Adjustable Needle O-Ring for Leak-Free Raptor Tuning - Superseded by 691606

No more frustrating leaks during tweaks: The Adj. Needle O-Ring (SKU 555122) for Briggs Raptor flatheads, superseded by 691606, forms a tight barrier at the needle seat. It holds your fuel mixture settings firm, allowing fine adjustments without seepage that could alter ratios mid-race.

• Maintains seal integrity under pressure and vibration.
• Supports precise leaning or richening for track conditions.
• Quick to replace, aiding fast carb overhauls.

This O-ring empowers tuners to experiment confidently, organizing tools around reliable seals that keep engines running clean and strong. The result? A kart that responds with razor-sharp accuracy, helping you outpace rivals through superior mixture control and sustained speed.