Hi. I got a tr35 ive been trying to bring back to life. After stripping the bike painting the frame tuning the clutch etc. i put it all back together and it started after a few kicks. After running it a bit i tried starting it two days later and there is a ton of black "juice " shooting out of the exhaust from everywhere. My nice clean bike is now gross again. It also wont start unless i bump start it. How can i tell if this is crank seals or just a ton of unburnt fuel. Ive already had to smooth the needle because of wear and put the clip in the leanest position to no avail. Also where can i get new crank seals if thats the problem? Thanks for the help