NINJA 400
Lightweight 399cc twin on a steel trellis frame. Final US year 2023.
LIGHTWEIGHT SPORT 2023
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Metallic Carbon Gray
Power
44.8 HP
Torque
28 lb-ft
Engine
399cc P-TWIN
MSRP
$5,299
Trans
6-Speed
Seat
30.9 in
0–60 mph
4.1s
0–100 mph
—
¼ Mile
13.0s
01 · TAIL TIDY / FENDER ELIMINATOR
Major visual upgrade.
fender
TST Industries
Elite-1 High Mount Fender Eliminator
$35-100
Bolt-on high-mount plate holder; standard or Elite-1 kit with undertail closeout option.
fender
TST Industries
Elite-1 Low Mount Fender Eliminator
$100
Low-mount version that tucks the plate closer to the tire for a tighter tail.
fender
Evotech Performance
Ninja 400 Tail Tidy (2018+)
$115
CNC aluminium tail tidy using existing mount points; no cutting required.
fender
New Rage Cycles
Ninja 400 Fender Eliminator
$160
Plug-and-play kit with integrated LED turn signals and plate light on an alloy bracket.
fender
Yoshimura
Fender Eliminator Kit
$130-165
Laser-cut stainless bracket with LED lighting and anodized plate frame.
fender
Graves Motorsports
Graves Fender Eliminator Kit Kawasaki Ninja 400 / Z400 / Ninja 500 / SE / Z500 2018-2026 2018-2023 Ninja 400 / ABS
$159.95
Compact license-plate relocation kit that removes the bulky factory rear fender.
02 · INTEGRATED TAILLIGHT
Cleans up the rear by integrating turn signals into the brake light.
taillight
TST Industries
Programmable Sequential LED Integrated Tail Light
$142
Replaces stock tail and rear signals; 9 light modes, plug-and-play, smoked or clear.
taillight
TST Industries
Brake Light Modulator for Kawasaki OEM Tail Lights
$53
Adds a flashing brake-light pattern to the OEM Kawasaki tail light for visibility.
03 · EXHAUST
The biggest sound + weight + power upgrade.
exhaust
Yoshimura
Works Edition Street Alpha T Slip-On
$500-580
Stainless/carbon slip-on; roughly 3% peak HP gain over stock on the 399cc twin.
exhaust
Akrapovic
Carbon Slip-On Exhaust verify year
$560-620
Carbon muffler, ~2.4kg lighter than stock; pairs with optional stainless header.
exhaust
Two Brothers
S1R Black Series Slip-On
$570
S1R canister with black billet aluminum inlet; bolt-on to the OEM header.
exhaust
M4
X96 Carbon Slip-On Exhaust verify year
$400-450
X96 carbon canister slip-on; listing spans Ninja 400/500 and Z models.
exhaust
Graves Motorsports
Link Stainless / Carbon Full Exhaust System
$900-1000
Full stainless header with carbon canister; popular club-race full system.
exhaust
Arrow
Pro-Race Slip-On Exhaust 2018-2023 Ninja 400 / ABS
$468
Compact slip-on muffler that replaces the factory silencer while retaining original headers.
04 · WINGLETS / AERO
Aero / winglet options are typically focused on track-oriented superbikes.
winglet
Puig
Downforce Sport Side Spoilers
$249
Bolt-on side winglets for the Ninja 400 fairing; four color options.
05 · LED TURN SIGNALS (FRONT)
Stealth flush-mounts (TST) or premium small stalks (Rizoma Vision).
signal
TST Industries
Nexus LED Front Turn Signals
$116
Ninja 400-specific flushmount front LED signals replacing the stock stalks.
signal
TST Industries
Quadrix Universal Sequential LED Pod Signals
$63
Compact universal-fit sequential LED pods; needs LED relay or resistors.
signal
TST Industries
MECH-EVO Universal LED Pod Turn Signals
$65
Machined universal LED pod signals; front or rear mounting.
signal
New Rage Cycles
Rage360 Universal LED Turn Signals
$85-95
Universal 360-degree visibility LED signals, sold as a pair.
signal
Yoshimura
Universal LED Front Turn Signal Kit
$109
Universal-fit front LED signal kit with included hardware.
signal
LighTech
Sequential E8 LED Turn Signals Universal
~$68
Compact E8-homologated front LED indicators with bright sequential illumination.
