What category is the 2005 Yamaha TT-R 90?

The 2005 Yamaha TT-R 90 has a Category of Cross / motocross.

What is the engine size of the 2005 Yamaha TT-R 90?

The 2005 Yamaha TT-R 90 has a Capacity: of 89.00 ccm (5.43 cubic inches).

What type of engine does the 2005 Yamaha TT-R 90 have?

The 2005 Yamaha TT-R 90 has a Engine type of Single cylinder, four-stroke.

What is the engine power of the 2005 Yamaha TT-R 90?

The 2005 Yamaha TT-R 90 has a Power of 5.60.

What is the torque of the 2005 Yamaha TT-R 90?

The 2005 Yamaha TT-R 90 has a Torque of 6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 4000.

Is the 2005 Yamaha TT-R 90 air cooled or liquid cooled?

The 2005 Yamaha TT-R 90 has a Cooling system of Liquid.

How much does the 2005 Yamaha TT-R 90 weigh?

The 2005 Yamaha TT-R 90 has a Dry weight of 60.0 kg (132.3 pounds).

What is the seat height of the 2005 Yamaha TT-R 90?

The 2005 Yamaha TT-R 90 has a Seat height of 625 mm (24.6 inches) If adjustable, lowest setting..

Yamaha TT-R 90 - 2005 Specifications and Reviews

Name: 2005 Yamaha TT-R 90
Brand: Yamaha

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2005

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General information
Category	Cross / motocross
Model	Yamaha TT-R 90
Year	2005

Engine and Transmission Specifications
Cooling system	Liquid
Fuel control	SOHC
Bore x stroke	47.0 x 51.8 mm (1.9 x 2.0 inches)
Compression	8.5:1
Torque	6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 4000
Power	5.60
Engine type	Single cylinder, four-stroke
Capacity:	89.00 ccm (5.43 cubic inches)

Brakes, suspension, Frame and wheels
Rear brakes	Expanding brake
Front brakes	Expanding brake
Rear suspension travel	95 mm (3.7 inches)
Front suspension travel	110 mm (4.3 inches)
Physical measures and capacities
Wheelbase	1,040 mm (40.9 inches)
Ground clearance	157 mm (6.2 inches)
Overall width	605 mm (23.8 inches)
Overall length	1,525 mm (60.0 inches)
Overall height	865 mm (34.1 inches)
Seat height	625 mm (24.6 inches) If adjustable, lowest setting.
Power/weight ratio	0.0933 HP/kg
Dry weight	60.0 kg (132.3 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

5.5 hp

Peak Power

Best For

Track5%

City15%

Cornering20%

Daily Riding10%

Touring5%

Passenger0%

Rider Profile

Best For	This is a youth or beginner-oriented minibike, best suited to young or first-time riders learning basic off-road control rather than experienced adults.
Purpose	Designed as an entry-level trail bike for kids or small novice riders to practice light off-road riding in a safe, low-power package.
Rider Fit	Its very low seat height and light weight make it easy for smaller or younger riders to handle, but it is too small and underpowered for a full-sized adult.
Character	A gentle, forgiving, automatic-clutch trail bike that prioritizes simplicity and confidence-building over performance.
Not Ideal For	It is not suitable for adult daily commuting, highway travel, touring, or anyone seeking real speed or off-road performance capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2005 Yamaha TT-R 90 Rider Ergonomics Assessment

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Inseam (optional)

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Feet:

At 625mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2005 Yamaha TT-R 90, with a cramped knee angle of around 50 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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