Get some Juice Randy go with the 100 shot you'll be just fine! +1 on the Window switch and always keep the pressure good, if you maintain the simple items such as Colder Spark plugs, Super Unleaded Gas, and a Good tune your set to go. You won't feel much of a kick with a 50 or 75 but it's up to you. So far going on 80,000 miles I would spray this bad boy pretty much every day so far so good everything is holding up LOL as far as the Kit I have no problems with the Zex kit, keep in mind if your looking at the one from AM the GT kit (which is cheaper) is exactly the same other than the jets just get different instructions