06 · ECU TUNE
Unlocks meaningful power on ZX-4RR.
chip
TST Industries
WORX Stage 1 ECU Tune
$250
Mail-in ECU flash for stock or slip-on bikes; removes restrictions and rev limit.
chip
TST Industries
WORX Stage 2 ECU Tune
$250
Mail-in flash calibrated for full exhaust and intake modifications.
chip
TST Industries
WORX Stage 3 ECU Tune
$286
Race-spec flash for airbox, velocity stack and full-system builds.
chip
FTECU (Flash Tune)
Data-Link ECU Flashing Kit
$380
DIY flashing hardware and software to load and edit maps on your own ECU.
07 · MIRRORS
Rizoma Stealth is the premium pick across most sport bikes.
mirror
CRG
Arrow Billet Bar End Mirror verify year
$112
Universal 7/8 in bar-end mirror; needs internal bar adapter on the Ninja 400.
mirror
CRG
2 in Blindsight Bar End Mirror verify year
$49
Small round universal bar-end mirror, sold individually.
mirror
Rizoma
Cut-Edge Bar End Mirror verify year
$200
Billet universal bar-end mirror; requires a matching Rizoma bar adapter.
mirror
TST Industries
Mirror Block Off Plates
$39
Anodized plates that cover the fairing holes when stock mirrors are removed.
mirror
New Rage Cycles
Ninja 400 Mirror Eliminators
$30
Track-day mirror delete plates finished to match the fairing.
08 · AIR FILTER
K&N, DNA, and Sprint all make bike-specific filters.
filter
MWR
High-Efficiency Air Filter
$87
Washable race-grade cotton filter for the stock Ninja 400 airbox.
filter
TST Industries
WORX Airbox
$600
Replacement race airbox for the Ninja 400; needs a matching ECU tune.
filter
TST Industries
WORX Airbox Replacement Air Filter
$70
Service filter element for the TST WORX airbox.
filter
HiFloFiltro
OE Replacement Air Filter (EX400)
$13-20
Budget OEM-spec paper replacement filter for routine service.
filter
BMC
Performance Air Filter FM01010/04 2018-2023 Ninja 400 / ABS
$84.95
Washable performance air filter designed to replace the factory airbox element.
09 · FRAME SLIDERS / CRASH PROTECTION
Cheap insurance.
slider
Woodcraft
Street Frame Slider Kit
$105-130
Two-piece sliders mounting directly to engine mounts; drills fairing.
slider
Woodcraft
Race-Only Frame Sliders
$105-120
Shorter sliders sized for race bodywork; also axle sliders available.
slider
TST Industries
Frame Slider Crash Protection
$146
Frame-mount slider kit with delrin pucks and steel mounting hardware.
slider
Evotech Performance
Ninja 400 Crash Protection (2018+)
$230
Frame-mounted bobbins in nylon with aluminium hardware; UK-made.
slider
R&G Racing
Aero-Style Frame Sliders
$130
HDPE bobbins on de-embrittled bolts designed to bend rather than snap.
slider
Shogun
Protection Kit 2018-2023 Ninja 400 / ABS
$139.99
Model-specific crash-protection kit designed to reduce chassis contact during a slide.
10 · BRAKE & CLUTCH LEVERS
ASV, Pazzo, CRG, and Bonamici all make bike-specific kits.
lever
CRG
RC2 Brake Lever
$117
Folding, length- and reach-adjustable billet brake lever, direct fit.
lever
Vortex
V3 2.0 Brake and Clutch Levers
$86 each
Billet adjustable levers sold individually; brake and clutch versions.
lever
Womet-Tech
Evos Shorty Levers
$170
Shorty adjustable lever pair popular with Ninja 400 track riders.
lever
ASV Inventions
F3 Unbreakable Brake and Clutch Levers verify year
$209
Pivoting unbreakable lever pair; fitment spans Ninja 250R/300/400.
lever
Lightech
Brake and Clutch Lever Kit
$231
Italian billet lever set with adjusters; folding Alien version also offered.
