need to maintenance the clutch's anyways). Once off you remove the lil black plastic bow tie off the end of the crankshaft. That's what drives the pump. Then plug the line going to the carb. I indeed run 32:1 with a good quality synthetic oil.

 

Jack knows more than me, but that looks like unburnt fuel, mixed with carbon from the exhaust. I would guess at the float needle stuck, though why, whether it is oil or fuel, you are not getting clouds of blue smoke, is a bit of a mystery. With that fancy exhaust, it is possible it got filled with fuel a while ago, and is now blowing it out.

 

It does look like unburnt fuel, but, it's a lot! and way back on the rear end?! It could be the pipe got full.