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MACHINE
SPECIFICATIONS
MODEL
DESIGNATION – HONDA RS250R
ENGINE
TYPE: 250cc – 2 STROKE - 75°
V TWIN
POWER OUTPUT: APPROX 85BHP
@ 13,100 RPM
TOP SPEED: APPROX 165MPH
CHASSIS: ALUMINIUM TWIN SPAR
REAR SWING ARM FROM JHA RACING
WHEELS: 3.5” X 17” FRONT –
5.5” X 17” REAR
SUSPENSION: INVERTED FRONT
FORKS
HONDA PROLINK REAR.
DRY WEIGHT:
APPROX 100KG. |
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Ram
Air:
The bike uses a pressurised air feed system. This consists
of a carbon fibre air-box under
the fuel tank, with a ram air scoop in the front fairing.
This forces cold air into the carburettors. Cold pressurised
air helps the engine produce more power at high speed. |
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Detonation
counter:
To get the maximum performance from the engine,
the det counter is used to aid carburettor setting. This is
linked to the data logger so the
bikes engine settings and performance can be checked after
each track session. This makes setting up the bike much quicker. |
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Wheel
speed sensor:
This sends information back to the data
logger system. This information is downloaded after
each session on track to help get the bike set up more quickly.
Rpm and corner exit speed can be compared, and then internal
gear ratios can be more finely tuned. |
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Performance
upgrades:
The bike uses a special
engine kit from JHA Racing. This
consists of special cylinders / ignition and exhausts. Power
is increased over the standard parts, but as with any power
gains, more maintenance
is required. |
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Special
Cylinders Heads:
Made by
Dave Cooper Racing. These two piece cylinder heads have
replaceable combustion chambers, so different specifications
of Volume, Squish clearance etc can be used to give the engine
different power delivery characteristics to suit each circuit.
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Revised rear suspension:
The rear suspension
features a special swingarm made by JHA racing in Japan. This
is lighter and stronger than the standard part, providing a
more stable ride. The standard rear shock is replaced by a
"WP" rear unit, which features multi adjustable compression
and rebound damping. |
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Datalogger
Screen:
This screen shows all the data the logger records. Engine
RPM, Throttle position, Speed, Detonations for each cylinder,
and the Voltage produced by the generator on the bike. With
this info the bike can be set up more quickly and accurately. |
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Detonation Map:
This screen is produced by the datalogger. It shows what
throttle position and RPM any detonations occur. With this
info carburetion settings can be made much more accurate.
Therefore the engine will produce more power throughout the
rev range. |
