hey im a new rider from manchester uk im 16 and since i was 8 i have skated and now im starting to get bored with it. i bought with christmas money and i got a second hand coustom bike of a friend it is mainly fit pieces. so i have got used to riding the bmx and stuff but i cant get a grip on bunny hops idk why but my front wheel doesnt want to lift up like all the youtube tutorials say and it only comes up like 2 inches not giving me time to lift my back up because it doesnt stay up it just falls down straight away ... any help would be helpful thanks