If you port your reed cages it will give you more flow.Do a search and you'll find directions with pics on how to do it.Reed spacers are a waste of money unless you run bigger carbs and need to clear the clutch arm.Boonmans's mods will wake your shee up,and the shift star mod will make shifting easier and make finding neutral easy to find.Best of all Boonman does great work,and his turn around time is great,he had my stuff back to me the next day.