[Specification] Valve diameter IN: 25mm x 2 / EX: 21.5mm x 2 Valve Stem Shaft Diameter: 4. 5mm for both IN and EX Bore Diameter: 63mm Stroke: 57.9mm (Stock) Compression ratio 12.5: 1
[Components] ・FI CON2 (Injection controller) ・Manifold Adapter Set for Stock Throttle Body ・Spark Plug
*The FI CON2 included in the kit is only for MSX125, so it cannot be installed on GROM.Please buy the one for GROM. *The contents of the web catalog are current as of January 2020. *There may be changes in product specifications due to the manufacturer's reasons. *Depending on the lot, the product may be delivered with the old price and label with the old JAN code before the price change.
■Super Head 4V+R (1 cam, 4 valves) Two intake / exhaust valves are used each to increase the valve curtain area and achieve high intake / exhaust efficiency. The original head shape was designed to balance the center plug, valve pinching angle, combustion chamber shape, and port shape to achieve a higher output than the stock head. The combustion chamber is finished with high accuracy by NC machining.
The highest class of SOHC intake and exhaust efficiency [Valve diameter] IN: 25mm x 2 / EX: 21.5mm x 2 Valve Stem Shaft Diameter: 4. 5mm for both IN and EX The use of unequal pitch valve springs prevents surging at high RPM. The cylinder head surface is painted black. Since the inspection breather cover is included, you can release the internal pressure of the engine by purchasing the oil catch tank kit separately. Inspection Breather Cover and Inspection Cover are machined from aluminum and plated with beautiful chrome. L. Cylinder head side cover is made of die-cast aluminum with barrel polished finish.
Aluminum forged roller rocker arms The frictional resistance with the camshaft is reduced, and smooth operation is realized!!! Maximizing the output and maintain the output in the mid to high speed range can be done.
■Camshaft / Cylinder / Piston auto decompression camshaft It is possible to start the engine smoothly without putting a burden on the starter.
All aluminum ceramic plated cylinders. Bore Diameter: 63mm Stroke: 57.9mm (Stock) Ceramic plated cylinders have excellent durability, airtightness and heat dissipation. Since the cylinder is equipped with an oil outlet to the oil cooler, the oil temperature rise can be suppressed by purchasing the oil cooler kit separately. The surface of the cylinder is painted black.
Cast aluminum piston Compression ratio 12.5: High comp specification with 1 Pistons designed for high performance and durability. The piston top is NC machined for high precision.
■FI CON2 for Superhead 4V+R (Injection Controller) A variety of pre-set 3D correction maps for the Superhead 4V+R are built in, and can be set with just a rotary switch on the unit.No complicated PC connection is required. Large capacity injectors included. The built-in correction map can be fine-tuned by using the rotary switch on the main unit to make the map darker or lighter overall. It also has a rev limiter cut function. A special harness is included, so installation can be done with minimal wiring. There are two types of FI CON2, one for GROM and the other for MSX125, and they are exclusive for each vehicle.
■Super Head 4V+R Combo Kit 181cc Combo kit includes FI CON2 (Injection Controller) for fuel adjustment suitable for Superhead 4V+R Big Bore Kit 181cc engine parts, manifold adapter set for stock throttle body and spark plugs.
■Conventional part number:01-05-0502
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
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