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EXHAUST

TIRES

TUBES /

TIREACC.

SPORTBIKEACC.

CRUISER /

TOURINGACC.

LUGGAGE /

SEATS

COVERS /

SECURITY

WINDSHIELDS

HANDLEBARS /

CONTROLS

LEVERS /

CABLES

FUELSYSTEMS

AIR FILTERS

OIL FILTERS

ELECTRICAL

LIGHTING /

GAUGES

BATTERIES /

CHARGERS

ENGINE

SUSPENSION /

FRAME

DRIVE

CHAIN

SPROCKETS

BRAKES

CHINESE

VEHICLEPARTS

CHEMICALS

GASCANS

TOOLS

TRANSPORT /

TRAILER

PROMOTIONAL

REFERENCE

INDEX

x

X X

X

X

717

BIG BORE KIT

for

HONDA GROM

Unleash all the power your Honda GROM can handle with

the Koso 170cc Big Bore kit.

CAMSHAFT KIT

for

HONDA GROM

• 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 - waiver available.

Description

WPS#

List

GROM big bore kit

27-5800 $344.95

REPLACEMENT PARTS

Piston/ring kit

27-5801 $99.95

Top end gasket kit

27-5802

29.95

Banjo bolt kit

27-5803

14.95

Description

WPS#

List

GROM camshaft

27-5804 $129.95

Kit includes:

• Ceramic coated aluminum cylinder

• 61mm bore, 11.5:1 compression ratio forged piston/ring

kit (premium fuel required)

• Top end gasket kit and banjo bolts

Not legal for use in California on pollution controlled

vehicles, race use only in California - waiver

available.

BIG BORE KIT

w

/

4-VALVE

CYLINDER HEAD

for

HONDA GROM

Description

WPS#

List

GROM 170cc big bore kit with 4-valve cylinder head

27-5810

$949.95

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 pollution controlled vehicles,

race use only in California - waiver available.

HIGH FLOW OIL PUMP FOR HONDA GROM

• Highly recommended for use with all engine upgrades

• Increases oil flow by 40%

• Helps prevent engine failure and lowers oil temperature

Description

WPS#

List

GROM High-Flow oil pump

27-5811

$47.95

See page 442 for Koso Grom fuel system parts

ENGINE