Utility ATV Fuel Petcocks

Frequently Asked Questions

• What’s the difference between manual and vacuum fuel petcocks?

  Manual petcocks are lever-operated (ON/RES/OFF), simple, and often flow more, but you must turn them OFF after rides. Vacuum-operated units open with engine vacuum and shut automatically for added safety and storage convenience.
• Are these petcocks for carbureted or fuel-injected bikes?

  They’re designed for carbureted machines; fuel-injected systems typically don’t use a petcock. Confirm your fueling type before ordering.
• What do ON, RES, and OFF positions do, and when is reserve helpful?

  ON feeds the main fuel supply, RES draws from the lower portion of the tank to extend range, and OFF shuts flow for storage or service. Choose a model with OFF if you want manual shutoff security.
• How do I choose the right thread type and outlet orientation?

  Match the petcock’s thread pitch/size to your tank bung and pick left, right, or vertical outlets that align cleanly with your fuel line and carb. If selecting a vacuum type, ensure you have a suitable vacuum port and hose routing.
• Which features boost durability and flow for rough terrain or performance builds?

  Look for high-flow designs, robust brass or chrome construction, and ethanol-resistant seals/diaphragms; built-in filters help keep debris from clogging carbs. Rebuildable internals simplify long-term maintenance.