The Yamaha big Bear 400 was a tough and reliable quad that can get the task done. Its remarkable power was a perfect trade-off for top-end speed, and also its rough appeal, towing capabilities, and also mighty engine to be a big hit through consumers. World adored this wheeler, even with the imperfections.

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Often compared to a Fourtrax 300 and also confused through a Wolverine, the Yamaha large Bear 400 make itself rather a complying with during that 12-year production run. Sporting a mid-size chassis, dual driveline modes, smooth transmission, and a powerful engine, the huge Bear to be a breakthrough because that Yamaha.

The quad continued to be true to Yamaha’s reputation of producing reliable and durable vehicles till the an extremely end – so much so the a lot of Yamaha enthusiasm were saddened by the discontinuation of the model in 2012. This check out will enlighten friend on why the huge Bear is therefore well-loved through consumers, as you learn around its specs and also features, highs and also lows, and more.


The Revolutionary 4×4

The Yamaha large Bear 400 is the 17th model released through Yamaha due to the fact that its 1980 Tri-Moto introduced in the U.S. The Yamaha big Bear 400 was initially designed for work and carried the very same terminology as its 1987 350-class predecessor. It was not the very first ATV to have 4×4 specifications, yet it counter it by gift the first with completely camouflaged bodywork, make it well-known as a searching vehicle. The four-wheeler was developed from 2000 to 2012 before it ceased production to construct the remainder of Yamaha’s ATV lineup.

Yamaha acquired busy throughout the huge Bear’s production run, developing several different trims across all model years:

Yamaha large Bear Trims

2000 Yamaha large Bear 400YFM400FWNM-FWNMC-FWNHM (4WD Buckmaster)YFM400M-NMC (2WD 4WD)2001 Yamaha huge Bear 400YFM400FHN-FN (4WD Hunter)YFM400HN-N (2WD Realtree)2002 Yamaha huge Bear 400YFM400P-HP (2X4 Hunter)YFM400FP (4X4)2003 Yamaha huge Bear 400YFM400FWR (4X4)YFM400NR (400 2WD)2004 Yamaha huge Bear 400 (YFM40S 2WD)2004 Yamaha huge Bear 400 (YFM40FS 4X4)2005 Yamaha large Bear 400 (YFM40FT 4X4)2006 Yamaha huge Bear 400 (YFM40FV 4X4)2007 Yamaha huge Bear 400YFM40FBEW-FBHW-FBW (4WD Hunter IRS experimenting Edition)2008 Yamaha large Bear 400YFM400FBHX-FBXGR-FBXL-FBXR 4WD2009 Yamaha large Bear 400 (FM400FB 4WD)2010 Yamaha big Bear 400 (YFM400FB 4WD)2011 Yamaha huge Bear 400YFM400FBAGR-FBAL-FBHA large Bear 4WD2012 Yamaha big Bear 400 (YFM400FB 4WD)

If there is noþeles that ideal signifies the carrier surname of this model, that is the engine. The strength mill the this quad is equivalent to a V8 fitted right into a mid-size 4×4. It has actually a dust bike-style BSR33 carb, a 4-gallon gas tank, a huge oil-cooler, and also a CDI ignition. Top top the outside, the quad’s flexible plastic fenders room indestructible, easy to clean and also offer sufficient splash protection. Front and also rear bumpers safeguard the mechanical components, and racks provide plenty of cargo space. Electronics and fuses space under the seat, together with the airbox and also battery.

2000 Yamaha huge Bear 400 Specs (YFM400FNM)

Engine– it is powered by a four-stroke, air-cooled, single-cylinder SOHC engine. The forward-inclined power mill has a bore-stroke proportion of 83 × 71.5 millimeter (3.27 × 2.82 inches). The Yamaha huge Bear 400 4×4 has actually an engine displacement that 386 cubic centimeters, a compression ratio of 8.6:1, and also a wet sump lubrication system. A 33-mm Mikuni BSR carburetor handles the air-fuel mixture. Fuel tank capacity is 3.96 united state gallons/15 liters, through 1.06 us gallons/4 liters reserve.Brakes– Front twin hydraulic bowl brakes and a sealed mechanical drum at the rear administer the large Bear protecting against power.Suspension– The quad attributes an independent double-wishbone front and also swing eight rear suspension through five-way preload-adjustable shocks because that both that permit 5.9 inches of wheel travel. The 2004 Yamaha huge Bear 400 had high-quality Showa spring/shocks front and also rear. For all models, the vehicle’s IRS offers maximum floor clearance and excellent maneuverability on diverse terrain.Dimensions– The quad’s as whole dimensions are 79 x 43.7 x 46.1 inches (2,007 x 1,111 x 1,172 millimeters – together x W x H). The minimum floor clearance is 9.65 inches, while the minimum transforming radius is 124 inches. The car wheelbase is 48.4 inches. Curb load is 266 Kg/586 lbs. Towing volume is 904 lbs/410 Kg, add to 265 lbs/120.2 Kg merged rack capacity.Exterior– that is made up of a steel tube framework (with a 4° caster angle and also 21-mm trail) and also plastic body material. The complete floorboard is ~ above the driver’s side. The wheeler comes with standard handgrips, fenders, prior A-arm skid plate, and front/rear bash plates. Instrumentation is composed of a pilgrimage odometer, speedometer, and temperature/fuel indicators, and you will find 88 lbs/39.9 Kg precious of extra warehouse under the seat.

