Howdy! I'm new, I live in Texas and enjoy all types of projects. I enjoy hunting, fishing, vehicles of any type, basically anything that's fun Thanks for Looking! I'm in the process of building my first motorbike and am at the point where I need to place the chain on the motor's sprocket, but the sprocket won't turn. I have removed the spark plug, and attempted to use the "tool" included in the kit... but it wont thread on (not sure why, no alterations have been made to any of the parts.) I have attached pictures the first is specifically of the sprocket on the motor, the second is of the entire bike. Any help would be appreciated! (edit) I've been looking around and it seems that some kits come with a wrench that turns the sprocket... mine didn't come with a wrench, just a large hollow bolt with another bolt inside of it.