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MB623002 KOSO Performance 170cc 2V Big Bore Kit - '13-'20 Honda GROM / GROM SF (Liability Waiver Required)

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    Market price: $600.00, you save $240.05
  • $359.95

KOSO Performance 170cc 2V Big Bore Kit (MB623002)

Fits '13-'20  Honda GROM / GROM SF    - PREMIUM GAS


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'MUST Use with Premium Gas

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:
• 170cc ceramic coated cylinder
• Forged piston
• Pin, Rings, Clips
• Banjo Bolts w/ crush washers
• Base gasket
• Head gasket


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
      MB623002
  • 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 ($87) & SPARE WHEEL ($7), Yes, please add Koso Cam Chain Tensioner Arm (+$84.95)
  • Kitaco H-D Upgraded Starter :
    No Thanks, I don't need one, Yes, please add Kitaco HD Starter (758-1432100) +$109
  • Crank Shaft Support Bearing ?
    No Thanks, I don't need it., Yes, please add Crank Shaft Support Bearing ("OG" GROM) 01-10-0134 (+$99.95), Yes, please add Crank Shaft Support Bearing (GROM "SF") 01-10-0138 (+$99.95)
  • WAIVER
    Yes, I understand I will need to sign a Release Waiver
  • Add Finbro SuperAwesome Head 3.0
    No Thanks, I don't need an Upgraded Head, Yes please add Finbro Super Awesome 3.0 Head, Yes please add Finbro Super Awesome 3.0 Head ($299.95) & Takegawa Camshaft ($99)
  • PCX150 Injector
    No Thanks, I already have one., Yes, please add PCX150 Injector (+$49.95)
  • Add Optional Koso 34mm Throttlebody?
    No, I don't need the Koso 34mm Throttlebody, Add Koso 34mm Throttlebody DY623013 & Koso Intake Manifold DP623001 & KN Pod Filter & Fairing Brace, Add Koso 34mm Throttlebody DY623013 (+$119)
  • Add Fuel Controller?
    No Thanks, I already have a Fuel Controller, Yes, please add aRacer Mini X & AF2 (+$765)
  • Add Digital Temp. Gauge ?
    No thanks, I don't need an Engine/Head Digital Temperature Gauge, Yes, please add KOSO Engine/Head Digital Temperature Gauge (+$99)
  • 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 (+ $597)
  • High Flow Oil Pump?
    No Thanks, I don't need it., Yes please add Takegawa High Flow Oil Pump (+$57)