704-799-2192

MC623000 KOSO Performance 4V Head ONLY + Piston - '19-'21 Honda Monkey 125 (Liability Waiver Required)

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    • 32% less
    Market price: $1000.00, you save $321.00
  • $679.00

KOSO Performance 4V Head ONLY + Piston (MC623000)

Fits '19-21 Honda Monkey 125- PREMIUM GAS


'MUST Use with Premium Gas

"REQUIRES 170cc CYLINDER"

Requires a Fuel Controller & A/F Monitor (sold Separately) for Proper fueling.

Its Highly recommended to run a 16t or 17t Front Sprocket with this BBK
To keep the revs in the PowerBand

Includes:
• forged piston
• performance camshaft
• camshaft bearing
• rocker arms
• 4 valve cylinder head
• intake manifold & gaskets


Requires a Fuel Controller & A/F Monitor (sold Separately) for Proper fueling.


** Kit should be installed by a certified mechanic to ensure proper function. Improper installation could result in catastrophic engine failure.
** Highly Recommended To install Temp. Gauge and A/F Monitor to ensure proper running Temperatures and Add Longevity to the Motor.

Qty:  
    • SKU
      MC623000
  • Add HardRacing "Factory Logo" T-Shirt : only $5.95
    No Thanks., Yes, please add Small/BLACK (+$6.95), Yes, please add MED/BLACK (+$6.95), Yes, please add LARGE/BLACK (+$6.95), Yes, please add XL/BLACK (+$6.95), Yes, please ADD (2XL)BLACK (+$8.95 )
  • Add Cam Chain Tensioner Arm ?
    No Thanks, I don't need it., Yes, please add Takegawa Chain Tensioner Arm & SPARE WHEEL (+$94), Yes, please add Koso Cam Chain Tensioner Arm (+$84.95)
  • WAIVER
    Yes, I understand I will need to sign a Release Waiver
  • Required Spark Plug?
    No thanks, I Already have this Exact Spark Plug., Yes, please add NGK ER9EH Spark Plug (+$9.99)
  • PCX150 Injector
    No Thanks, I already have one., Yes, please add PCX150 Injector (+$45)
  • Add Optional Koso 34mm Throttlebody?
    No, I don't need the Koso 34mm Throttlebody, Add Koso 34mm Throttlebody DY623013 & KN POD Air Filter & Fairing Brace, Add Koso 34mm Throttlebody DY623013 (+$119)
  • Add Fuel Controller?
    No Thanks, I already have Both the PCV and WBC2., YES, please add Both Dyno Jet PCV (+$319) & WBC2 (+$249), Yes, please add Dyno Jet PCV (+$319) & WBC2 (+$249) & A/F Gauge (+$68), I Already have a PCV, so I ONLY Need a WBC2 (+$249), I Already have a PCV, so I ONLY Need a WBC2 (+$249) & A/F Gauge (+$68)
  • Add Digital Temp. Gauge ?
    Yes, please add KOSO Engine/Head Digital Temperature Gauge (+$89.95), No thanks, I don't need an Engine/Head Digital Temperature Gauge, Yes, please add OPMID Engine/Head Digital Temperature Gauge (+$79.95)
  • Sprockets?
    No thanks, I don't need a Sprockets, Yes, please add 16t Front Sprocket (+$7.99 ), Yes, please add 16t Front ($7.99) & 32t Rear (+$29.99 ), Yes, please add 17t Front Sprocket (+$7.99 )
  • Engine Temp. Reducer Package
    No Thanks., Yes, please add Kitaco Clutch Cover, FIVE "5" Row Oil Cooler, & Tak. Super Oil Pump (+ $499)
  • High Flow Oil Pump?
    No Thanks, I don't need it., Yes please add Takegawa High Flow Oil Pump (+$57)