Question about carbs

Quick question about carbs form a noob. What good does rejetting the carbs actually do. And how much work / money would be associated with a project like this.

Thanks,

David

Quick question about carbs form a noob. What good does rejetting the carbs actually do. And how much work / money would be associated with a project like this.

Thanks,

David

Fuel is metered to the engine by means of vacuum that flows through the throat of the carb. While some carbs have a small booster pump to aid in throttle response, most carbs rely on small tubes, or orifices that allow the fuel to flow or be sucked into the intake by the vacuum. The jets are in place to limit the amount of fuel that is allowed to flow at full throttle. The jet is nothing more than a restriction to the flow of fuel.

Rejetting of carbs is something that is best left to someone experienced in the process. Too big of a jet allows too much fuel to enter the cylinder and causes the bike to run rich.(Black Smoke out of thge exhaust). This rich condition not only wastes fuel, but it could also wash down the cylinder walls and cause ring and cylinder damage and eventually piston seizure.

Too small of a jet will cause a lean condition. Too little fuel for the amount of oxygen in the cylinder. This will cause the bike to run hot, and after time can cause burning or melting of the piston and rings.

Rejetting is very easy after someine shows you the proper procedures, and there are charts that will tell you the proper jet size to start with for your application and addon accessories. Better to get it done by the pros, or someone experienced in the process of rejetting.