I just got my first motorized bike together a couple of weeks ago and I've been working out the bugs as I've been riding it. I keep looking for ways to make it run smoother, better and more enjoyable. I had a constant "popping" from what I thought was the chain due to either too much slack, too tight or, too close to the frame. None of those changes seemed to help so, I was starting to fear that the bearings might be going in the rear wheel. I got looking closer at the chain and noticed that there were a few links that were stiff to move and some were actually staying angled from going around the sprockets. They weren't straightening out between sprockets. So, I decided that I would oil the chain with some air tool oil that I had laying around. I started at the master link and oiled each link's joint with just a drop or two and let it soak in. Time consuming, but thorough. I took it out for a ride and you could tell instantly that it helped. By the time I got back from my 1.5 mile ride, the difference was AMAZING! It runs so smooth now! I was having a lot of chain slap when I pulled in on the clutch going down hills, now, there's just a slight buzz as the chain moves around the idler pulley. I always wondered how everyone was running with such slack in their chains and it wasn't slapping all over the place. Now, I know. I'm pretty mechanically inclined and, sure, I KNEW that chains needed oiling but, being my first motorized bike, I didn't put so much importance into it as I do now. The difference is well, amazing! Hopefully this helps someone else out. I've got some pearly wide whites on my bike and I had to clean them off after my ride, but for the difference that it made in my bike, it's well worth it!