You got yourself a SUNL!
I just sold one of these ATV's not too long ago. Was a Sunl Hanma R5 110cc. These things are quirky -- made in china, so that's par for the course. Tires on this one leaked as well, among several other issues. Get used to working on it, & keep a trickle charger on that battery -- the electrical systems are atrocious on these ... then they rig them factory with brake lights & head lights when the system can barely power the ignition! Plus some black wires have 12V and some red are grounded! :lol
It was my buddy's. He got it for free & brought it to me to get it running. It took me about 3 weeks to get to it because I was building the RD at the time. So I cleaned the carb out, re soldered a busted wire onto the key switch, & repaired the 2 pinched brake light wires (won't start unless it knows your holding brake), & also filled it up with Amsoil. Then I tell him to come get it & he leaves it here for 6 months! After chasing him down, emailing , calling, texting ... I said if you don't come & get it, I'll sell it. Blew me off again, so I'm $275 richer now. He proposed to his girlfriend who isn't too crazy about kids on ATVs, so I think he didn't want to admit she won't let him pick it up!
I couldn't live like that. My wife doesn't get on my case about anything. I buy what I please & do what I please. But that's another story for another day!
You'll need this link, I assure you: http://www.sunlpartsonline.com/
And for the manual, same place: http://www.sunlpartsonline.com/more-chi ... 77_28.html
If you have any questions about it, give me a shout.
Oh & I still have the factory charger for it too. For you, $10 shipped.