Today’s post is about those annoying rubber boots that attach your carburetors to the spigots on the head(s).

dry brittle old carb boots

Often on old project bikes these are hardened and brittle, most of the time you can get the carbs out but it is almost impossible to get them back in. One thing that greatly helps is to take a heat gun and heat them up to soften them. Some people on the net have removed them and placed them in very hot water. Regardless of the method a small amount heat will help get them soft enough to reinstall the carbs. Just do not use an open flame or you will end up with a charred & useless mess. On some motorcycles these bolt to the head and on others they clamp to spigots cast into the head. If you are dealing with removal of old intake boots from a set of spigots like shown in the picture above prepare to be very patient. Don’t just grab a big screwdriver & start prying! First loosen & completely remove all of the clamps, then twist and pull them by hand until they will at least wiggle & turn on the spigots. If they still won’t come off you have to decide if it is worth the risk to pry them off. Choose your leverage points very carefully, if you have any doubt at all about being able to remove them safely or if you are working on a rare or valuable antique or classic machine this is where you break out a good sharp utility knife & cut them off. The cooling fins and other castings on most motorcycles are very thin and will often break before an old piece of dry rotted rubber will,so better to be safe than sorry.

intake manifold clamps

Also be sure to look at the clamps when removing the boots. They are not just straight rubber hoses, often one end is bigger than the other, and the clamps are 2 different sizes as on this Honda CB650. The intake manifolds only fit one way but they have directional arrows on them, the clamps are not marked so be sure you note which ones go where.

That’s all for tonight, until next time have a fantastic life!