ok, so i am pretty much done with everything. i went to try to pedal the bike and it was very hesitant and very hard to even pedal, also i can hear the piston in the engine and i haven't added the gas and oil mixture yet. is it supposed to be this hard to bike? i haven't installed the clutch cable to the lever yet. i figure i could just flip on the clutch lever when i want to get it going. attached is a photo, do i need to hook this up in order for the bike to run? or can i just turn the lever? thanks for the help!!