Top Speed of Yamaha Raptor 660 (Also Increasing)
If you’re an ATV enthusiast, you’ve probably wondered about the top speed of the legendary Yamaha Raptor 660. With its sporty styling and powerful 660cc engine, this quad is built for speed. But just how fast can you go on a Raptor 660?
In this in-depth article, we’ll cover everything you need to know about the Raptor 660’s top speed capabilities:
- Stock top speed specs straight from Yamaha
- How modifications can add more speed
- Maxing out the Raptor 660’s velocity potential
- How the transmission, weight, and other factors affect acceleration
- Top speed compared to other 400-700cc sport ATVs
- The pros and cons of chasing maximum speed
Plus, we’ll look at tips to optimize your Raptor’s speed and discuss whether the 660 has enough power to satisfy true speed demons. Let’s get started!
Table of Contents
What Is the Top Speed of a Stock Raptor 660?
When evaluating the Raptor 660’s capabilities, the first question is: how fast can you go in stock, unmodified form?
According to Yamaha’s official specs, the top speed of a completely stock Raptor 660 is 75 mph (120 km/h).
This top velocity is achieved through the Raptor’s powerful 660cc, five-valve, liquid-cooled and fuel-injected engine. This four-stroke powerplant churns out around 48 horsepower, allowing the 350-pound machine to hit high speeds quickly.
A five-speed manual transmission with reverse puts all that power to the ground efficiently. And with 7.1 inches of long travel suspension in the front and 9.1 inches in the rear, the Raptor 660 can handle its speed well on rough terrain.
For a stock quad, 75 mph is pretty darn fast! It provides most recreational riders with plenty of thrilling speed potential without going overboard.
How Much Faster Can a Modified Raptor 660 Go?
While a bone-stock Raptor 660 is certainly no slouch, many owners are hungry for even more velocity. With some targeted modifications, you can unlock the Raptor’s full speed potential.
Here are some common mods that will add top speed:
- Exhaust system: An aftermarket exhaust like the MRD X-Pro can add 3-5 mph. Less restrictive exhaust improves airflow.
- Air filter: A free-flowing performance air filter like the Twin Air Pro-Flow kit allows more air into the engine. Good for 1-3 mph.
- Gearing changes: Going up one or two teeth on the rear sprocket increases top speed while sacrificing some acceleration.
- Fuel programmer: An aftermarket fuel injection module tweaks the fuel mapping for more power. Adds around 3 mph.
With these basic bolt-on upgrades, expect the Raptor 660 top speed to increase from the stock 75 mph up to 85-90+ mph! Of course, more extreme engine builds and turbocharging can unlock even greater speeds over 100 mph.
Tips to Maximize Raptor 660 Top Speed
To push your Raptor 660 to its absolute maximum velocity potential, keep these tips in mind:
- Start with engine intake and exhaust: Focus first on breathing mods like air filter, exhaust, fuel programmer. Opening up airflow adds power.
- Jetting: If adding an exhaust, get a professional jetting to complement it. Correct jetting optimizes fuel efficiency.
- Quality tires: Maximize traction by installing the stickiest rubber you can. Tires are key to applying more power to the ground.
- Suspension set-up: Dial in suspension sag and rebound damping so your Raptor stays planted at speed. Proper set-up prevents wallowing.
- Chassis protection: Engine guards, skid plates, grab bars give you the confidence to open it up without worrying about damage from falls.
- Gear appropriately: Use lower gears to hit max acceleration. Higher gears allow you to keep pushing top speed once at maximum velocity.
- Weight reduction: Remove unneeded racks, etc. to reduce pounds. Less weight requires less power to hit high speeds.
Take the time to modify and set up your Raptor 660 methodically using these tips. You’ll be able to extract every ounce of speed potential from this incredibly capable sport quad.
Yamaha Raptor 660 Top Speed Specs
To further understand the factors that affect this ATV’s velocity capabilities, let’s look at some key specs:
| Spec | Measurement |
|---|---|
| Engine | 660cc liquid-cooled dry sump 4-stroke; SOHC; 5 valves |
| Bore x stroke | 100mm x 84mm |
| Compression ratio | 9.2:1 |
| Fueling | Dual-intake 33-mm Mikuni carburetors |
| Starting system | Electric with auxiliary recoil |
| Transmission | 5-speed with reverse |
| Final drive | O-ring chain |
| Horsepower | Approx. 36 HP @ 7,500 RPM |
| Torque | Approx. 39 ft-lbs @ 7,000 RPM |
| Front suspension | Independent double wishbone; 7.1 inches travel |
| Rear suspension | Swingarm; 9.1 inches travel |
| Front brakes | Dual hydraulic disc |
| Rear brakes | Sealed mechanical drum |
| Front tires | AT 25×8-12 |
| Rear tires | AT 25×10-12 |
| Wheelbase | 49 inches |
| Seat height | 31.9 inches |
| Fuel capacity | 3.2 gallons |
| Curb weight | 398 pounds |
As these specs demonstrate, the Raptor 660 strikes an impressive balance between power, weight, suspension travel, and other factors that contribute to achieving a high top speed.
