Nason Cylinder head - bare - 909350

Specifications
Combustion Chamber Volume:	64cc
Intake Runner Volume:	195cc
Intake Port Size H x W:	2.090" x 1.161"
Exhaust Runner Volume:	74cc
Exhaust Port Size H x W:	1.401" x 1.421"
Spark Plug Angle:	Straight
Intake Valve Size:	2.020"/51.30mm
Exhaust Valve Size:	1.600"/40.64mm
Valve Length:	Standard Length
Valve Guide Seal Diameter:	0.531"/13.48mm
Valve Guide Material:	Manganese Bronze
Maximum Valve Spring Diameter:	1.550"/39.37mm

Description

Bare Head - Alloy Performance - Straight Plug, 64cc Chamber

Spark Plugs, Thread = 14mm x 1.25mm, Seat = Gasket, Reach = 19mm

Spark Plugs, NGK BCP5E Style

Inlet Manifold Suits Early (12 Bolt) & Late (8 Bolt)

Valve Covers Suits Early (Perimeter Bolt) & Late (Center Bolt)

Requires Screw In Rocker Studs & Guide Plates

Flow Data @ 28"(CFM) With 2.020" & 1.600" Valves

Intake

@.200" = 120

@.300" = 184

@.400" = 214

@.500" = 232

@.600" = 239

Exhaust

@.200" = 60

@.300" = 120

@.400" = 141

@.500" = 155

@.600" = 164