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Image for Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe from HorizonHobby
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Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe Speed 21XZ-B Spec II Ty Tessman 110% with T-2090SC Pipe
  • Overview
  • Specs
  • Reviews
  • Parts & Accessories
  • Manuals & Support
O.S. Engine Logo

Key Features

  • The 7 mm venturi insert boosts power while reducing fuel consumption
  • The 4 mm lower cooling head lowers overall center of gravity for improved handling
  • T-2090SC exhaust pipe with 90 mm manifold offers a wide variety of tuning options for truggy racers
Needed to Complete
  • 20%-30% Nitro-methane fuel
  • Fuel Filter
  • Glowplug Igniter with Integrated Battery and Leads
  • Starter Box
  • Fuel Pump
  • Assorted Tools
What's in the Box?
  • (1) Speed 21ZX-B Spec II Ty Tessman 110% Engine
  • (1) T-2090SC Exhaust Pipe
  • (1) Turbo Plug
  • (1) Collet
  • Crankshaft Comes Filled with Silicone
  • Decals
  • Manual

Overview

The Speed 21XZ-B Spec. II Ty 110% long stroke nitro engine continues the O.S. Speed legacy, with improvements that paved the way for Ty to take first place in the Nitro Truggy division at the ROAR Fuel Off-Road National Championships. The engine is available alone, or as part of a set with a T-2090SC exhaust pipe and manifold that offers lots of tuning options for racers. Get yours today and see just how much of a difference it makes in your buggy or truggy!

Video Overview

Bore: 0.64 in (16.3 mm)
Carb Type: O.S. 21J3 (B) slide valve w/7mm reducer
Crankshaft Threads: UNF1/4-28
Cylinders: Single
Displacement: 0.213 cu in (3.49 cc)
Engine (Only) Weight: 12.45 oz (353 g),12.45 oz (353g)
Height: 3.3 in (83 mm) bottom of mounting tabs/top of cylinder head
Length: 2.5 in (64.5 mm) from backplate to front bearing
Muffler Type: Tuned Muffler
Plug Type: P3 Turbo Ultra Hot Glow Plug
RPM Range: 4,000 - 42,000 rpm
Recommended Fuel: 10-30% nitro fuel
Stroke: 0.66 in (16.8 mm)
Type: 2-stroke glow powered .21 racing truggy engine
Width: 1.8 in (45 mm) at mounting tabs

Parts Listing

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Optional Accessories

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