I've only had my Vmax for about a month and I've done both the peashooter and the shotgun. Both are pretty easy, especially the peashooter! It takes probably 5-10min. The shotgun....... I guess it depends on how many times you want to blow out the jets but to do all four probably anywhere from 1-2hrs. There are some very good step by step threads on here for both and they have pictures. Even if you aren't really mechanically inclined it's pretty easy. You should put a post up about what your bike is doing and/or read through some of the other threads on here about carb issues and you'll get your answer either way.