Exhaust Spooge

[trask-rider]

I recently did a top end rebuild on my 2002 KDX 220, and after a couple of rides, it seems like there is a lot more black spooge out of the exhaust than normal (I did not make any changes to my jetting or premix ratio).

Any ideas on what might cause this and how to reduce or eliminate this issue?

Thanks!

[SS109]

Rejet your bike. Seriously.

[scheckaet]

Rejet your bike. Seriously.

+1
you haven't change anything but a top end...so you have changed something