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  • MOTOR OS .12XZ SPEED SPEC II TUNED 11680

MOTOR OS .12XZ SPEED SPEC II TUNED 11680

  • $299,99

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Preços informados são em Dólares americanos, não incluem IVA e podem variar sem prévio aviso.


This is the O.S. 12XZ Speed Tuned Spec II Engine.


FEATURES:

  • Special coating on crankshaft reduces friction and wear
  • Tungsten weights for better balance at high RPM
  • Machined aluminum outer head with holes drilled for lighter weight and better cooling
  • Newly designed crankcase and liner port for increased torque at low to mid speed
  • 12F(B) slide valve carburetor

 

INCLUDES:

  • O.S. 12XZ(P) Speed Tuned Spec II Engine
  • Carburetor
  • 5.5mm Carb
  • Reducer
  • RP6 Turbo Glow Plug
  • Exhaust Gasket
  • two Dust Caps
  • Instruction Manual


REQUIRES:

  • Fuel: 10-30% nitro content, 20% recommended for break-in
  • Exhaust System: Depending on vehicle
  • Air cleaner assembly, glow starter and track equipment

 

SPECS:

  • Displacement: 0.128cu in (2.0cc)
  • Bore: 0.543" (13.8mm)
  • Stroke: 0.55" (14.0mm)
  • Practical RPM: 5,000 - 44,000
  • Power Output: 1.75hp @ 35,000rpm
  • Weight: 7.76oz (220g)
  • Height from crankcase bottom to top of cylinder head: 3.54" (90mm)
  • Height/crankshaft center to top of cylinder head: 3.01" (76.6mm)
  • Width including mounting tabs: 1.53" (39mm)
  • Width not including mounting tabs: 1" (25.4mm)
  • Width between mounting holes same side: 0.43" (11mm)
  • Width between mounting holes opposite side: 1.23" (31.4mm)
  • Cylinder head diameter: 1.93" (49mm)
  • Length of exposed crankshaft: 1.16" (29.5mm)
  • Length from backplate to front bearing: 1.96" (50mm)
  • Length from backplate to end of crankshaft: 3.1" (79.5mm)
  • Internal thread size at end of crankshaft: 1/4-28

 

Carburetor Settings:

  • Needle Valve, Approximately 2-1/2 turns open from fully closed
  • Throttle Stop Screw, Approximately 1mm visible from carb throat
  • Mixture Control Valve: Rotate until slotted head is flush with carburetor body
  • (Make adjustments only in small increments. Refer to manual for full break-in and carburetor adjustment instructions)

 

COMMENTS:

  • Some notes on Slide Valve and Rotary Carburetors:
  • Rotary Carbs offer a larger response in the middle of the power band. This works well for off-road applications when 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 applications for fast take-offs and high speed.

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