| Overview
The 28 Spec 1s is a .28 cubic inch big block engine featuring a machined billet aluminum heat-sink head for extra cooling, dual bushing aluminum connecting rod, true ABC chrome sleeve construction for durability, and a three needle 8.5mm slide carburetor with a composite body for better performance at higher temperatures. The carburetor features a factory re-set line on the high speed needle, and flush needles making re-setting, to baseline factory specifications, quick and easy. There is also an optional Turbo Button head available.
This is a direct bolt-in replacement engine for any .21+ engine mount, and will accept most aftermarket shaft drive starting systems.
Specs
Bore:18.6mm
Stroke:16.9mm
RPM Range:Maximum RPM 36,000
Cylinder Type:ABC
Starting System:Pullstarter
# of Ports:8
Carb Type:8.5mm Composite Slide Carb
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