Product Description
GOOFIT Group-12 47mm big bore cylinder head includes intake and exhaust valves plus gaskets. It is listed as a replacement for 4-stroke 139QMB, 139QMA, and GY6 80cc non-EGR engines used in ATVs, go-karts, quad vehicles, and scooters. Verify the dimensions, bolt spacing, and spark plug type before ordering.
Product Specifications
BrandGOOFIT
Manufacturer Part NumberGroup-12
Item Weight2.48 pounds
Package Dimensions5.98 x 5.75 x 3.15 inches
Item model numberGroup-12
Explicit Manufacturer Part NumberGroup-12
Cylinder inner diameter47mm / 1.85 in
Intake valve diameter20mm / 0.78 in
Exhaust valve diameter30mm / 1.18 in
Intake-side bolt installation spacing45mm / 1.77 in
Exhaust-side bolt installation spacing50mm / 1.96 in
Spark plugA7TC
Engine type4-stroke, non-EGR
Included componentsCylinder head, intake valve, exhaust valve, and gaskets