SPECIAL PARTS TAKEGAWA Released Super Head 4V + R Bore-up Kit 181cc (Silver) for GROM / MSX125 / MONKEY 125.

SP TAKEGAWA, a specialist in parts for 4-mini motorcycles, has released the "Super Head 4V + R Bore-up Kit 181cc" (Silver) for HONDA GROM, MSX125 and MONKEY 125.

Product Summary

Price: Around 1,090 USD
Compatible models: GROM, MSX125, MONKEY 125, GROM (JC61-1000001 - 1299999), GROM (JC61 - 1300001), GROM (JC75 - 1000001), MSX125SF, MSX125, MONKEY 125 (JB02 - 1000001)

It is necessary to install FI Controller 2 (Injection Controller) at the same time to adjust the fuel suitable for engine parts.

Part Number: 01-05-0173

Product details

■ Super Head 4V + R Bore-up Kit 181cc

By using two intake / exhaust valves each, the area of ​​the valve curtain was expanded and achieved high intake / exhaust efficiency. The original head shape is designed by changing the center valve to 4 valves and balancing between the valve angle, the combustion chamber shape, and the port shape produces high output that cannot be obtained with a normal head.
The combustion chamber is finished with high precision by NC processing.

・SOHC highest peak class intake and exhaust efficiency
Valve diameter IN: 25mm x 2 / EX: 21.5mm x 2
Valve stem shaft diameter: 4.5mm in both IN and EX

By adopting the unequal pitch valve spring, it prevents surging at high rotation. The surface of the cylinder head is painted black. The inspection breather cover is included, so you can release the internal pressure of the engine by purchasing a separate oil catch fuel tank kit. The inspection breather cover, inspection cover, and L. cylinder head side cover adopted aluminum die-cast barrel polishing.

・Aluminum forged roller rocker arm
The frictional resistance with the camshaft is reduced, and smooth operation is achieved! The output is maximized and the output can be maintained in the middle and high-speed ranges.

■ Camshaft / Cylinder / Piston

・Auto decompression camshaft
It is possible to start the engine smoothly without burdening the cell motor.

・Adopted an all-aluminum ceramic plating cylinder
Adopted an all-aluminum ceramic plated cylinder. The ceramic plated cylinder has excellent durability, airtightness, and heat dissipation. Since the cylinder is equipped with an oil outlet to the oil cooler, you can reduce the oil temperature rise by purchasing a separate oil cooler kit. Unpainted "silver" is adopted on the cylinder surface.

・Piston made of aluminum casting
High compression specification with a compression ratio of 12.5:1 is adopted. A piston that pursues high performance and durability.
The piston top is finished with high precision by NC processing.

■ Super Head 4V + R Bore-up Kit 181cc

This kit is a set of head kit, cylinder kit, and auto decompression camshaft kit.

■ Notes

It is necessary to install the injection controller at the same time to adjust the fuel suitable for the engine part. We recommend separately purchasing a tapered manifold adapter set that allows smooth intake from the normal manifold to the intake port.

See Accessories of SP TAKEGAWA
See HONDA Moto Index Page
See Accessories for HONDA MSX125 (GROM)
See Accessories for HONDA Monkey 125