Yamaha TT-R 90
| Manufacturer | Yamaha |
|---|---|
| Also called | TT-R90 E, TT-R90, TT-R 90 E |
| Production | 2002 - 2007 |
| Class | Trial |
| Engine | single cylinder, four-stroke |
| Bore / Stroke | 47.0mm x 51.8mm |
| Compression ratio | 8.5:1 |
| Horse Power | 5.36 HP (4.0 KW) @ 7000RPM |
| Torque | 4.5 ft/lbs (6.1 Nm) @ 4000RPM |
| Ignition type | cdi |
| Battery | 8.5:1 |
| Transmission | Gear box: 3-speed Final Drive: chain |
| Suspension | Front: 26 mm telescopic fork Rear: single shock |
| Brakes | Front: expanding brake (drum brake) Rear: expanding brake (drum brake) |
| Front Tire | 2.50-14 |
| Rear Tire | 2/14-2 |
| Wheelbase | 40.91 inches (1039 mm) |
| Dimensions | L 60.0 inches (1524 mm) W 23.82 inches (605 mm) H 34.09 inches (866 mm) |
| Seat height | 24.61 inches (625 mm) |
| Weight | 138.89 pounds (63.0 Kg) (dry), 61.0 kg (wet) |
| Fuel capacity | 1.1 Gallon (4.16 Liters) |
| Manuals | Service Manual |
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The Yamaha TT-R 90 E was a single cylinder, four-stroke Trial motorcycle produced by Yamaha between 2002 and 2007. Max torque was 4.5 ft/lbs (6.1 Nm) @ 4000 RPM. Claimed horsepower was 5.36 HP (4.0 KW) @ 7000 RPM.
Engine
The engine was a air cooled single cylinder, four-stroke. A 47.0mm bore x 51.8mm stroke result in a displacement of just 89.0 cubic centimeters. Fuel was supplied via a single overhead cams (sohc).
Drive
The bike has a 3-speed transmission. Power was moderated via the wet, multiple-disc and centrifugal automatic.
Chassis
It came with a 2.50-14 front tire and a 2/14-2 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a 26 mm telescopic fork while the rear was equipped with a single shock. The TT-R 90 E was fitted with a 1.1 Gallon (4.16 Liters) fuel tank. The bike weighed just 138.89 pounds (63.0 Kg). The wheelbase was 40.91 inches (1039 mm) long.
2003 Yamaha TT-R90
The TT-R90 is the smallest member of the Yamaha 4-stroke family, sporting an air-cooled 89cc engine with smooth, predictable and non-intimidating power delivery. The bike retains the automatic clutch and the 3-speed transmission of the PW80 machine, since it looks like the young riders really enjoy the automatic clutch.
Built like a tank, just like other similar Yamaha machines, the 2002 TT-R90 can effortlessly cope with the beating kids put such bikes through.
2006 Yamaha TT-R90
A step up from the entry-level TT-R50, the 2005 TT-R90 adds to the power and torque figures, as well as to the fun factor. A bike for the young riders who have already gotten past their very first two-wheeled experience, the R90 still offers the automatic clutch 3-speed transmission and low seat which allows almost any rider to get a firm foothold on the ground for increased confidence.
Light and tough as nails, the 2005 Yamaha TT-R90 is a great dirt machine for continuing honing in the skills on young riders, boasting serrated pegs, racing-derived graphics and a paddle-style choke.
2007 Yamaha TT-R90
The 2007 MY TT-R90 is a great dirt machine for kids past the height of the 49cc entry-level bikes. Almost doubling the displacement of the smallest Yamaha dirt bike, the TT-R90 provides a non-intimidating feel, boosting the rider confidence while being a nifty platform for training and honing in the skills.
Air-cooled, 4-stroke, fun, and strong-pulling the 2007 MY TT-R90 comes with an easy-to-use semi-automatic 3-speed transmission which allows riders to focus on the track and care less about the secrets of the clutch work. built like a tank, this bike can take a lot of abuse and still work well in the backyard or on the track.