Koso GROM 170cc BIG BORE & 4V HEAD KIT
Koso GROM 170cc BIG BORE & 4V HEAD KIT by Koso.
Discontinued product, for reference only. *Does not fit 2022+ models This complete top‑kit is the perfect add‑on for all horsepower enthusiast looking for performance ! It includes : a 170cc ceramic coated cylinder, forged piston, performance camshaft, bearing, rocker arms, 4 valve cylinder head, intake manifold, gaskets, and more. All parts are made from High‑quality components for reliability and durability that allow you to put your mind at ease and ride with confidence! WARNING THIS IS AN AFTERMARKET PART BUILT FOR RACING PURPOSES ONLY. KOSO IS NOT RESPONSIBLE FOR ANY DAMAGES CAUSED TO THE PARTS, VEHICLE, OR TO YOURSELF AND OTHERS. ENGINE PARTS ARE NOT UNDER WARRANTY NOR IS COLLATERAL DAMAGE OR COST OF LABOR, IN CASES OF MALFUNCTION. https://www.youtube.com/watch?v=pcVJlqdgays Specifications For more important tips, notes, list of parts and other modification required, see Honda GROM® FAQ page or download our Honda GROM® Caution PDF . Instructions Download PDF When using 170cc big bore kit and 4 valves head, customer must change or add the following parts: Parts Description Mandatory Suggested BA003214 Mini 3 - Air/Fuel ratio meter | Honda GROM X BA003245 Mini 3 - Cylinder head temperature | Honda GROM X DB008160 High flow injector | Honda GROM X DB623000 Injector adaptor kit | Honda GROM X DK623000 Hurricane racing air filter fits GROM only X DK633000 Hurricane racing air filter fits MONKEY only X DM623000 Connecting tube | fits GROM only X DM623K10 Intake tube | fits GROM only X DY623013 34mm Throttle body | Honda GROM X FA623002 Clutch kit (discs + springs) | Honda GROM X FA623K00 Enhanced lifter plate black | Honda GROM X KU623100 Ignition coil | GROM X NF623000 High flow oil pump | Honda GROM X MU623000 Chain tensioner | Honda GROM X NGK-ER9EHIX NGK Spark plug | Honda GROM X ECU Modification X Addition of a fuel control box X Proper exhaust system must be used to prevent re-flow pressure and heat X Other Instructions Download PDF When using 170cc big bore kit and 4 valves head, customer must change or add the following parts: * M = Mandatory | S= Suggested Parts Description BA003214 Mini 3 - Air/Fuel ratio meter | Honda GROM S BA003245 Mini 3 - Cylinder head temperature | Honda GROM S DB008160 High flow injector | Honda GROM M DB623000 Injector adaptor kit | Honda GROM M DK623000 Hurricane racing air filter fits GROM only M DK633000 Hurricane racing air filter fits MONKEY only M DM623000 Connecting tube | fits GROM only M DM623K10 Intake tube | fits GROM only M DY623013 34mm Throttle body | Honda GROM M FA623002 Clutch kit (discs + springs) | Honda GROM S FA623K00 Enhanced lifter plate black | Honda GROM S KU623100 Ignition coil | GROM S NF623000 High flow oil pump | Honda GROM M MU623000 Chain tensioner | Honda GROM S NGK-ER9EHIX NGK Spark plug | Honda GROM M ECU Modification M Addition of a fuel control box M Proper exhaust system must be used to prevent re-flow pressure and heat M Other