Sohc Engine Valves

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Yamaha Raptor 250R was first introduced last 2008 after his closest cousin Yamaha Blaster died. It is not a surprised that the look of this ATV is just the same as the Yamaha Blaster except for its lighter weight. It has already has a low-end torque which provides easy reviving. It is also designed with a push buttoned start. Another feature is the wet sump system and ceramic composite plated cylinder that helps in dispersing heat and to make engine's life longer.

Yamaha Raptor 250r already has a five speed manual transmission which gives the ability to feather the clutch and excel out of the corners. Reverse gears were already excluded to give the ride a lighter weight. This is why the Yamaha Raptor 250r is easy to controlled and gripped by the rider giving them a perfect jump in any event.

Yamaha Raptor 250r has been a great sport quad. It won the Consumer Digest Best Buy Award in the Sport ATV category for 2008. This ATV has be a world class competitor of sport quad ATV manufacturers.

2009 Yamaha Raptor 250 Specs

Engine Type: 249cc air-/oil-cooled 4-stroke; SOHC, 2 valves

Bore x Stroke: 74 x 58 mm

Compression Ratio: 9.5:1

Fuel Delivery: Mikuni 29mm BSR

Ignition: DC-CDI

Transmission: 5-speed; wet multiplate clutch

Drive Train: 2WD; sealed O-ring chain, eccentric adjustment

Front Suspension: Independent double wishbone; 5-way preload-adjustable shocks, 7.5-in travel

Rear Suspension: Swingarm, preload-adjustable, 7.9-in travel

Front Brakes: Dual hydraulic disc

Rear Brake: Hydraulic disc

Front Tires: AT20 x 7-10 (Dunlop)

Rear Tires: AT19 x 10-9 (Dunlop)

Length/Width/Height: 64.0 x 42.1 x 40.9 in

Dry weight: 313 lbs

Wheelbase: 43.7 in

Seat Height: 28.7 in

Ground Clearance: 3.9 in

Fuel Capacity: 2.4 US gal.

Lighting: Dual 30W Krypton multireflector headlights & 21/5W brakelight

Colors: Team Yamaha Blue/White; White/Red

Yamaha Raptor 250r

Mercury Makes Some Changes to the 2010 Mountaineer

The Mercury Mountaineer, Mercury's version of the midsize Ford Explorer SUV, returns for 2010 with no engine changes.

Base and Premier models come standard with a 4.0-liter SOHC V6. This 12-valve engine is the latest iteration of Ford's long-lived Cologne V6, developed in the mid-sixties by Ford of Germany. Originally an all-iron pushrod engine, it was updated in 1997 with aluminum heads and overhead camshafts. A jackshaft in the block, located where the camshaft used to reside, drives each cam via a timing chain. This engine is shared with the Ford Explorer, as well as the Ford Ranger, Mazda B-Series, Land Rover LR3, and Ford Mustang. In the Mountaineer, it produces 210 horsepower and 254 lb-ft of torque.

Optional on Premier models is Ford's 4.6-liter modular V8. This SOHC engine, shared by the Explorer, Expedition, Mustang, and F-150 pickup, is also a very old design, dating back to 1991. Truck versions of this engine were updated in 2006 with three valves per cylinder and Ford's Variable Cam Timing system, but they still use a cast-iron block. In the Mountaineer, the 24-valve V8 makes 292 horsepower and 315 lb-ft of torque.

Critics find both engines more than adequate for the Mountaineer's weight, although even the V8 fails to match the muscle of newer rivals like the Nissan Armada. In daily commuting, the V8 does not feel dramatically stronger than the V6, although its extra torque gives it the edge for towing, and it is noticeably more refined. Both engines are well muffled, except at full throttle.

With nearly two and a half tons to haul, neither engine is thrifty. Surprisingly, EPA estimates suggest that the V8 is the more economical of the two, thanks mostly to its six-speed automatic; the V6's automatic has only five speeds. Both engines use regular fuel.

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What engines would make a good swap for my 2.0L 16 valve SOHC in my 2000 Dodge Neon?

look for a wrecked SRT-4 Neon and swap all the stuff out of that in to your neon and make a sleeper car. everything is a direct bolt on and swaping an engine already turbo charged saves you moeny in the longrun. as with a non turbo engine you will have to buy stronger rods and pistons and so on. seen many non turbo engines blow up as the engine couldnt take the turbo over time.

F-150 icon
It's an icon. And while it may not have the flash of something like the Mustang, the F-150 is absolutely critical for Ford Motor Company. It's been the best selling pickup truck in Canada for 42 years, and in the U.S. for the past 30.

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