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MX-PERFORMANCE.COM Products Are For Closed Course Competition Use Only. Not Intended for Street Use
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Unleash all the power your Honda GROM can handle with the Koso 170cc Big Bore kit.  SALE!!! FREE SHIPPING P# 27-5800 LIST:$344.95 MXP:$305.00 GROM big bore kit Kit includes: • Ceramic coated
aluminum cylinder • 61mm bore, 11.5:1 compression
ratio forged piston/ring kit • Top end gasket kit and banjo bolts (premium fuel required) Not legal for use in California on pollution controlled vehicles, race use only in California |
BIG BORE KIT w/4-VALVE RACE CYLINDER HEAD for HONDA GROM
 if you want your GROM to
"scream " this is the kit for you ! P#27-5810
LIST:$949.95 MXP:$855.00 SALE
!!! GET ONE WHILE THEY LAST, $799.00 GROM 170cc big bore kit with 4-valve Race cylinder
head
Kit Includes: • Koso ceramic coated
big bore cylinder kit forged w/4-valve piston and gaskets •
Koso 4-valve cylinder head (complete with camshaft, rocker arms, intake manifold, and all
other parts shown in the picture) • NOT LEGAL FOR USE IN CALIFORNIA
ON POLUTION CONTROLLEDVEHICLES, RACE USE ONLY IN CALIFORNIA. WAIVER AVAILABLE. |
 The Koso 4V Cylinder Head kit for Honda GROM® is the ideal engine part to complete the Koso Honda GROM® Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This new designed head is the perfect addition for those who desire more power and torque. The 4 Valve Cylinder Head Kit features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves. Feel the speed! *Fit only Koso Big Bore kit. |
 P#27-5801 MXP:$95.95 61MM Piston/ring kit KOSO PISTON/RING
KIT REPLACEMENT PART
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 P# 27-5804 LIST:$129.95
MXP:$117.00 HONDA GROM PERFORMANCE CAMSHAFT • The Koso 240° camshaft increases power and torque compared to the stock camshaft. • Can be used with a stock engine, or for optimal gains, use with the Koso 170cc Big Bore Kit. Not
legal for use in California on pollution controlled vehicles,
race use only in California |
 P# 27-5811 LIST:$47.95
MXP:$44.00 High-flow oil pump for Honda GROM® is strongly recommended for those who upgraded their engine with our
170cc Big Bore kit and 4v Cylinder head. The addition of this high
quality part will increase the oil flow by 40%; which is a
very effective modification that will help prevent engine failure. Keeping the engine lubricated and cool is very important; whether you ride for fun or for races. KOSO GROM HI-FLO OIL PUMP!!!
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 HONDA
GROM P#TBW9150 MXP:$259.00 FREE SHPPING!!! 186cc 64mm Bore Kit – Includes Ceramic coated all aluminum cylinder, piston kit, and gasket kit.
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 P#TBW9153 MXP:$149.00 FREE SHPPING!!! HONDA GROM Oil Cooler Kit Requires use of above cylinder or similar one with oil in/out outlets
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 HONDA
GROM P#TBW9154 MXP:$389.00 FREE SHPPING!!! 186cc 64mm Bore Kit and Oil Cooler Kit – Same kit as above but with an oil cooler kit included
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 HONDA GROM P#TBW1032 MXP:$69.00 FREE SHPPING!!! 64mm Piston Kit
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 HONDA GROM P#TBW1027 MXP:$16.00 FREE SHPPING!!! 64mm Head Gasket Kit
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 HONDA
GROM P#TBW1041 MXP:$164.00 FREE SHPPING!!! 64mm Ceramic All Aluminum Cylinder.
