OLIFANT Carburetor for Yamaha ATV — Direct-Fit Replacement for Big Bear/Grizzly/Bruin (33mm Intake, 49mm Airbox)

OLIFANT replacement carburetor engineered to restore fuel delivery and throttle response for select Yamaha ATVs from 2000–2014.

This high-compatibility carburetor is a direct-fit aftermarket replacement for many Yamaha models including Big Bear, Grizzly, Kodiak, Wolverine and Bruin series. It reproduces the key mounting and bore dimensions of the original equipment, helping you get back on the trail without extensive modification. The unit is built to match several OEM part numbers and includes intake and airbox diameter specs so you can confirm fitment before ordering.

Which Yamaha models and years will this carburetor fit?

This OLIFANT carburetor covers a broad range of Yamaha ATVs across multiple model families and years. It replaces OEM numbers commonly associated with Big Bear, Grizzly, Kodiak, Bruin and Wolverine models, making it suitable for owners of older machines where the original carburetor has worn or failed.

• Big Bear 400 (YFM400) — 2000–2012
• Big Bear/250 (YFM250B) — 2007–2009; Bruin 250 (YFM250) — 2005–2006
• Grizzly 350/400/450 series — covers many 2007–2014 year ranges
• Kodiak 400/450 and Wolverine 350/450 variants — common mid-2000s models
• Matches multiple OE part numbers (see product listing for full reference)

What are the exact dimensions and why do they matter?

Knowing the intake and airbox diameters ensures the replacement carburetor will mate correctly to both the intake manifold and the air filter housing. Proper diameter alignment avoids airflow leaks and simplifies installation so you don’t need extra adapters or machining.

• Intake side inner diameter: 33 mm — fits the manifold inlet specified for these models
• Intake side outer diameter: 38 mm — for clamp seating and seal fit
• Air filter side inner diameter: 49 mm — matches standard airbox opening dimensions
• Air filter side outer diameter: 52 mm — gives clamp clearance and secure mounting

How does installation and compatibility check work?

Installation typically follows the same steps as the original carburetor: remove the old unit, compare mounting points and bore sizes, transfer any usable linkages or sensors, and secure the new carb. Verifying the listed OE numbers and the diameter specs before purchase reduces the chance of incompatibility.

• Compare this unit’s dimensions to the existing carb and airbox openings
• Cross-check OEM numbers in the product listing with your parts manual
• Transfer throttle cables, choke lever, and any brackets from the original when possible
• Use new clamps and gaskets for a leak-free seal during installation

What performance or maintenance benefits can I expect?

Replacing a worn or clogged carburetor restores consistent fuel metering and throttle response, which can improve rideability and reduce stalling or poor idling. While not a performance upgrade over a properly working OEM carb, a fresh unit removes variables caused by age, varnish, or corrosion.

• Restores predictable idling and throttle transition
• Reduces hesitation caused by clogged jets or passages
• Helps maintain fuel economy and throttle control on varied terrain
• Simplifies future tune-ups by starting from a clean, serviceable baseline

Who is this for: This OLIFANT carburetor is intended for owners and mechanics of Yamaha ATVs from the early 2000s to mid-2010s who need a direct-replacement unit that matches common OEM references and bore sizes. It's ideal if your machine shows symptoms of fuel delivery issues, if the original part is damaged, or if you prefer replacing an aging carburetor with a ready-to-install aftermarket unit. Always confirm model year and OEM cross-reference numbers before purchase to ensure correct fitment.