the mixture i think was 32:1 im not 100% sure from now on ill make sure it is though. how many feet above sea level are you i dont know what you mean by this. i think the jets are just standard. the air filters are k&n green ones. mods that im aware of are front fmf platinum series pipes classic fmf back boxes upgrading them to power core 2 silecers and k&n air filters the green ones thats all i can think of