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 P# 27-5805 LIST:$157.95 MXP:$148.00 THROTTLE
BODY • 34mm Throttle body for increased performance compared to stock 30.5mm throttle body • Includes all gaskets needed and instructions |
PERFORMANCE
INTAKE PARTS FOR HONDA GROM |
 P# 27-5806 LIST:$79.95 INTAKE MANIFOLD •
Intake manifold port is larger than stock and is size matched
to use with the Koso throttle body • Includes all
gaskets needed and instructions |
 P#27-5807 $34.95 AIRBOX
TUBES • Connecting tube
is designed to connect the stock Grom
airbox to the Koso 34mm throttle body • Intake tube allows for higher air volume to enter the stock Grom airbox
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 P#27-5809 LIST:$68.95 HURRICANE AIR FILTER • Increases airflow and offers improved filtering compared to the stock air filter • Removable foam filter media can be cleaned repeatedly • Replaces the stock Grom air filter |
 P# 27-5808 $31.95 AIRBOX
TUBES • Connecting tube
is designed to connect the stock Grom
airbox to the Koso 34mm throttle body • Intake tube allows for higher air volume to enter the stock Grom airbox
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 Supplied with application specific
harness for easy Plug and Play installation – no
cutting into OEM wires • Pre-programmed with 2 maps,
one for stock and one for a slipon exhaust • Comes with easy to use software and USB cable making tuning a snap •
Runs up to 8 injectors independently • TPS Calibration,
to account for slight variations between bikes •
Self mapping capability with purchase of optional Z-AFM Kit •
Optional handlebar mounted MAP switch available separately P#
277-A868 Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available |
 P# 131-11001 MSX 125 GROM ‘14-15
LIST:$399.95 Maximizes power and fuel economy • Plug and play installation •
On the fly tuning, no dyno required • Works with
all ECU downloads and all brands of aftermarket ECU controllers • Does not interfere with stock ECU operation • Includes air/fuel ratio gauge (2 1/8” diameter), wideband controller and Bosch O2 sensor (gauge mount and O2 sensor bung not included 1 Year warranty, will not void any OEM factory warranties The AFR+ brings together two technologies
within one system to make it the most powerful, user-friendly
tuning device on the market. AFR+ combines an EFI controller
with a wideband O2 sensor and AFR gauge to provide a user
instant fuel trimming ability and feedback about their
vehicle’s state of tune. The AFR+ can handle all
of your fueling needs or compliment ECU downloads and already installed
EFI controllers. The AFR gauge allows you to know exactly how well your tune-up is performing. The EFI fueling allows
you to control any necessary fine tuning without spending more
money or valuable time. Metric Only Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available |
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BACK ORDERP#374802 LIST:599.99 MXP:$550.00Honda Grom (2014) 143cc Big Bore KitBolt on 50% more power! Take your GROM from Stock 8HP to over 12HP with this easy to install bolt on 143cc Big Bore kit. This complete kit comes with everything you need for an easy installation. Takegawa kits come direct to us from Japan are designed to bolt on easily and everything you need is in 1 box:
MX-PERFORMANCE.COM Products Are For Closed Course Competition Use Only. Not Intended for Street Use. |
P#0114121 LIST:$276.00 MXP:$260.00 Honda GROM (2014) - Power Commander Ignition Quick ShifterThis unit allows any single cylinder vehicle to have quick shifter functionality without the need for a Power Commander. It comes with “coil cap” style connector (Denso) for easy installation on most late model applications. For applications that do not have this style of coil the connector can be removed and the unit hard wired in. Long travel sensor designed to keep unit away from riders boot and from the bikes chain. Sensor is fully waterproof and immune to temperature. Optional remote quickset adjuster allows you to adjust kill
times on the fly |
P#01116049 LIST:$399.99 MXP:$375.00Honda GROM PCV (2014) - Power Commander V Fuel Injection ModuleUsing valuable data collected from the Power Commander III, Dynojet introduces the Power Commander V, the premier tuning system. Retaining the famed user-friendly interface, the smaller and capable Commander V not only tunes the electronic fuel injection (EFI), but also the ignition timing. These features provide Harley-Davidson Dyna riders with unparalleled access to performance-enhancing possibilities for your cruiser. From simple corrections for off-idle hiccups to extensive race level mods. Dynojet Power Commander V is exactly what H-D riders need to unlock the potential of their Big Twin Harley engine.
