If you can stand to, put a Super Cub cowl on it. Fiberglass Specialities has them. My 30cc Homey fit carb fit completely inside, without a velocity stack. Of course you will have to have the spark plug out the bottom. If you used a Wacker Engines pitts muffler it would leave the cowl pretty much un-molested. My old Cub has been around the block so many times I just let it all hang out. Forget the 18cc, 25cc-30cc is just right for a 1/4 Cub. A friend just finished a 25cc Toro and he loves it. You might take a look ant one. I think they come out lighter than a Homey, Poulan, or Ryobi.