With this cold weather we've been having, Dan's Briggs bike was slow to get going. So I found him some choke parts and he installed them and was able to retain his velocity stack. Now it starts every time. He put an acorn nut on the outside for easy reach. Then he was concerned about the small amount of oil his Whizzer holds and decided to make his breather into a tall one. It came out real nice and he added 2 ounces of oil. He also added a screen between his carb and velocity stack.