I'm wondering what the common setup is for the cheap engines people sell online. What diameter bolt I should use and if/where I need washers or lock washers. I bought a 66/80cc kit online and didn't get any bolts for it. Went to a hardware store and bought three 1/4" x 1.5" nuts/bolts to hold it together while I put everything else on. I noticed the 5/16" bolts didn't quite fit through the sprocket and mount. I don't know if it's worse to wear the sprocket and mount by threading it with the bigger bolts or potentially loose mounting with smaller bolts, so I decided to ask here. I couldn't find that detail in any of the places that sell the sprocket mounting set.