Yamaha 0 / Serow

Yamaha 0 / Serow
Manufacturer	Yamaha
Production	2010 - 11
Engine	Four stroke, single cylinder. SOHC, 2 valve
Compression ratio	9.5;1
Ignition	CDI
Transmission	5 Speed
Suspension	Front: 35mm Telescopic forks Rear: Monocross, Swingarm rebound-adjustable single shock
Brakes	Front: Single 245mm disc Rear: Single 203mm disc
Front Tire	80/70-21
Rear Tire	120/80-18
Wheelbase	1359 mm / 53.5 in
Seat Height	810 mm / 31.9 in
Weight	123 kg / 271 lbs (dry),
Recommended Oil	Yamalube 10w-40
Fuel Capacity	9.8 Liters / 2.6 US gal
Manuals	Service Manual

Engine

The engine was a Air cooled cooled Four stroke, single cylinder. SOHC, 2 valve. The engine featured a 9.5;1 compression ratio.

Drive

Power was moderated via the Wet, multiple discs, cable operated.

Chassis

It came with a 80/70-21 front tire and a 120/80-18 rear tire. Stopping was achieved via Single 245mm disc in the front and a Single 203mm disc in the rear. The front suspension was a 35mm Telescopic forks while the rear was equipped with a Monocross, Swingarm rebound-adjustable single shock. The 0 / Serow was fitted with a 9.8 Liters / 2.6 US gal fuel tank. The bike weighed just 123 kg / 271 lbs. The wheelbase was 1359 mm / 53.5 in long.

Photos

Overview

Yamaha XT 250 Serow

A reliable 4-stroke powerplant calls the shots on the all new XT250. But reliability isn't necessarily what you'll be thinking of when the pavement ends and your adventure really begins. Whether commuting around town or exploring the back country, the new XT250 is a fun loving dual sport. The Yamaha XT250 mission remains the same; to get you as far out of town and into nature as you want to go. The newest XT's bigger engine and extensive upgrades, take the XT to the next level of fun and all-around function. Where does your riding take you ? Commuting in city traffic, winding down a country road or hustling your way down a trail to nowhere? For those who can't decide, we have the perfect answer. The all new XT250 is designed for ultimate versatility at a great price. A new 4-stroke engine revs out predictable power, while a wide-ratio 5-speed transmission and class-leading low seat height gives you both performance and ease of use. Whether riding in the city or at the camp, let the new XT250 spice up your adventure. FEATURES: All new, 249cc, air-cooled, single over head cam (SOHC), 2-valve, 4-stroke single produces easy to use power great for daily commuting or exploring the back roads of our fine country. 4-stroke engine puts out strong, predictable torque across the entire RPM range for great on- and off-road fun. Convenient, no hassle push-button electric starting. New 2-valve cylinder head design features the cam chain on the right side. Straight design intake and exhaust ports provide excellent cylinder filling efficiency for strong low and mid range power. Single over head cam shaft is designed to provide good low and mid rpm torque. The conventional rocker arm design means fast, easy valve clearance adjustments. Ceramic composite cylinder wall plating on the lightweight aluminum cylinder helps dissipate heat more efficiently, reduces friction for improved performance, reduces weight, improves durability and increases cylinder service life. 74mm lightweight forged piston provides fast throttle response and excellent durability. Newly designed lightweight ball bearing mounted crankshaft provides solid low and mid range torque. Internal engine counterbalancer reduces engine vibration to maximize rider comfort. Multi plate wet type clutch with special "judder spring is utilized. Clutch lever pull is light and easy to use. Easy access paper type oil filter. Oil filter housing is located on the right hand side of the engine and is held in place with 3 Allen bolts for easy servicing. Maintenance-free CDI ignition produces a hot spark for fast, sure starts. New MV 33mm constant velocity carb provides crisp throttle response and great fuel economy. 2.8 litre airbox is located under the seat and utilizes an easy to access viscous (paper type) air filter. Wide-ratio, 5-speed transmission and manual clutch are well suited to the engine output for easy, relaxed riding. All new steel exhaust system with heat shields on both the header pipe and muffler protect both rider and passenger from accidental contact. Exhaust note is quiet and environmentally friendly. A US Forestry approved spark arrestor protects Mother Nature. Air Induction System (AIS) injects fresh oxygen at the exhaust port to insure complete combustion thereby reducing harmful hydro carbon and carbon monoxide (HC & CO) exhaust emissions. The XT250 easily meets the EPA emission standards. All new, semi-double cradle steel frame and an overall dry weight of only 123kg (270.6 lb), makes the XT250 one of the lightest, most compact dual purpose machines on the market. Rugged, box section steel swingarm fitted with easy-to-use eccentric chain adjusters 35mm KYB fork with 225mm (8.9") of wheel travel soaks up the rough stuff, both on-road and off. Rubber boots protect seals and tubes from dirt and grit damage. Lightweight aluminum lower triple clamp enhances suspension performance. Link Monocross rear suspension features an adjustable shock. Adjustments include spring preload. Rear wheel travel is 180mm (7.1") Low seat height of 810mm (31.9") creates a low centre of gravity for added manoeuvrability and inspires confidence by allowing most riders to put both feet firmly on the ground.