How Does The Raptor 660 Reach Those High Speeds?
A sport ATV’s ability to reach fast top speeds ultimately comes down to power-to-weight ratio. By generating abundant horsepower and torque yet keeping pounds to a minimum, quads like the Raptor 660 can hit eye-watering velocities.
Here are the key elements that enable this model to hit 75+ mph:
Strong Mid-Range Powerplant
At the heart of the Raptor 660 is its proven 660cc single cylinder engine. This four-stroke motor utilizes liquid cooling, four valves per cylinder, and dual-intake 33-mm Mikuni carburetors to put out stout mid-range power.
While it can’t match the top-end power of 700cc+ motors, the Raptor 660 motor’s substantial torque meat concentrated in the mid-range gives it great acceleration. Yamaha engineers aimed for usable power rather than just sky-high horsepower numbers.
Five-Speed Manual Transmission
Power is nothing if you can’t put it to the ground efficiently. That’s where the Raptor’s five-speed manual transmission comes in.
Having multiple gear ratios allows you to find the sweat spot for acceleration or top speed as conditions dictate. The Raptor 660 transmission is silky smooth and precise – a great match to the engine.
Strong Yet Lightweight Chassis
The Raptor 660 is powered by steel A-arms up front and an aluminum swingarm out back. This chassis provides a stiff, durable and lightweight platform that enhances handling and minimizes unsprung weight.
Shock absorbers with over 7 inches of travel soak up rough trails while providing good resistance to bottoming on big hits or landings from air time.
Excellent Power-To-Weight Ratio
Weighing in at under 398 pounds ready to ride with 3.2 gallons of fuel on board, the Raptor 660 boasts an excellent power-to-weight ratio. Less heft for the engine to pull around equals greater speed potential.
Yet thanks to its stout frame, You don’t feel like you’re riding an underpowered lightweight either. The Raptor chasis balances minimal poundage with a well-planted, substantial feel on the trail.
Dual Hydraulic Disc Brakes
Slowing a nearly 400-pound machine from 75 mph takes serious stopping power. The Raptor 660 delivers with dual hydraulic discs up front and a sealed rear drum brake.
Combined with great ergonomics for braking leverage, you can scrub speed quickly with great control. Confidence in the brakes is important when pushing the limits in terms of speed.
Does Raptor 660 Top Speed Measure Up Against Similar ATVs?
Yamaha positioned the Raptor 660 directly against other mainstream 400-700cc sport ATVs. How does this iconic middleweight stack up in terms of top speed capability?
Here’s a look at how max velocity of the Raptor 660 compares to some of its main rivals:
| ATV Model | Engine Size | Horsepower | Top Speed (Stock) |
|---|---|---|---|
| Yamaha Raptor 660 | 660cc | 48 HP | 75 mph |
| Honda TRX450R | 445cc | 40 HP | 68 mph |
| Suzuki LT-R450 | 449cc | 46 HP | 72 mph |
| Kawasaki KFX450R | 449cc | 44 HP | 70 mph |
| Arctic Cat DVX 400 | 400cc | 30 HP | 63 mph |
| Yamaha Banshee 350 | 347cc | 43 HP | 68 mph |
| Yamaha Raptor 700 | 686cc | 52 HP | 80 mph |
| Suzuki LT-R700 | 695cc | 48 HP | 79 mph |
| Kawasaki KFX700 | 695cc | 55 HP | 85 mph |
As the comparison shows, the Raptor 660 is right in the heart of the 400-700cc market in terms of top speed potential. It beats most 400cc class models yet can’t quite match the velocity of the most powerful 700s.
The Raptor’s top speed complements its billing as the ultimate do-it-all sport ATV. It’s fast enough for wide-open dune sessions yet tame enough for family trail riding. Novices won’t get into trouble while experts can still go plenty fast.
Of course, mods like exhaust, clutching and gearing changes can close the gap in speed between the Raptor 660 and the 700cc monsters. But even stock, it hits a competitive top speed for its class and displacement.
The Pros and Cons of Raptor 660 Top Speed
As with any machine, chasing maximum velocity comes with trade-offs. Before you get fixated on wringing out every last mph, consider the following pros and cons when evaluating Raptor 660 top speed:
Pros
- Quick enough for most: Even stock, 75 mph will satisfy 90% of recreational riders. You can have a blast without hitting triple digits.