11 · WINDSCREEN
Reduces buffeting.
screen
Zero Gravity
Double Bubble Windscreen
$108-120
Taller double-bubble profile for better wind protection; several tints.
screen
Zero Gravity
Corsa Windscreen
$108-120
Race-height screen giving a bigger tuck bubble for track use.
screen
Puig
Z Racing Windscreen
$111
Racing-profile acrylic screen in several tints, direct bolt-on.
screen
Hotbodies Racing
Ninja 400 Windscreen
$90
Budget replacement screen in clear or tinted, uses stock hardware.
screen
Ermax
Aeromax Windscreen verify year
$130
Taller touring-oriented screen with rolled top edge.
screen
MRA
Racing Windscreen R 2018-2023 Ninja 400
~$117
Race-profile windscreen shaped to reduce airflow around a tucked rider.
12 · REARSETS
Critical on a track-focused bike.
rearset
Woodcraft
Complete Rearset Kit
$475-510
Ninja 400-specific rearsets, 12 positions, best-in-class ground clearance.
rearset
Vortex
V3 2.0 Adjustable Rearsets
Billet rearsets with wide adjustment range; GP or standard shift.
rearset
Sato Racing
Ninja 400 Rear Sets
Japanese billet rearsets with high ground clearance and reversible shift.
rearset
Driven Racing
TT Rearsets
Lightweight adjustable rearsets with folding pegs and GP shift option.
rearset
TST Industries
WORX Adjustable Rearset Bracket
$170
Budget bracket that repositions the OEM pegs and controls for more clearance.
13 · PHONE MOUNT
Vibration dampener mandatory for iPhones on any sport bike.
phone
Quad Lock
Motorcycle Handlebar Mount
$50-100
Universal handlebar mount; pair with a case and vibration dampener.
phone
Quad Lock
Motorcycle Fork Stem Mount
$60
Mounts in the steering stem, keeping the phone centered and low.
phone
Quad Lock
Motorcycle Brake/Clutch Mount
$60
Clamps to the master cylinder perch; useful on clip-on bikes.
phone
CAYO
moto.dokk Smartphone Mount
$140
Mount with wireless charging and vibration damping for the phone camera.
phone
CAYO
bike.dokk Smartphone Mounting System
$30
Simple universal bar-mounted phone cradle system.
phone
Rokform
Pro Series Motorcycle Stem Mount Universal
$119.99
Fork-stem phone mount with a locking case interface and adjustable viewing angle.
14 · SEAT / GRIP
Track-focused bikes lean toward grip.
seat
TechSpec
Gripster Tank Grips
$88
Model-specific tank pads in Snake Skin or C3 for knee grip under braking.
seat
TechSpec
Gripster Tank Grip Extension Kit
$50
Adds grip area lower on the tank sides for aggressive body position.
seat
TechSpec
Gripster Spine Style Center Tank Protector
$25
Center pad protecting the tank spine from zippers and chest protectors.
seat
Armour Bodies
Pro Series Superbike Seat Base
$168
Fiberglass race seat base for the Ninja 400; foam and cover separate.
seat
TST Industries
WORX Quick Turn Throttle Tube
$40
Shorter-throw throttle tube reusing the stock grips and cables.
seat
Domino
MotoGP Grips Universal
~$28
Road-racing-style handlebar grips with a textured rubber surface for hand traction.
15 · RACE FAIRINGS / BODYWORK
For track-day riders.
body
Hotbodies Racing
Ninja 400 Race Bodywork
$800
Four-harness fiberglass race kit with Kevlar-reinforced mount areas.
body
Hotbodies Racing
Color Form Race Bodywork
$950
Same race kit with color molded into the resin, so no paint needed.
body
Armour Bodies
Pro Series Bodywork Kit
$1040
Full fiberglass race bodywork kit; Dzus fastener kit sold separately.
body
Norton Motorsports
GP Spec Race Bodywork
$750-950
Moto2-style narrow bodywork; uses a 07-12 CBR600RR screen and DBHolders stay.
body
Ninja400R
Race Bodywork Mount Kit
$70
Brackets and hardware to mount aftermarket race bodywork to the chassis.
Confirmed Spend $0 Lock or install products to track