Moose Offroad Choke Plunger Rebuild Kit – Honda CRF150R / CRF250R / CRF250X / CRF450R / CRF450X, Suzuki RM‑Z250, Kawasaki KX250F (1990–2020) – OEM‑Spec Fuel Enrichment Repair

OVERVIEW

The Moose Racing 1003‑1864 Hot Start Plunger Rebuild Kit is engineered to restore proper hot start function and reliable engine operation for specific off-road motorcycles. This complete assembly resolves hard-starting issues triggered by worn or seized internal plunger components. It delivers every necessary rebuild part to fix a stuck mechanism, serving as an essential component for successful carburetor maintenance.

ENGINEERING & PERFORMANCE

By integrating fresh O-rings, springs, and boots into the hot start assembly, this kit eliminates compromised seals that cause sticking or failure. The included retaining nut and cable guide ensure mechanical alignment returns to factory standards. This precise engineering corrects poor running conditions linked to degraded plungers, ensuring the choke system engages smoothly without damaging other carburetor internals.

KEY FEATURES

• Complete rebuild kit includes O-rings, springs, boots, retaining nut, and cable guide
• Restores proper hot start function to significantly improve starting performance
• Resolves difficult starting issues often caused by worn or seized plunger components
• Prevents recurring hard-start failures when damaged or missing parts are replaced
• Serves as the primary solution for stuck plungers found during carburetor work
• Provides a full array of materials needed for a secure and lasting rebuild
• Compatible with a wide range of Honda, Suzuki, and Kawasaki platform engines

TECHNICAL SPECIFICATIONS

• Brand: Moose Racing
• Part Name: Hot Start Plunger Rebuild Kit
• Part Number: 1003-1864
• Component Type: Carburetor hot start plunger repair kit
• Core Materials: Rubber seals (O-rings), metal springs, steel retaining nut, boots
• Kit Contents: O-rings, springs, boots, retaining nut, cable guide (where required)
• Supported Years: 2003–2020 (model dependent; see fitment list)
• Genuine Application: Direct replacement for failed original plunger assemblies

FITMENT

• Honda CRF150RB Expert (2007–2020)
• Honda CRF150R (2007–2020)
• Honda CRF450R (2002–2008)
• Honda CRF450X (2005–2017)
• Honda CRF250X (2004–2017)
• Honda CRF250R (2004–2009)
• Suzuki RM-Z250 (2004–2006)
• Kawasaki KX250F (2004–2005)

WHY RIDERS CHOOSE THIS

Riders select this kit because partial repairs often fail when the remaining hidden components are also fatigued or scored. A full rebuild with every spring, seal, and boot guarantees that the cold start mechanism operates exactly as intended after installation. Using this specific collection of parts eliminates the guesswork and inventory gaps common during carburetor overhauls. It ensures that the motorcycle responds instantly to the hot start lever without hesitation or mechanical binding.