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REFERENCE
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763
BIG BORE KIT
for
HONDA GROM
Unleash all the power your Honda GROM can handle with
the Koso 170cc Big Bore kit.
CAMSHAFT KIT
for
HONDA GROM
• The Koso 240° camshaft increases power and
torque compared to the stock camshaft.
• Can be used with a stock engine, or for optimal gains, use with
the Koso 170cc Big Bore Kit.
Not legal for use in California on pollution controlled
vehicles, race use only in California - waiver available.
Description WPS# List
GROM big bore kit
27-5800 $344.95
REPLACEMENT PARTS
Piston/ring kit
27-5801 $99.95
Top end gasket kit
27-5802 29.95
Banjo bolt kit
27-5803 14.95
Description WPS# List
GROM camshaft
27-5804 $129.95
Kit includes:
• Ceramic coated aluminum cylinder
• 61mm bore, 11.5:1 compression ratio forged piston/ring
kit (premium fuel required)
• Top end gasket kit and banjo bolts
Not legal for use in California on pollution controlled
vehicles, race use only in California - waiver
available.
BIG BORE KIT
w
/
4-VALVE
CYLINDER HEAD
for
HONDA GROM
Description
WPS# List
GROM 170cc big bore kit with 4-valve cylinder head
27-5810 $949.95
Kit Includes:
• Koso ceramic coated big bore cylinder kit forged w/4-valve piston
and gaskets
• Koso 4-valve cylinder head (complete with camshaft, rocker arms,
intake manifold, and all other parts shown in the picture)
•
Not legal for use in California on pollution controlled vehicles,
race use only in California - waiver available.
HIGH FLOW OIL PUMP
for
HONDA GROM
• Highly recommended for use with all engine upgrades
• Increases oil flow by 40%
• Helps prevent engine failure and lowers oil temperature
Description
WPS# List
GROM High-Flow oil pump
27-5811
$47.95
See page 476 for Koso Grom fuel system parts
ENGINE / CLUTCHES