KITACO DOHC 181cc debuts as first kit with Twincam + 4valves this spring in 2021.
215-1432900
DOHC BIG BORE 181cc KIT
Features
MORE POWER
FINGER FOLLOWER ROCKER ARM
FORGED ALUMINIUM PISTON
FORGED H-BEAM CONROD
POWER OUTPUT CHARACTERISTICS
In detail
DOHC BIG BORE 181cc KIT
DOHC
FROM SOHC TO DOHC FOR HUGE POWER
The compact air-cooled DOHC head is optimized for GROM / MONKEY 125 and is designed for huge power.
SEMI-CAM GEAR TRAIN
ACHIEVES DOHC BY ADOPTING A SEMI-CAM GEAR TRAIN SYSTEM
The cam gear and Idle gear are made by cutting tough nickel-chromium-molybdenum steel.
FINGER FOLLOWER ROCKER ARM
DLC-treated finger follower rocker arm is adopted.
Finger follower rocker arms are adopted to reduce the inertial mass. Contributes to be performance improvement in the high rpm range.
VALVE
Two valve face diameter 24.5mm intakes and two 21mm exhaust valves are used.
By adopting 4mm O.D. valve stem, the throat diameter is expanded.
VALVE SPRING
Variable pitch valve spring is adopted.
The variable pitch valve spring is adopted and the load characteristic is changed to suppress the valve surging.
VALVE LAYOUT
Achieves a valve angle that is as narrow as possible under limited conditions due to DOHC.
COMBUSTION CHAMBER
Place 4 valves in pentroof type combustion chamber.
The maximum size valve with a 63mm bore diameter is placed in consideration of the safety margin.
CAMSHAFT
Created with a cam profile optimized for DOHC.
Surface treatment is applied to improve initial familiarity.
PORT LAYOUT
Due to the shift to DOHC, the best port layout was adopted under limited conditions, and the port diameter was set to 28 mm for intake and 23 mm for exhaust.
The intake / exhaust port is designed in the same position as STOCK.
HEAD SIDE COVER
Head side cover is made with aluminum die-cast and barrel polishing finish.
M10-P1.25 hole is provided, and blow-by gas can be discharged as an option.
FORGED ALUMINIUM PISTON
Compression ratio is set at 11.5:1
FORGED H-BEAM CONROD
57.9mm stronger crankshaft with H-Beam conrod is adopted.
Forged H-Beam conrod is durable enough for high output engine.
OUTPUT CHARACTERISTICS
POWER OUTPUT CHARACTERISTICS
Tested at Kitaco facility with following parts.
- DOHC Big Bore 181cc
- 34mm Throttle Body
- Racing Exhaust
- 6 DISC CLUTCH
- i-Map(Prototype)
Parts
REPLACEMENT AND OPTIONAL PARTS
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