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O.S.Speed R21GT Engine

Item No.
OS Engines - OSMG2095
$683.65
O.S.Speed R21GT Engine
Backorder | Back Order
Brand Logo
5 out of 5 Customer Rating

O.S.Speed R21GT Engine

Item No.
OS Engines - OSMG2095
$683.65
Product $683.65
Add Ons
Estimated Total: $683.65

O.S.Speed R21GT Engine

Item No.
OS Engines - OSMG2095
5 out of 5 Customer Rating
Product $683.65
Add Ons
Estimated Total: $683.65
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Overview

We are proudly announcing O.S. SPEED R21GT for a relatively new category 1/8 GT class. The new engine aims at IFMAR world championship to be held in the United States in January, 2020. So the design of the engine is fully conformed to IFMAR regulation. The crankcase is modified version of R2101, cylinder/piston is new design: 5 scavenging ports + 3 exhaust port, the crankshaft is also newly designed: double counter weight made of Phosphor bronze for better torque, of course the crankshaft is DLC coated to minimize mechanical friction and with silicon filler for light weight. The carburetor is also new design, 22E(B)GT double adjustment type carburetor for smooth and better response from cornering with a 7.0mm restrictor, which conform to IFMAR regulation. The cooling head is designed to optimize heat dissipation and light weight.

Video Overview

 

Piston & Cylinder
Piston & Cylinder

5-scavenging port + 3 exhaust port design is conforming to IFMAR regulation

 

Crankshaft
Crankshaft

DLC coated, Silicon filler, double counter weights for powerful torque and response

 

 
Carburetor
Carburetor

New carburetor 22E(B)GT: Double adjust type, smooth acceleration from cornering

 

Product Specifications

Product Height Bottom/Mounting Tabs to top of Cylinder Head 3.4" (86.5mm)
RPM Range 4,000 - 42,000
Cylinder Type Five Scavenging Ports, three Exhaust Ports
Engine (Only) Weight 13.2oz (369g)
Displacement 0.213 cu in (3.49cc)
Oil Type & Content 12-16% Synthetic Oil Mixture in Fuel
Crankshaft Threads UNF 1/4-28
Product Length Backplate to Front Bearing, 2.5" (64.6mm)
Bore 0.633" (16.08mm)
Crankshaft Type SG
Power Type Glow
Plug Type RP6 Turbo Type, Medium Heat Range
Stroke 0.677" (17.20mm)
Cylinders Single
Product Width At Mounting Tabs 1.8" (45mm),