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O.S. Speed 21XZ-B Spec III 1/8 Scale .21 Buggy Engine
O.S. Speed 21XZ-B Spec III 1/8 Scale .21 Buggy Engine

O.S. Speed 21XZ-B Spec III 1/8 Scale .21 Buggy Engine

Your Price:$444.48
Retail Price:$499.99
You Save:$55.51(11%)
Out of Stock.
Part Number:1AN00

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Related Items

  • Enhanced low-to mid-range torque provides a great advantage on tracks that require lots of power
  • The cylinder liner features 3 scavenger ports and 3 exhaust ports, and works with the crankcase to deliver more power with less fuel consumption
  • The drop-in type outer head is lighter, with a lower CG
  • Still has popular 21XZ-B features such as a silicon-potted, DLC-coated crankshaft with pressed-in tungsten weights
  • Comes with an easy-tuning 21J carburetor with 6.5 mm restrictor

FEATURES

Enhanced low-to middle-range torque provides an advantage on tracks
that requires lots of power
Newly developed cylinder liner with three scavenger ports and three
exhaust ports that functions with crankcase to deliver more power
with less fuel consumption
Silicon-potted, DLC-coated crankshaft with pressed-in tungsten
weights
Easy-to-tune 21J slide valve carburetor with 6.5mm restrictor
Lighter drop-in type outer head with a lower center of gravity

INCLUDES

Speed 21XZ-B Spec III 1/8 scale Engine with Turbo P-3 Glow Plug
Exhaust Seal Ring, two Dust Caps, 6mm, 6.5mm Carb Reducers,
Instruction Sheet

REQUIREMENTS

Glow Fuel: 10-30% nitro content, 20% recommended for break-in
Manifold and Tuned Pipe
Glow Starter and Track Equipment

SPECIFICATIONS

Displacement: 0.213 cu in (3.49 cc)
Bore: 0.641 in (16.27 mm)
Stroke: 0.661 in (16.80 mm)
Practical RPM: 4,000-42,000
Power Output: 2.61 hp/2.65 ps @ 34,000 rpm
Weight: 12.45 oz (353 g)
Crankshaft Size: UNF1/4-28
Distance Between Mounting Holes Same Side: 0.83" (21mm)
Distance Between Mounting Holes Opposite Side: 1.45" (37mm)
Height Bottom of Mounting Tabs/Top of Cylinder Head: 3.4" (86.5mm)
Width at Mounting Tabs: 1.8" (45mm)
Width of Crankcase below Mounting Tabs: 1.2" (31.6mm)
Distance from Backplate to Front Bearing: 2.5" (64.5mm)
Distance from Center of Crankcase to Front Bearing: 1.7" (44mm)
Distance from Center of Crankcase to Backplate: 0.81" (20.5mm)

Carburetor Settings, NOTE carburetor is preset at factory and
requires only very small adjustments
Needle Valve: Approximately 3.5 turns open from fully closed
Throttle: Approximately 0.5mm open from factory setting with
reducer removed
Metering Needle: Rotate until slotted head is 1.5mm away from ball
link body
Mixture Control Valve: Rotate until slotted head is flush with
carb body

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Engine Pre Broken in Service
$55.00
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