Yamaha Motor Co., Ltd. (YMC) will release the 2001 model
of the production road racer "TZ250" developed with state-of-the-art
technologies fed back from YZR250 factory machine competing with such
success in the World GP. Featuring numerous detail improvements for
greater overall machine maturation, the 2001 TZ250 will be released on
Nov. 10, 2000.
The present 2000 model of the TZ250 mounted a
new-design engine and the new 2001 model, while retaining the main
outstanding characteristics of the existing model, has received an
infusion of the latest technological advances that primarily improve
acceleration performance and over-revving characteristics to achieve an
even higher level of competitiveness.
As for the "TZ125," the 2000
model will continue to be sold in its present specification.
2001 Model Yamaha Road Racer "TZ250"
Main New Features
1) Better performance with features like improved
carburetor, solenoid duty control function Changes in the diameter
of the main internal nozzle and other changes in the internal structure of
the TMXc38mm carburetor have helped to optimize atomization of the
air-fuel mixture, resulting in improved acceleration performance and more
linear throttle response. What's more, in addition to the ignition
system's CDI unit being given a new duty control function for the
carburetor solenoid, ignition timing has been optimized and the setting
adjustment process made easier while also improving over-rev
characteristics.
2) Revised crankcase In conjunction
with the above-mentioned changes in the carburetor settings, revisions in
the crankcase have been made to achieve a shape that is especially
outstanding from the standpoint of over-rev characteristics. Also,
optimizing the designs of the various parts of the crankcase assembly has
further improved reliability.
3) Revised compression-stroke
damping characteristics on front suspension A further maturation of
the front suspension has been achieved for the purpose of improving
dynamic stability during braking. In addition to extending the stroke 3mm,
the compression-stroke damping characteristics have been revised for
increased capacity.
4) Other specification changes Other
improvements include (1) new front brake master cylinder spec for improved
lever touch and operability, (2) new spec for the damper attachment
assembly on the rear wheel clutch hub for improved reliability and (3)
improved response in the digital meters (thermometer).
2001 model Yamaha Road
Racer"TZ250" Technical Specification
Overall length x width x height Wheel travel
(front / rear) Seat height Wheelbase Minimum ground
clearance Dry weight |
1,955 x 650 x 1,083 mm 113 x 118
mm 788 mm 1,342 mm 112 mm 102 kg |
Engine type Cylinder
arrangement Displacement Bore x stroke Compression
ratio Maximum power Maximum torque Starting
system Lubrication Fuel tank
capacity Carburetion Ignition system |
Liquid Cooled 2-Stroke Crankcase Reed
Valve V-twin 249 cc 54.0 x 54.5 mm 7.2 ~ 7.7:1 68kW
(92PS) / 12,250 rpm 53Nm (5.4kgf-m) / 11,750 rpm Push start
Pre-mix 23.0 liter TMX 38 x 2 C.D.I |
Primary / Secondary reduction ratios Clutch
type Transmission type Gear ratios
Frame type Caster
/ Trail Tire size (front / rear) Brake disc diameter (front /
rear) Shock absorber (front / rear)
Brake type (front /
rear) Suspension type (front / rear) |
2.524 / 2.571 Dry multi-plate coil
spring Constant Mesh 6-speed 1st: 1.889, 2nd: 1.476, 3rd:
1.261 4th: 1.080, 5th: 0.963, 6th: 0.909 Diamond 22 degrees
/ 82 mm 3.10/4.80 R17 / 165/55 R17 298 mm / 185 mm Oil
damper, air-combined coil spring Gas filled oil damper, coil
spring Hydraulic double disc / Hydraulic single
disc Telescopic / Swingarm |
|