We have a grovey skyhawk motor. On Sunday by husband completed and we rode all day around the neighborhood. Need some adjustments with the carburetor. My husband sealed the carb. to the intake tube and taped up a few wires. Now today 3 days after our last ride, we can not get it to start. It is not firing. We have checked the spark plug. I read on one post to have clutch engaged, ground spark plug and spin back tire to check for spark. If we did it correctly we did not see a spark. Any suggestions would be great. We were so pumped up about us having fun on this bike and now we are frustrated. :-|