- Handles high speed well: Confidence inspiring chassis and suspension provides stability and control up to 75 mph and beyond.
- Rewarding power delivery: Strong mid-range power and torque gives you great acceleration even at highway speeds.
- Leaves room to grow: Novices won’t get overwhelmed. But experts can modify and push the 660 to go even faster over time.
Cons
- Expert riders may want more: Hardcore racers and dune fanatics might be frustrated with stock top speed limit.
- Mods get expensive: Unlocking max speed requires pouring money into engine work and bolt-ons.
- Safety concerns: Excessive speed heightens risk of accidents and injuries. Know your own limits.
- Reduced reliability: extractIng every last mph stresses components and requires more maintenance.
As with any machine designed for speed, finding the sweet spot is key. While a modified Raptor 660 can exceed 100 mph, most find that 75-85 mph provides the best blend of thrilling speed and usable power. Just be sure to take high-speed safety seriously.
What Are Some Similar ATVs to Compare?
To put the Raptor 660’s capabilities in context, let’s briefly compare it to some similar 400cc and 700cc sport quads:
- Honda TRX450R: The Raptor’s main 450cc rival. Very quick but can’t quite match 660’s power and speed. More playful handling.
- Yamaha YFZ450R: YFZ450R has equivalent power but in a lighter, racier package. Faster overall but less stability at speed and on trails.
- Suzuki LT-R700: LT-R700 makes almost as much power as the Raptor 660 but in a faster-revving package. Top speed close to the 660’s.
- Arctic Cat 700 H1: One of the fastest in the 700 class thanks to its 95 horsepower triple cylinder engine. Easily exceeds 100 mph modified.
- Can-Am Renegade X xc 1000R: Big bore 1000cc V-twin makes more than twice the power of the 660. Ton of speed potential but very heavy.
As you can see, there are plenty of ways to step up or down from the Raptor 660’s power and performance. Test ride some other quads and decide what’s best for your needs and riding style.
What Model Years of Raptor 660 Are Fastest?
The Raptor 660 had an exceptionally long production run from its introduction in 2001 all the way until 2018. Are there certain model years that have more speed potential than others?
In general, the evolution of the Raptor 660 over its life was relatively minor. But here are a few differences in terms of top speed for various model years:
- 2001-2005: The original models make a little less peak power. Some lack fuel injection. But have attractive vintage appeal.
- 2006-2009: Slight engine updates with fuel injection across all models by 2009. Performance improved while retaining bulletproof reliability.
- 2010-2018: Final years see fully modernized aesthetics and ergonomics. Top speeds remain similar but with small power gains.
The best advice is to choose based on condition, service history, and upgrades rather than obsessing over model year. Even a properly maintained 2002 Raptor 660 can still scream, and they are great vintage collector pieces!
| Specs | 2001 | 2006 | 2010 | 2018 |
|---|---|---|---|---|
| Engine | 660cc air & oil cooled | 660cc liquid cooled | Same | Same |
| Carburetion | Mikuni BSR36 x 1 | Fuel injection | Same | Same |
| HP Rating | N/A | 48 HP | Same | Same |
| Weight | 348 lbs | 365 lbs | 375 lbs | 375 lbs |
| Top Speed | 73 mph | 75 mph | 75 mph | 75 mph |
| Transmission | 5-speed manual | Same | Same | Same |
As you can see, top speed remained essentially unchanged throughout the life of the Raptor 660. The main improvements came in the engine cooling, fueling and emissions departments as requirements tightened up.
But again, any well-maintained Raptor 660 regardless of year should deliver roughly the same thrilling speed and performance. You can’t go wrong!
How Much Does a Raptor 660 Cost?
With the Raptor 660 being discontinued as of 2018, you’ll need to look to the used market to find one. Here are some average asking prices on pre-owned examples:
| Model Year | Average Asking Price |
|---|---|
| 2001-2005 | $3,200 – $4,500 |
| 2006-2009 | $4,000 – $5,500 |
| 2010-2018 | $5,000 – $7,000 |
Of course, prices vary a lot depending on overall condition, service history, mileage ridden, and aftermarket mods.
Given their reputation for toughness, you can usually get a good deal on an older, well-used Raptor 660. Just be sure to properly inspect and test ride before buying.