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P# 12-8344BK VooDoo GROM EXHAUST BLACK
FREE SHIPPING!!!
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VooDoo Grom Exhaust !!!
Designed and produced by VooDoo Industries for the demanding motorcycling enthusiast! •
Mandrel bent stainless steel for a perfect fit • Mufflers are finished in either show polish or black with
a laser etched VooDoo logo • All mufflers include a rebuildable perforated stainless steel baffle core and all clamps/brackets
needed for installation ←
← ←
← P# 12-8344BK VooDoo GROM EXHAUST BLACK LIST:$359.99 MXP:$324.00 FREE SHIPPING!!!
— — — — — — — — —
— — — —
→ →
→ → P# 12-8344P VooDoo GROM EXHAUST Polished LIST:$359.99 MXP:$324.00 FREE
SHIPPING!!!
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P# 12-8344BK VooDoo GROM EXHAUST POLISHED
FREE SHIPPING!!!  |
Grom 125 PRO CIRCUIT T-6 System w/carbon cap
P#794-0618 LIST:$389.95 MXP:$350.00
Some offroad
models may contain emission control devices. Some aftermarket parts may remove these devices. Removal or modification of such
devices is illegal in the State
of California unless used exclusively for closed course competition use ONLY, never to be used on public lands or highways.
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623507-16-1013 LIST:$289.99 MXP:$260.00 FREE SHIPPING EVO S Full System - Honda Grom (14-16) The Big Gun EVO Street Series was designed to deliver maximum horsepower & torque gains throughout the RPM range. Made from .049 stainless steel tubing & an aluminum muffler canister the EVO “S” exhaust system is much lighter than stock units. Our sleek muffler design allows for maximum clearance and ease of installation. The muffler is coated black and wrapped in our high temp EVO “S” decal then coupled with our aggressive black end tip to give it that signature Big Gun look. All Big Gun exhausts are for closed course use only and are not intended for use on the road. Big Gun exhausts are NOT LEGAL for sale or use on pollution controlled vehicles in the state of California. |
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FREE SHIPPING!!! Yoshimura P#196657 LIST:$530.95 MXP:$ Please call for price... HONDA GROM RS-9 Stainless/Carbon Full System RS-9
Parallelogram-shaped muffler Increased muffler volume over stock system, resulting in better
throttle response and improved noise cancellation Light-weight muffler construction with
carbon fiber end-cap CNC machined muffler bracket Reduced
weight over OEM system Stainless steel header and tail-pipe |
TWO BROTHERS RACING P# 005-3740105-S1 LIST:$529.98 MXP:$440.00 FREE SHIPPING!!! Honda GROM (2014) S1R Full System – Carbon Fiber Description: |
FREE SHIPPING!!! Yoshimura P#196658 LIST:$395.95 MXP:$ Please call for price... HONDA GROM RS-9 Stainless / Aluminum Full System RS-9 Parallelogram-shaped muffler Increased muffler volume
over stock system, resulting in better throttle response and improved noise cancellation Light-weight muffler construction with carbon fiber end-cap CNC
machined muffler bracket Reduced weight over OEM system Stainless steel header and tail-pipe |
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Yoshimura P#196670 LIST485.95 MXP:$ Please call for price... FREE SHIPPING!!! HONDA GROM RS-9 Stainless/Carbon Slip-On - EPA Noise EPA Noise Compliant RS-9
Parallelogram-shaped muffler Increased
muffler volume over stock system, resulting in better throttle response and improved noise cancellation Light-weight muffler construction with carbon fiber end-cap CNC machined muffler bracket Reduced weight over OEM system Stainless steel tail-pipe |
P#010-6-51B MXP:$58.95 The Seven Eighths "SE" handlebars are a high quality replacement for riders that still prefer the crossbar feel. The SE bars are available in bends to suit every size
bike and style of riding. |
