Ok so I got my bike, 99 Savage w/5500 miles, last yr for $1800. I think I overpaid but now I'm really confirming it. My first highway trip ended in a mechanics shop. I went 15 miles on country highway in Indiana & the sob made a loud pop & I lost all power. I tried several times to restart it but no luck. After the mechanic looked at it he said all he could see was I was leaking oil & my rectifier was going bad. I was getting 10-16 volts & sometimes 8. I couldnt afford to replace it so i took it home. Well it wasn't 1 week later & the sob died again on me & wouldn't start. The whole week up to that it began back firing louder & louder. Well I pulled the carb out as some people here stated I should & it was clean. I replaced the plug & it fired up. Still dies on me & still waiting to find a rectifier on eBay cheap. Well over the winter I noticed a lg amt of oil on the motor fins. I couldn't & still can't find what's causing it. It's only back by the pipe that's oily & then gravity has been pulling it out towards the front is what I assume.  Well I also noticed about 1/8 in oil puddle inside the air box. So im really lost. The pipe is resl rusty on the inside too  Any and all help would be helpful as I'm limited in knowledge of mechanics. Basically been a hands on trial & error.

I've tried the petcock & it works fine. Another problem I had/have is the choke. It revs itself pretty high if I leave it on half choke longer than 20 secs but not in full. Is any of this normal?