This is the Axial .28 Spec 1s Racing Engine
with Grey Cylinder Head, Pull Starter and SG (pilot) Crankshaft.
Direct bolt-in replacement engine for any .21+ engine mount, also accepts
most aftermarket shaft drive starting systems.
FEATURES: ABC cylinder construction (Aluminum Bronze and Chrome)
Composite bodied 8.5mm 3-needle Slide Valve , factory reset
line on High-Speed Needle and flush needles make resetting to
factory specs easy
SG (pilot) crankshaft with long duration intake
Eight-port cylinder sleeve
High volume transfer port design
Removable button type combustion chamber
Roto-starter available optionally
INCLUDES: Axial .28 Spec 1s Racing Engine with Grey Cylinder Head with pull-
starter
One Instruction Sheet
One 8.5mm Restrictor
One 8.0mm Restrictor
REQUIRES: : Cold heat range
Fuel: 20-30% Nitro with at least 18% Oil Content
Manifold and Tuned Pipe (Depends on Vehicle)
SPECS: Displacement: .28 cu in (4.6cc)
Maximum RPM: 36,000
Bore: 18.6mm
Stroke: 16.9mm
Weight: 455g (16.05oz)
Distance Between Mounting Holes Same Side: 20.30mm (0.799")
Distance Between Mounting Holes Opposite Side: 37.03mm (1.45")
Height Bottom of Mounting Tabs/Top of Cylinder Head: 97.27mm (3.83")
Width of Mounting Tabs: 44.92mm (1.76")
Distance from Pull Starter to Front Bearing: 83.22mm (3.276")
Distance from Center of Engine to Front Bearing: 41.61mm (1.63")
Distance from Center of Engine to Pull Starter: 41.61mm (1.63")
COMMENTS: Some notes on Slide Valve and Rotary Carburetors:
Rotary carbs offer a larger response in the middle of the power
band. This works well for off-road applications when
response must be varied.
Slide Valve carbs provide greater response at the beginning and end
of the power band. This works well for on-road and racing
applications for fast take-offs and high speed.
jxs 10/23/06
JiM 11.09.06
ir/jxs
Click here for Units of Measure Conversion Calculators