[colind]

A few days ago, i was given a mini/pit bike from a buddy that was moving out of town. Unfortunately, he knew very little about it as he had bought it used on craigslist a couple of years back, but didn't do much/any leg work on figuring out what this thing is. Being that as it is, now that this thing belongs to me, I'd like to put it back into running order so we can bring it with us on camping trips and whatnot. It seemed to run well, with exception of a bad idle, which will (hopefully) be fixed by a carb cleaning and/or adjustment or replacement.

Here's a couple of things that stump me. When I've been trying to identify this thing, I've noticed that the gas tank looks a little different than a lot of the chinese pit/dirt bikes as it appears to be a perimeter frame, which I'm guessing is steel (based on a bit of surface rust on the metal), and the tank sits in the center of the frame, suspended by the sides, rather than on a central frame tube.

Another thing that is getting me is the swingarm.... I haven't seen a swing arm like that on any other dirt bikes (the teardrop shape). I figured with those somewhat unique features, it wouldn't be too hard to identify, however, after browsing through pictures of dirt bikes, I haven't found any that look similar. The bike does have a vin number (of which a search comes up empty handed), but doesn't have any "brand" identification marks on it anywhere. On the VIN plate it does appear to be a 2008, so that's all I really have to go on.

Another thing I'm concerned about is the engine. When I was given the bike, I was told it was a 125cc, however, I'm not sure how to identify which specific engine it is. It does have a sticker with the shift pattern (1D3U) but that's about it. I also noticed one thing that struck me as concerning... There appeared to be a metal tube of some sort (connected by banjo bolts) that ran from just above the spark plug location to a location on the bottom of the engine - this tube appears to have been pinched and cut off at each end, only leaving the banjo bolt and a pinched/cut piece of metal pipe/tube sticking out.... What is this tube/pipe/passage for??? Is that an oil passage? Do I need to be concerned about oil starvation to the engine with that tube not being in-tact?

I've got a good number of parts on order for this thing (generic stuff), but hopefully with a little help I can get this identified so I can properly deal with it on a regular basis. I'm not looking to do a full restoration, but anything that can help me identify which plastics it will accept, and little things like that would definitely be nice.

Thanks for the assistance in advance. If this is the wrong place for me to post this, please forgive me as I'd be happy to repost in the proper location if this isn't it.