I went for a ride with my 80cc bike to the store to buy a few things. the bike sounded just fine and was no problem on the way to the store. but when i got out from the store i jump on, and pull the clutch and start pedaling. when i got enough speed i release the cluch... nothing happens, so i thought i needed more speeded but when i try again it still wont start. when i parked it i took of the spark plug from a hot engine and i just read on this forum that i should do that. so i dont know if that is the reason. and when i released the cluch when i was going pretty fast while trying to start it, the clutch sounds like when i pull the clutc handle in it is 100% engaged but when i release it and the pin on the engine goes out it sound like it is like 50% engaged. because it is very easy to push the bike even with the clucht not engaged, but it wasnt like that before.