2002 Yamaha TTR90 Off-Road Model

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4Strokes
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2002 Yamaha TTR90 Off-Road Model

Postby 4Strokes » Thu Mar 16, 2017 10:22 am

02ttr90.jpg
2002 Yamaha TT-R90 Off-Road Model
When Yamaha introduced the YZ400F in 1998, it revolutionized the four-stroke motorcycle market. This model did more to revitalize and modernize the image of the four-stroke than any other motorcycle in recent memory. Yamaha continued on that path of excellence when it introduced the TT-R90 in 2000. Today, with the YZ426F, WR426F, YZ250F, WR250F and TT-R line-up, Yamaha is firmly established as the leader in four-stroke technology on the track, in the woods and through the desert.

A four-stroke SOHC 89cc air-cooled engine powers the TT-R90. This compact and reliable powerplant has been specially developed for the TT-R90 and is equipped with a lightweight crank and compact CDI rotor that ensures instant throttle response and spirited acceleration. A Mikuni VM16SH carburetor delivers a precisely metered fuel flow to the low-emission engine for a smooth, easy ride.

The TT-R90 features a three-speed, semi-automatic transmission that allows riders to develop shifting (i.e. riders graduating from the fully automatic PW50) and mastering the throttle without use a clutch. Once they’ve become comfortable with throttle control and shifting, they can transition to larger, fully manual, kids’ bikes where mastering the clutch will be their only focus.

The TT-R90 chassis is based on the highly successful PW80 design, while Yamaha’s championship YZ line inspired its radical new bodywork. Its tubular twin-spar construction creates a rigid chassis, and this design also offers easy access to the engine for routine maintenance. For added engine protection, the 2002 TT-R90 is fitted with a tough steel engine guard. A grab handle behind the seat makes for simple loading into a van or trailer.

Long travel front forks give a generous 4.3 inches of smooth-action wheel travel for a soft ride; while the lightweight Monocross rear suspension features a Bilstein-type shock absorber operated by a square-section swinging arm and offers 3.7 inches of travel. Equipped with a 14-inch front wheel, 12-inch rear wheel and low 24.5 inches racing-type seat, the TT-R90 suits most younger/smaller riders.

A lightweight, plastic fuel tank with air scoops, YZ-type front and rear fenders, side panels, front number plate and bright racing-inspired graphics make the TT-R90 one of the most impressive play bikes today.

The 2002 TT-R90 is available in Team Yamaha Blue/White at dealerships nationwide in July 2001. The manufacturer’s suggested retail price is $1,699.

Engine Specifications
Type: 89cc, Air-cooled, SOHC, four-stroke
Bore & Stroke: 47 x 51.8mm
Compression ratio: 8.5:1
Carburetor: Mikuni 16mm

Transmission Specifications
Type: 3-speed with automatic clutch

Chassis Specifications
Front suspension: Telescopic, 4.3" of travel
Rear suspension: Single shock, 3.7" of travel
Front brake: Drum
Rear brake: Drum
Front tire size: 2.50-14
Rear tire size: 3.00-12

Capacities
Fuel tank: 1.1 gallons

Dimension and Dry Mass
Overall length: 60"
Overall width: 23.8"
Overall height: 34.1"
Wheelbase: 40.9"
Ground clearance: 6.3"
Seat height: 24.6"
Dry mass: 132 lbs.

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