Yoshimura P# 196671 LIST:$349.95 MXP:$ Please call for price... FREE SHIPPING!!! HONDA GROM RS-9 Stainless/Aluminum Slip-On - EPA EPA Noise Compliant RS-9 Parallelogram-shaped muffler Increased muffler volume over stock system, resulting in better
throttle response and improved noise cancellation Light-weight muffler construction with carbon fiber end-cap CNC machined muffler bracket Reduced weight over OEM system Stainless
steel tail-pipe |
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93-0051 LIST:$99.95 MXP:$89.95 GROM BILLET FOOT PEGS BLACK |
Fender Eliminator Kit
LIST:$149.95 MXP:$119.00 Yoshimura has always been synonymous with quality craftsmanship, precision fitment, and impeccable quality. Our Fender Eliminator Kits are no exception, and they are sure to give your bike the sleek race look that every rider craves. These kits feature a precision laser cut stainless bracket that tucks discreetly under the tail section of the bike, as well as a premium CNC machined light holder which houses 4 LED lights. The light housing is anodized black and laser etched with Yoshimura's logo. Completing the kit is an anodized aluminum license plate frame which features a silk screened Yoshimura logo. This kit features two, turn-signal mounting locations, depending if you are running a Yoshimura Full System, Slip-On, or the Factory exhaust. |
P# 93-0050 LIST:$99.95 MXP:$89.00 Honda GROM (2014) Fender Eliminator Kit Description: |
 CAT5 SERIES • Anodized FIRST then CNC machined from 7075 aluminum • You end up with a trick colored sprocket with silver highlights • Unique tooth design • Trusted by champions
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 CAT5 SERIES • Anodized FIRST then CNC machined from 7075 aluminum • You end up with a trick colored sprocket with silver highlights • Unique tooth design • Trusted by champions
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 CAT5 SERIES • Anodized FIRST then CNC machined from 7075 aluminum • You end up with a trick colored sprocket with silver highlights • Unique tooth design • Trusted by champions
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P# 023101 MXP:$34.95 PRO TAPER® 420MX CHAIN 134L • Premium gold series chain • Designed for 50cc to 125cc applications • Lightweight, ultra high strength chromoly construction with a 5000 lb. tensile strength |
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 P#27-5786R Red LIST:$47.95
MXP:$44.00 THE HONDA GROM E./F./G.
TOP CLAMP GAUGE BRACKET FOR THE HONDA GROM Allows for a quick and easy installation of the Koso Honda Grom cylinder head temp., air/fuel ratio gauges or
any of the Koso Mini 3 gauges.
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 P#27-5786S Silver LIST:$47.95
MXP:$44.00 THE HONDA GROM E./F./G.
TOP CLAMP GAUGE BRACKET FOR THE HONDA GROM Allows for a quick and easy installation of the Koso Honda Grom cylinder head temp., air/fuel ratio gauges or
any of the Koso Mini 3 gauges.
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 P#27-5786BK Black LIST:$47.95
MXP:$44.00 THE HONDA GROM E./F./G. TOP CLAMP GAUGE BRACKET FOR THE HONDA GROM Allows for a quick
and easy installation of the Koso Honda Grom cylinder head temp., air/fuel ratio gauges or any of the Koso Mini 3 gauges.
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 P# 27-5785 Air/Fuel ratio LIST:$104.95
MXP:$96.00 Plugs into the OEM oxygen sensor • A/F ratio display range: 12.2:1~17.2:1, display unit: 0.1 • 12 Volts DC •
Dimensions: 60 mm x 30 mm x 11.5 mm •
Top clamp or Mini 3 universal gauge mount sold separately |
 P# 27-5747M Silver LIST:$14.95 UNIVERSAL MINI 3 GAUGE MOUNT
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 P# 27-5784 Cylinder head temp.
gauge LIST:$99.95 MXP:$94.00 CYLINDER HEAD TEMPERATURE GAUGE • Shows temperature in either °F or °C • Temperature range -4° ~ +428° F in 0.1° increments • 12 Volts DC • Dimensions:
60 mm x 30 mm x 11.5 mm • Peak temperature recall
function •
Top clamp or Mini 3 universal gauge mount sold separately |
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