I have gone back to a 2 stroke engine as my 4 stroke was not up to the task of pulling me up hill around my area even on the flat I have to cycle to help it along. So I've gone back to 80cc 2 stroke engine just ran in with the standard 44 tooth sprocket. I have a 34 tooth sprocket I was thinking of fitting has anyone else done this ? Does this put too much pressure on the engine ? I don't mind peddling the bike giving it a helping hand up hills etc. would the bike be too fast ?