BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | TIRE & SERVICE SERVICE & MAINTENANCE TOOLS SERVICE & MAINTENANCE TOOLS 562 DESCRIPTION PART # Complete O2 bung installation kit 3807-0378 DESCRIPTION PART # Refill kit 3807-0398 COMPLETE O2 BUNG INSTALLATION KIT • Kit to add 18 mm x 1.5” threaded bungs for O2 sensors and O2 tuning samplers • Remove heat shields, install bung and tune; when completed, use included screw and copper washer to seal bung and then replace heat shield for unaltered finish •No pump or sampling tube required and allows both cylinders to easily be monitored at the same time •No welding • Includes one hydraulic insertion tool, one drill bit, two O2 sampler blocks, tubing, 25 Rivnuts, 25 screws and 25 copper washers, all contained in plastic case •Refill kit PART #3807-0398 includes 25 each of bungs, plugs and copper washers, sold separately •Made in the U.S.A. DESCRIPTION PART # 57 mm (pr.) 1860-2372 57 mm (10 pk.) 1860-2373 60 mm (pr.) 1860-2374 60 mm (10 pk.) 1860-2375 63 mm (pr.) 1860-2376 63 mm (10 pk.) 1860-2377 DESCRIPTION PART # 67 mm (pr.) 1860-2378 67 mm (10 pk.) 1860-2379 70 mm (pr.) 1860-2380 70 mm (10 pk.) 1860-2381 75 mm (pr.) 1860-2382 75 mm (10 pk.) 1860-2383 DESCRIPTION PART # 80 mm (pr.) 1860-2384 80 mm (10 pk.) 1860-2385 83 mm (pr.) 1860-2386 83 mm (10 pk.) 1860-2387 90 mm (pr.) 1860-2388 90 mm (10 pk.) 1860-2389 DESCRIPTION PART # 95 mm (pr.) 1860-2390 95 mm (10 pk.) 1860-2391 100 mm (pr.) 1860-2392 100 mm (10 pk.) 1860-2393 Dealer kit 1860-2394 EXHAUST SPRINGS • High quality, zinc-plated tempered spring wire •Sold in various quantities; please see chart DESCRIPTION PART # Exhaust bung 3850-0575 EXHAUST BUNG •2- and 4-stroke compatible •Tapered design fits most exhaust diameters •Silicone rubber core construction is sturdy and durable •Supplied with lanyard for easy removal and storage •Prevents water or contaminates entering the exhaust during cleaning •Protects your engine • Directions for use: 1. Ensure the exhaust is fully cooled, 2. For 2-stroke exhaust remove the black silicone sleeve from the bung, for 4-stroke exhaust keep the black silicone sleeve on the bung, 3. Insert and twist the exhaust bung into the end of the exhaust to form a perfect seal, 4. Carry out your cleaning and maintenance routine and 5.Always remove before starting the engine 3807-0378 1860-2372
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