Naraku Cylinder Head 4 valves 22/25 66mm Yamaha X-Max / YZF / WR 125 11-17

Naraku 4-valve Cylinder Head 22/25 66mm for Yamaha X-Max / YZF / WR 125 11-17.

If you have installed a 66mm big bore cylinder and the engine is still not performing according to the setup you have installed, it means that the original cylinder head is falling short. This Naraku cylinder head features 25mm Intake valves and 22mm Exhaust valves, larger than the standard ones, allowing for greater performance and higher top speed. The reinforced valve springs can withstand much higher RPM ranges without burning the valves. The combustion chamber is 66mm, designed to match the Naraku Big Bore NK600.76 cylinder.

Attention: when changing the cylinder head, the carburetion or fuel injection must be readjusted by changing the ECU, for example, with a Malossi Force Master 5519537. It is not a plug-and-play installation.

Technical specifications

• Combustion chamber diameter: 66 mm
• Intake valves: 25 mm
• Exhaust valves: 22 mm
• Number of valves: 4
• Springs: Reinforced
• Manufacturer: Naraku
• Base engine: Yamaha YI-3 (125cc 4-Stroke)
• Cylinder compatibility: Naraku Big Bore NK600.76 (66mm)

Compatible models

BETA

• RR 125 ENDURO 4-Stroke LC E3 <2017
• RR 125 MOTARD 4-Stroke LC E3 <2017

FANTIC MOTOR

• CABALLERO REGOLARITA 125 4-Stroke LC E3 <2017
• CABALLERO SCRAMBLER 125 4-Stroke LC E4 2018-2020
• ENDURO E 125 CASA 4-Stroke LC E3 <2017
• ENDURO E 125 PERFORMANCE 4-Stroke LC E3 <2017
• ENDURO ER 125 COMPETITION 4-Stroke LC E3 <2017
• MOTARD M 125 CASA 4-Stroke (SOHC) LC E3 <2017
• MOTARD M 125 PERFORMANCE 4-Stroke LC E3 <2017
• MOTARD MR 125 COMPETITION 4-Stroke LC E3 <2017

HM MOTO

• CRE BAJA 125 4-Stroke LC
• CRE BAJA RR 125 4-Stroke LC
• CRM F 125 X DERAPAGE 4-Stroke LC
• CRM F 125 X RR DERAPAGE 4-Stroke LC
• CSF 125 CITY 4-Stroke LC
• CSF 125 LOCUSTA 4-Stroke LC

HUSQVARNA

• SMR 125 4-Stroke LC E3 2011-2017
• SMS 4 125 4-Stroke LC E3 2011-2017
• TE 125 4-Stroke LC E3 2011-2017

HYOSUNG

• XRX 125 LC ENDURO / SUPERMOTO MHT1 >2014

MBK

• CITYLINER 125i >2009
• SKYCRUISER 125i 2006-2009
• SKYCRUISER 125i 2010-2012
• SKYCRUISER 125i ABS 2011-2012

MOTORHISPANIA

• GUN-R 125 4-Stroke LC
• KN1 125 4-Stroke LC
• KN2 125 4-Stroke LC
• RX 125 R 4-Stroke LC
• RANGER 125 4-Stroke LC

RIEJU

• MARATHON CROSS 125 4-Stroke LC E3 <2017
• MARATHON PRO 125 4-Stroke LC E3 <2017
• MARATHON SM 125 4-Stroke LC E3 <2017
• MARATHON SM PRO 125 4-Stroke LC E3 <2017
• RS3 125 4-Stroke LC <2017
• RS3 NKD NAKED 125 4-Stroke LC

YAMAHA

• MT-125i 4-Stroke LC E3 2014-2017
• WR125-R ENDURO 4-Stroke LC E3 2009-2017
• WR125-X SM 4-Stroke LC E3 2009-2017
• X-CITY 125i E3 2008-2017
• X-MAX 125i 2006-2009
• X-MAX 125i 2010-2012
• X-MAX 125i E3 2013-2017
• YZF-R 125 4-Stroke LC E3 2008-2013
• YZF-R 125 4-Stroke LC E3 2014-2017