285mm (11.2") of Ground Clearance enhances terrain ability. New 245mm front disc brake with twin piston Nissin caliper. New 203mm rear disc brake is squeezed by a single piston Nissin caliper with rugged plastic caliper protector and an integrated (or 1 piece) rear master cylinder. New design, rugged steel 9.8 litre fuel tank means lots if miles and smiles between fill ups. 21" front and 18" rear lightweight DID alloy wheels are extremely durable and reduce unsprung weight for enhanced suspension performance. Long, YZ-style seat creates a balanced riding position and provides roomy comfort for both rider and passenger. The seat features a "gripper style" seat cover. Durable, plastic fenders keep mud and dirt off the rider when taking one's exploring off-road. Frame-mounted passenger footpegs provide two-up riding capability. Powerful, 60/55-watt, enduro-style, halogen headlight Small fairing reduces wind buffeting at highway speeds and provides added protection against weather and mud. All new digital instrumentation includes: speedometer, odometer, dual tripmeters, a clock as well as various warning lights. Serrated, folding steel footpegs Folding gear shift and rear brake lever Steering and helmet locks Locking fuel cap Convenient passenger hand rails Durable "O" ring chain Easy-to-use, frame-mounted choke knob Dependable, low-maintenance, sealed battery Flexible turn signals Easy-to-use, push-to-cancel turn signals Rubber boots on brake and clutch levers help reduce mud and dirt damage. On/off/reserve fuel petcock for peace of mind Rugged, plastic rear chain guide

Make Model	Yamaha XT 250 Serow
Year	2010 - 11
Engine Type	Four stroke, single cylinder. SOHC, 2 valve
Displacement	249 cc / 15.2 cu-in
Bore X Stroke	74.0 x 58.0mm
Cooling System	Air cooled
Compression	9.5;1
Lubrication	Wet sump
Induction	Teikei 33mm carburetor
Ignition	CDI
Starting	Electric
Max Power	18 hp / 13.1 kW @ 7500 rpm
Max Torque	19 Nm / 14.0 lb-fts @ 6500 rpm
Clutch	Wet, multiple discs, cable operated
Transmission	5 Speed
Final Drive	Chain
Front Suspension	35mm Telescopic forks
Front Wheel Travel	226 mm / 8.9 in
Rear Suspension	Monocross, Swingarm rebound-adjustable single shock
Rear Wheel Travel	180 mm / 7.1 in
Front Brakes	Single 245mm disc
Rear Brakes	Single 203mm disc
Front Tire	80/70-21
Rear Tire	120/80-18
Rake	26.0°
Dimensions	Length 2070 mm / 81.5 in Width 805 mm / 31.7 in Height 1160 mm / 45.7 in
Wheelbase	1359 mm / 53.5 in
Seat Height	810 mm / 31.9 in
Ground Clearance	285mm / 11.2 in
Dry Weight	123 kg / 271 lbs
Fuel Capacity	9.8 Liters / 2.6 US gal