My bike when trying to start never kicks over at first, i hav 2 bump start it until the bike gets warm then it is fine, i know the cogs are missing 2 teeth but how much will it cost as i have been told that i need a new head gasket as well. this wud be helpful if you told my the price in pounds and pence as i am in england any idea's about the price range as it is only my second motorcycle and my first geared bike so i don't really know a lot about the can some body help