AUDIO / VIDEO / NAVIGATION EXHAUST BODY / FRAME LUGGAGE / SEATS COVERS / SECURITY WINDSHIELDS HANDLEBARS / CONTROLS LEVERS CABLES FOOTPEGS / FOOT CONTROLS INTAKE / FUEL SYSTEMS AIR FILTERS OIL FILTERS LIGHTING / GAUGES BATTERIES / CHARGERS ELECTRICAL SPARK PLUGS ENGINE CLUTCH / DRIVE SUSPENSION / BEARINGS CHAIN SPROCKETS BRAKES CHINESE VEHICLE PARTS STANDS TRANSPORT / RAMPS PROMOTIONAL REFERENCE INDEX x X X X X 729 BIG BORE KIT FOR HONDA GROM & MONKEY Unleash all the power your Honda GROM can handle with the Koso 170cc Big Bore kit. Description Years WPS# List Honda Grom/Monkey big bore kit `14-21 27-5800 $384.95 REPLACEMENT PARTS Piston/ring kit `14-21 27-5801 $110.95 Top end gasket kit `14-21 27-5802 $33.95 ADDITIONAL PARTS REQUIRED PER KOSO (ORDER SEPARATELY) Fuel tuner (Dobeck brand), fits all Grom and Monkey models* `14-21 811-0049 $236.95 Aftermarket exhaust system (see exhaust section of this catalog) RECOMMENDED PARTS High flow air filter, Grom `14-21 27-5809 $61.95 High flow air filter, Monkey `19-21 27-5818 $63.95 Air box tube (Grom only) `14-21 27-5807 $31.95 Intake tube (Grom only) `14-21 27-5808 $27.95 34mm Throttle body `14-21 27-5805 $139.95 Intake manifold for 34mm throttle body `14-21 27-5808 $27.95 High flow fuel injector `14-21 27-5812 $164.95 Fuel injector adapter kit `14-21 27-5813 $89.95 High flow oil pump `14-21 27-5811 $53.95 High output ignition coil `14-21 27-5819 $78.95 * Other brands of fuel tuner are also acceptable • 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 BIG BORE KIT W/4-VALVE CYLINDER HEAD FOR HONDA GROM & MONKEY Description Years WPS# List Honda Grom/Monkey 170cc big bore kit with 4-valve cylinder head `14-21 27-5810 $1039.95 ADDITIONAL PARTS REQUIRED PER KOSO (ORDER SEPARATELY) High flow air filter, Grom `14-21 27-5809 $61.95 High flow air filter, Monkey `19-21 27-5818 $63.95 Air box tube (Grom only) `14-21 27-5807 $31.95 Intake tube (Grom only) `14-21 27-5808 $27.95 34mm Throttle body `14-21 27-5805 $139.95 High flow fuel injector `14-21 27-5812 $164.95 Fuel injector adapter kit `14-21 27-5813 $89.95 High flow oil pump `14-21 27-5811 $53.95 Fuel tuner (Dobeck brand), fits all Grom and Monkey models* `14-21 811-0049 $236.95 Spark plug (NGK brand) `14-21 2-ER9EH $13.90 Aftermarket exhaust system (see exhaust section of this catalog) * Other brands of fuel tuner are also acceptable RECOMMENDED PARTS High output ignition coil `14-21 27-5819 $78.95 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. Kit includes: Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available. ENGINE
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