AUDIO / VIDEO / NAVIGATION EXHAUST BODY / FRAME MINIBIKE 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 STANDS TRANSPORT / RAMPS PROMOTIONAL INDEX X X X X 156 170CC BIG BORE KIT WITH 4 VALVE CYLINDER HEAD HONDA GROM and MONKEY Description Years WPS# List Honda Grom/Monkey 170cc big bore kit with 4-valve cylinder head `14-21 27-5810 $1343.92 ADDITIONAL PARTS REQUIRED PER KOSO (ORDER SEPARATELY) High flow air filter, Grom `14-21 27-5809 $74.34 High flow air filter, Monkey `19-21 27-5818 $76.74 Air box tube `14-21 27-5807 $47.92 Intake tube `14-21 27-5808 $43.12 34mm Throttle body `14-21 27-5805 $167.94 High flow fuel injector `14-21 27-5812 $228.38 Fuel injector adapter kit `14-21 27-5813 $124.53 High flow oil pump `14-21 27-5811 $53.95 Spark plug (NGK brand) `14-21 2-ER9EH $19.22 Aftermarket exhaust system (see exhaust section of this catalog) Any fuel tuner is acceptable 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) • Additional parts required for proper operation, see table below. Not legal for use in California on pollution controlled vehicles, race use only in California - waiver available. ***ECU Modification is mandatory to use this kit*** 150CC BIG BORE KIT - HONDA GROM • Includes a ceramic coated cylinder, 61mm forged piston, rings, pin, pin clips, gasket kit, and banjo bolts • Compression ratio of 11.5 to 1 allows the use of premium pump gas to keep the reliability of the stock motor Description Application Year WPS# List 150CC Big Bore Kit Honda Grom `22-25 27-5937 $555.61 RECOMMEND PARTS Connecting tube Honda Grom `22-25 27-5929 $50.32 Throttle body 28mm Honda Grom `22-25 27-5931 $191.92 Intake manifold 23mm-29mm Honda Grom `22-25 27-5932 $95.92 High fllow oil pump Honda Grom `22-25 27-5934 $80.36 27-5937 27-5929 27-5931 27-5932 27-5934 MINIBIKE
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