21XZ-B Engine

21XZ-B Engine

Affordable, competition-caliber performance!

The 21XZ-B delivers top-of-the-line power and performance, for far less than you'd expect. It's an ideal upgrade for 21VZ-B V-Spec users that improves torque and acceleration while weighing less and lowering the center of gravity.

21J2 carburetor
The 21J2 carburetor includes a 7 mm carb restrictor so you can gain a competitive edge!
P3 glow plug
A P3 glow plug provides quick, easy starts in all weather conditions.

  • Specifications
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  • Accessories
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Stock Number: OSMG2050
Displacement: 0.21 cu in (3.5 cc)
Bore: 0.6 in (16.3 mm)
Stroke: 0.7 in (16.8 mm)
Practical rpm: 4,000-40,000
Output: 2.51 hp @ 33,000 rpm
Weight: 12.52 oz (362 g)
Includes: 21J2 carburetor, P3 glow plug, 7 mm carb restrictor, exhaust seal and dust cap set
Requires: Glow fuel, muffler, tuned pipe and manifold

Primary Accessories

Stock Number Mfr Number Product Description Quantity Needed
 ODOP3320   ODOP3320  O'Donnell 20% Racing Quart 1

Field Equipment

Stock Number Mfr Number Product Description Quantity Needed
 DTXP0310   DTXP0310  Duratrax Ultimate Glo-Starter C 1
 HCAP2550   HCAP2550  Hobbico 4-Way Wrench w/Plug Storage 1
 OSMG2360   72413000  O.S. Super 203 Air Cleaner Assembly 1

Optional Accessories

Stock Number Mfr Number Product Description Quantity Needed
 DTXP0315   DTXP0315  Duratrax Ultimate Glo-Starter D 1
 DTXP0320   DTXP0320  Duratrax Ultra Slim AA Glow Starter 1
 DTXP3000   DTXP3000  Duratrax Rapid Heat Glo-Starter w/Charger 1
 DTXP5701   DTXP5701  Duratrax 1/10 & 1/8 Universal Starter Box 1
 DTXR0185   DTXR0185  Duratrax Engine Tuning Screwdriver 1
 DTXR0187   DTXR0187  Duratrax Engine Tuning Tool 1
 HCAP3001   HCAP3001  Hobbico After Run Engine Oil 2 Fl Oz 1
 OSMG2393   72413200  O.S. 203 Filter Elements (4) 1
 OSMG2702   72106440  O.S. M2000SC Exhaust Manifold 1
 OSMG2939   72106130  O.S. T-2060SC WN Tuned Pipe 1
 OSMG2961   72106042  O.S. Joint Spring T-2040 1
 OSMG5673   22826140  O.S. Exhaust Gasket 21RZ 1
 OSMR2976   71521000  O.S. Long Socket Wrench With Plug Grip 1
 OSMR2977   71520100  O.S. Speed Plug Wrench 1
 OSMR4000   71415300  O.S. Speed Clutch Wrench & Adjuster 1
 OSMR4001   71415200  O.S. Speed Flywheel Key 1