jets daves mod with dynojet kit yes or no? ?? if i were to start over on a new xr650L, i would go daves mods. i had real good luck with the dynojet kit once i drilled the slide. it had a bit of a hesitation with just the djet kit. the reason i would do this?? 1-2 dollars vs. 60-80 bucks for the djet kit. for me that doesnt matter anymore because i use a fcr 41 pumper now and don't look back!