Moose Racing 1003‑1782 Choke Plunger Rebuild Kit – Fits Honda TRX250 FourTrax / ATC250ES Big Red / ATC250SX (1986–1987)

OVERVIEW

This complete choke plunger rebuild kit restores proper engine operation and stabilizes cold-start performance on vintage Honda motorcycles and ATVs. Designed specifically for carbureted applications, it replaces worn or seized mechanical choke components without requiring a full carburetor disassembly. Featuring integrated rubber seals and precision-tensioned springs, it guarantees reliable air-fuel management across demanding riding environments.

ENGINEERING & PERFORMANCE

The rebuilt choke assembly delivers consistent intake tuning during cranking phases and gradual warm-up cycles. Heavy-duty synthetic boots and tightly wound metal springs withstand high-frequency vibration and thermal expansion typical of early production units. The direct-mount profile preserves original factory clearances, which prevents unwanted vacuum ingress that triggers flat spots and stalling. This calibrated approach ensures crisp throttle recovery and stable minimum RPMs right after swap completion.

KEY FEATURES

• Complete choke plunger rebuild kit targeted at vintage platforms
• Gathers critical O-rings, springs, reinforced boots, and retaining nuts
• Tackles poor idle and fuel starvation stemming from stuck mechanical plungers
• Doubles up on hardware so builders can fully outfit twin-carb arrangements
• Catches frictionless against original channel shapes for instant seating
• Cuts hunting and inventory costs by bundling scattered OEM fragments into one purchase
• Ranks as an essential step whenever standard carburetor overhauls expose rusted internals
• Maintains sealed boundaries to stop unmeasured airflow from altering mixture ratios
• Lays groundwork for smoother cold cranks and improved transition to wide-open throttle

TECHNICAL SPECIFICATIONS

• Brand: Moose Racing
• Part Name: Choke Plunger Rebuild Kit
• Component Type: Carburetor part
• Supported Years: 1986–1987
• Compatible Trims: TRX250 FourTrax, ATC250ES Big Red, ATC250SX

FITMENT

• Honda TRX250 FourTrax (1986–1987)
• Honda ATC250ES Big Red (1986–1987)
• Honda ATC250SX (1986–1987)

WHY RIDERS CHOOSE THIS

Enthusiasts pick up this kit because fixing a functional choke plunger instantly cures prolonged kick-start delays and erratic low-speed hesitation on aging machines. The matched seals and flexible boots seal the intake pathway completely, keeping unmetered atmospheric air out of the pilot circuit. Because the geometry mirrors stock factory specifications, linkage hardware engages cleanly without binding or dead travel. It integrates seamlessly behind vintage air boxes, delivering dependable winter ignition and predictable road manners straight from your workbench.