2022 + Honda Grom 140cc Big Bore 4 Valve Head Kit

  
2022 2023 2024 Honda Grom 140cc Big Bore with 4 Valve head kit! No boring required to fit cylinder. Guaranteed to make the most power out of any 22+ big bore kit out! This is a brand new design featuring a all new 4 valve cylinder head. With this new head you will gain a lot of air flow into your engine and that makes power!

4 Valve heads are the way to go to get the most out of your small displacement engine. Pared with our 140cc 53mm cylinder and piston for easy installation and maximum reliability your bike will be a monster. Head can be installed with stock intake or koso 34mm intake.

Piston will come with rings installed and pre gapped ready for installation. Includes installation instruction for assembly but does not teach how to build the engine. Recommend to be built by a professional. You will need to tune/remap your ecu.

We recommend using a Aracer mini x for tuning. We can build it and tune it for you if you would want more information on how to have us build your engine please send us a message. 4 valve head with valves/springs/retainers assembled and ready for installation. Carbon fiber style valve cover with gasket and bolts. Custom 53mm 4 valve piston with rings/clips/pin.