As the throttle body and intake manifold are used to control the amount of air flowing to the engine’s combustion chamber, they are important elements of the admission system. Using our Koso 34 mm throttle body in conjunction with our 30.5 to 34mm intake manifold will allow better air/fuel mixtures for a quicker throttle response.

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.

As the throttle body and intake manifold are used to control the amount of air flowing to the engine’s combustion chamber, they are important elements of the admission system. Using our Koso’s 34 mm throttle body in conjunction with our 30.5 to 34mm intake manifold will allow a better air/fuel mixtures for a quicker throttle response.

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.

The Oil Cooler Kit is a high quality accessory designed to help the Honda horizontal engine keep cooler.  Air-cooled engines run hotter when modified (i.e. big bore kits) and/or subjected to heavy loads such as racing use.  This kit will help the engine’s durability and reliability by circulating the engine oil through a cooler reducing the engine’s oil temperature. The kit includes the following:

– Lightweight aluminum 4 row oil cooler (not a 3 row as many others sell).
– AN fittings
– Crimped, braided lines

– No hose clamps that could easily come off or leak nor cheap rubber hoses.
– Mounting Bracket and Hardware

This oil cooler must be used with our big bore kit or one that has similar cylinder fittings (Kitaco and possibly others).

Have a big bore engine? Well this is perfect for you guys with an upgraded motor.  This will help secure that new engine place and helps reduce vibration. Not only is it functional but looks great as well. 

Need to monitor your engine temperature? Our Mini 3 Cylinder Head Temperature meter is designed especially for Honda GROM® which is the perfect addition for you. Its peak recall function will allow you to see the maximum temperature reach.

Temperature & Max. temp record

Display range:

t-1- -20~200°C (-4~392°F)

t-2- -40~185°C (-40~365°F)

t-3- -20~220°C (-4~428°F)

t-4- -20~200°C (-4~392°F)

t-5- -20~120°C (-4~248°F)

Display unit 0.1°C (°F)

Temperature type Display unit: t-1~t-5

Effective voltage DC 12V

Meter standard JIS D 0203 S2

Meter size (W X L X H)60 x 30 x 11.5mm

Meter weight ±22g

Your need for speed pushed you to install our 170cc Big Bore kit and 4 Valve Head kit? Unleash the full power of that kit by using  our High‑flow Injector. A small upgrade for better performance!!

This product is legal for closed-course competition use only; for racing vehicles (a competition vehicle not used on public highways). Intended for off-road use or race purposes; may not meet regulations of pollution controlled roads or highways. Not legal for vehicles registered and use in California.

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.

Made from resistant high quality material, our Koso chain tensioner could save your engine from expensive damage. We came up with this long lasting solution to replace the OEM chain tensioner which has a tendency to wear prematurely.

* The arm is made by Aluminum 6061, and the wheel is made by JIS SCM415 (=SAE 4115) Alloy Structure Steel (Chromium Molybdenum Steel).

* Works on stock engine and highly recommended to use with our Big Bore & 4V Head kit.

* Fits 2014 to 2017 engines.

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.

Our Koso High-flow oil pump for Honda GROM® is strongly recommended for those who upgraded their engine with our 170cc Big Bore kit and 4v Cylinder head. The addition of this high quality part will increase the oil flow by 40%; which is a very effective modification that will help prevent engine failure. Keeping the engine lubricated and cool is very important; whether you ride for fun or for races.

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.