I started my new bike today, it started within 20 ft, it had never been run, and it just fired right up. I have a 48 tooth sprocket on it so it doesn't lurch like the other one built.... I didn't see the chain hit the tire even though it's real close..... I used the removable link on the chain... on my other bike that link gave way and wrapped the chain around the rear sprocket.... from the experts; what's the best way to connect the chain... "master link" or fixed...and if I use the master link which way should the open end of the link face?.. A totally different experience and a superbly comfortable seat and "ride"... The hole in the cylinder sleeve apparently doesn't affect the functionality of the engine.. this is what I was "looking" for .... now i'm happy.