MB623003 KOSO Performance 170cc 4V Big Bore Kit - '19-'21 Honda Monkey 125 (Liability Waiver Required)

KOSO Performance 170cc 4V Big Bore Kit (MB623003)

Fits '19-21 Honda Monkey 125- PREMIUM GAS

'MUST Use with Premium Gas
Watch this video for more details :
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
• performance camshaft
• camshaft bearing
• rocker arms
• 4 valve cylinder head
• intake manifold & gaskets

** This BBK uses a smaller 8mm Spark Splug, we highly recommend adding to your order.

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.