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This is the Ofna Jammin' .12 Rear Exhaust Off-Road Engine without Pull Starter.
                    Ideal for the Ofna CRT.5 Mini Truggy.

FEATURES: ABC construction "A"luminum piston with "B"rass liner that is
            "C"hrome plated
          Three port liner, bushing equipped connecting rod
          Ball bearing-supported crankshaft
          Composite bodied Slide Valve Carburetor with Red silicone boot
          Red anodized aluminum cooling head
          SG type balanced crankshaft

INCLUDES: Ofna Jammin' .12 Rear Exhaust Off-Road Engine, drive hub and parts
            list

REQUIRES: Fuel: 20% nitro
          Glow Plug: Hot heat range, OSMG2691
          Glow Starter and track equipment

SPECS:    Needle Settings;
            Needle Valve: 3-3½ turns from closed
            Low Speed Needle: 5 turns out from closed, do not adjust until
              needle valve is properly set for power and top speed
            Barrel Stop Screw: 1/16" gap to start new engine, open more for
              faster idle

          Bore:   .54" (13.80mm)
          Stroke: .55"    (14mm)
          Displacement: .12 cu in (2.1cc)
          RPM: 29,000
          Claimed Horsepower: 1 HP
          Weight: 7.7oz (220g)
          Width between mounting holes same side:        .43" (11mm)
          Width between mounting holes opposite side:    1.2" (32mm)
          Crankcase width below mounting tabs :          .98" (25mm)
          Distance from coverplate to drive hub:         2.7" (69mm)
          Distance from coverplate to end of crankshaft: 3.2" (81mm)
          Height/bottom of crankcase to top of cylinder head:    3.5" (88mm)
          Height/bottom of mounting tabs to top of cyinder head: 2.9" (74mm)

COMMENTS: For pull start version order OFNG5125.
          Some points on Slide Valve and Rotary Carburetors-
          Rotary Carbs offer a larger response in the middle of the engine's
            power band. This is desirable for off-road applications where
            throttle 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 vehicles
            demanding fast take-offs and high speed.

                                                                    jxs 5/23/07
                                                                         ir/jxs




– If you need more information, use these Ofna resources –

E-mail: help@ofna.com
Web Site: http://www.ofna.com/
Phone: 949-586-2910


 
Postal Address:
Ofna
7 VANDERBILT
IRVINE, CA 92618  








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