V -Force Intake System delivers more peak
power and better throttle response
Exhaust:
New exhaust pipe delivers more midrange and
top-end power
Frame:
High-end chromoly frame features reduced wall
thickness and lower overall weight – total frame weight now
less than 9 kg (20 lbs.)
New forged swingarm support and footpegs
similar to 250 SX 2003 result is narrower, flatter profile and
reduced weight
Reinforced steering head area affords more
reliability
Swing arm:
Swing arm pivot increased 2 mm to 17 mm
diameter (stiffer and lighter weight)
10 mm longer in all 2004 models offers more
traction and more room for the rear wheel
Fork:
Newly adjusted WP 48 mm USD fork features
three bushings –fork is more supple and offers greater
sensitivity
Shock:
Improved sensitivity and increased bottoming
resistance through use of an optimal setting and a linear wound
main spring
Front Brakes:
All SX models have new brake discs with round
holes for weight reduction, less wear and reduced operating
temperature
Rear Brakes:
All models have the same foot brake-cylinder
(integrated reservoir) and the same brake calliper (26 mm) as 250
SX 2003
Wheels / Tires:
Excel Rims
Bridgestone M 59 and M 70 tires
Body Work:
One-piece rear fender / side panel
combination – same as last year’s 250 SX and 450 SX
– for all models
Lower sub-frame assures optimal
handling
All seats feature a new seat base, anchored
by a single mounting bolt located underneath the
seat
New larger airbox to accommodate one-piece
tail section
New air filter carrier with triple mounting
pins for more reliability
Instruments / Controls:
Renthal 608 tapered handlebar (12 mm higher
than last year)
Clutch master cylinder diameter reduced for
less force and better clutch control (2-Stroke: reduced from 10.5
to 9.5 mm and 4-Stroke: reduced from 9.5 to 9.0 mm)
Dual-component Renthal grips, grey/orange
(smoother and more resilient to damage)
Trim / Graphics:
New decals for spoiler and airbox cover -
seat color remains solid black