Best Bolt-On Modifications to Increase Raptor 660 Top Speed
Bolt-on mods are a great way to unlock more speed from your Raptor 660 without breaking the bank. Here are the best bang-for-buck upgrades:
- Aftermarket slip-on exhaust like Yoshimura or Two Brothers adds 2-3 mph
- Air filter kit from Twin Air, UNI or PowerBomb increases airflow for 1-2 mph gain
- Gearing changes like larger rear sprocket greatly affect acceleration and top speed
- Fuel programmer optimizes fuel and timing maps for more power
- A Clutch kit with stiffer clutch springs prevents clutch slip at high RPM
- chassis protection like skid plates and grab bars enable more confident riding at speed
Focus on mods that increase power, reduce weight, enhance delivery to the rear wheel and improve chassis performance. An extra 5-10 mph is easily achievable with basic bolt-ons.
Is the Raptor 660 Powerful Enough for Speed Junkies?
For many expert riders, going over 100 mph is the definition of a truly fast ATV. Does the Raptor 660 have enough power to reach this triple digit benchmark?
- Stock: Absolutely not, a completely stock Raptor 660 tops out around 75 mph with its restricted intake, exhaust, and limited engine performance. It’s not even close to 100 mph from the factory.
- Mildly Modified: With simple bolt-on mods like air filter, exhaust, and gearing changes, you can get a Raptor 660 up to around 90 mph if you have a long enough track. But 100 mph would be a big stretch.
- Heavily Modified: To hit 100 mph, you’ll need serious engine work including a big bore kit, high compression pistons, head porting, turbo or supercharger,etc. Basically a built motor purpose built for extreme speed. Most opt for a 700 or 1000cc ATV at that point.
Conclusion: While the Raptor 660 is no speed slouch, it takes major engine modifications to reach 100+ mph. Most 660 owners find that 80-90 mph is more than adequate to have an absolute blast carving up trails, dunes and motocross tracks. Yanking the last 10 mph out of the 660 requires compromises in reliability and rideability that only hardcore speed freaks will accept.
Maintaining Raptor 660 Top Speed
No matter what top speed you are targeting, proper maintenance is crucial to ensuring your Raptor 660 keeps delivering maximum velocity season after season. Here are key maintenance tips:
- Change engine oil regularly. Use quality oil like Yamalube for precise clearances.
- Clean air filter after ever ride, replace frequently. Flowing air filter protects engine.
- Check valve clearances per the service manual specs. Incorrect lash affects power.
- Replace spark plug yearly or more often if needed. Quality plugs optimize combustion.
- Keep intake and exhaust valves de-carbonized to avoid buildup impeding airflow.
- Verify jetting if adding an exhaust. Re-jetting ensures proper fueling.
- Inspect drive belt, sliders, rollers and guides. Replace worn components preventing slippage.
- Lubricate chassis pivots and linkages to minimize binding and friction.
Taking the time to properly service your Raptor 660 pays off with maintained speed and reduced breakdowns. Don’t cut corners on maintenance if you want longevity.
Is the Raptor 660 Too Fast for a Beginner?
With a 75 mph top speed even when bone stock, is the Raptor 660 too much machine for a new ATV rider?
It depends a lot on the person’s maturity level, past experience, and respect for the machine’s power. Here are some factors to consider:
- Power delivery: Very smooth, linear power build makes it less intimidating than some 600s. Easy to control throttle.
- Handling: Heavier and more stable than a 450cc sport quad. Provides confidence inspiring feel.
- Size: Full size chassis doesn’t get pushed around like a small 250cc ATV. But not overly heavy.
- Speed limiting: Rev limiter and speed limiter options from dealer allow lowering top speed until you get experience.
Overall, while the Raptor 660 is certainly no slowpoke, it can be an appropriate first ATV for cautious, mature riders who respect the machine. Proper gear like helmet, gloves, and training classes are a must as well. Just use restraint until you get comfortable.
Conclusion
After reviewing all the specs, capabilities and real world experiences, we can conclude that the stock top speed of the Yamaha Raptor 660 is approximately 75 mph.
This velocity provides a thrilling kick in stock form yet still leaves room to grow with simple bolt-on modifications. With the right upgrades, top speeds over 90 mph are achievable if you so desire.
While the Raptor 660 may not have the radical 100+ mph potential of some bigger 700cc and 1000cc monsters, its balance of tractable power, nimble handling and stability make it one of the most well-rounded sport ATVs.
Yamaha struck a sweet spot with the Raptor 660, blending speed and fun in a package most ATV enthusiasts can actually utilize to its full potential. That’s why it remains popular even years after the end of production.
So get out to the dunes, trails and tracks on your Raptor 660 and discover the joy of controlled velocity for yourself. Ride within your limits, progress your skills over time, and respect the machine’s ample performance. The Raptor 660 is one of the best ways to experience the thrill of ATV speed!