The Yamaha huge Bear 400 had actually 30 trims during its 12-year manufacturing run based on online references and research.

What huge Bear owner Love around Their Quad

Big be afflicted with owners have a point or two that lock love about the vehicle. For some, the is the auto clutch manual change and five-speed transmission. For rock crawlers, the is the supervisor low an initial gear. It is the absence of a CVT belt (according to them, this belts require more to maintain). And for the functioning John, it is the wheeler’s mid-range power and towing capacity.

Riders appreciate missing out on having actually a turbo lag once letting off and quickly getting earlier on the throttle. Farmers marvel at the quad’s capacity to pull 12-foot logs v no difficulty. Human being who have bought the automobile say that they do a an excellent choice in choosing the huge Bear over the Wolverine, and also most choose the manual-shift transmissions over the much more recent trims that come out.

Yamaha huge Bear 400 height Speed

The large Bear height speed is 52 mph on stock – yet only averages approximately 45 mph for most owners. When the quad is intended for tough work and also low-end grunt, there room a couple of Yamaha big Bear 400 components that you deserve to upgrade to improve its top-end speed and also power delivery and its look and off-road readiness. Right here are a few of them:

2-inch clip liftSnorkel kit and brand-new fuel currently (great for water crossing and also mud holes)LED lamp to replace the Krypton bulbsWinchHMF performance exhaustBigger key jet in the carburetor for more powerFull ship steel skid plates and also A-arm protectors (if you do a most rock crawling)

A word to the wise – power mods to her engine will certainly not make you fight a top speed of above 60 mph as result of the equipment ratio on this wheelers – meaning changing the gear ratio is the foremost thing you need to do. If you intend to keep the straight drive shaft and also rims stock, the only means to go is to gain bigger tires. However, tires bigger 보다 25″ (stock to mount) are tough to come by – girlfriend may finish up spending over $750 for practice rims and rubber.

More around the big Bear

What fuel should I use for the Yamaha big Bear 400? You have to use constant unleaded gasoline v a pump Octane variety of 86+ and a study Octane variety of 91 or higher. 4 united state gal/15 liters should be sufficient to fill her tank. Leaded gasoline have the right to be used yet only together a last resort. Also, use fuel with less than 10% ethanol and less 보다 5% methanol, as these variants may damages the fuel mechanism or cause car performance issues.How perform you change the oil top top a Yamaha huge Bear 400? Before you start, make certain to have a socket wrench set, one oil catch basin, brand-new oil, and also a filter. As soon as you have these, girlfriend will very first have come park your ATV ~ above level ground, accessibility the drain plug near the bottom that the oil pan, drainpipe out every the oil, screw a brand-new oil filter in place, to fill the an equipment with the recommended amount the oil, then start your ATV and check the the oil gauge is in ~ the common range.Does the Yamaha big Bear 400 have flaws? For secondhand large Bear purchases, the wheeler would certainly naturally have actually washed-out plastics and also rusted racks. Aftermarket brake shoes are too tiny for the rear drum. Furthermore, some big Bears suffer recurring, unsure battery drain.Where is the VIN top top a Yamaha large Bear 400? The VIN is located on the steering shaft stamped on one aluminum plate. If friend cannot discover it there, look on the left side of the structure behind the prior tires or the lower structure rail in ~ the engine.What is the Yamaha big Bear worth? The list prices of the Yamaha large Bear 400 variety from $5,399 come $6,599, depending on model year, trim, and included accessories. Camo-styled trims are the most expensive of the lot. The mean retail value is between $1,175 and also $4,050 based on Nada travel guide pricing. Kelly Blue publication value because that a 2001 Yamaha huge Bear 400 is $1,510 as soon as trading in in ~ a dealership.

About Yamaha

Yamaha motor Company restricted is well-known as a human being leader in motorsports that has spawned the ATV sector in the ’80s. The Japanese continue to develop a broad array that life-enriching products and services – including motorcycles, off-road vehicles, an individual watercraft, speed boats, and also outboard motors. The mission the creatingKandois ever-present in the product offerings and also services. In ~ present, Yamaha continues to innovate, excite, accumulate confidence, and also strengthen ties to broaden its offerings worldwide.

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Conclusion – Yamaha huge Bear 400

The Yamaha big Bear 400 is challenging as nails and also thrives under battlefield conditions. Even if it is you are on 10,000 feet that elevation, in very high or sub-zero temperatures, or top top slick or rough circuit terrain, that never falls short to deliver. It might not be a hotshot through today’s standards. Yet during that is time, that was one of the most sophisticated multifunctional four-wheelers ~ above the market. This revolutionary four-wheeler has and also continues to knife itself a exceptional reputation.