The engines I have are as follows (all homelites) 30cc(wacker), 33cc(chainsaw), 45cc(chainsaw) and a few 31cc ryobi twin rings. I have the stock carbs both small and large opening and also have a WT324. what Im wondering is if it is worth shopping around for just the right carb or will the ones that come with the engines be enough. I know with full size cars you can over carb something real easy. Thats what I dont want to do. If you have specific carbs numbers, great! Ill look for those, if its just throat size it will help me as well. I cant say whay a help this web site has been to me! Thank You Kindly for any answers in advance.