====== OS MAX 12CV & 12CV-X Series ======
This is for both the original 12CV and the 12CV-X.
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===== OS MAX 12CV =====
==== Specifications ====

^Variant ^ Notes 
| Manufacturer | OS Engines |  
| Re-branded Engine | No |
| Brand | OS MAX |
| Model | OS MAX 12CV |
| Evolution of | N/A |
| Part # | 11241 | 
| MSRP | N/A | 
| Bore | 14.0mm / 0.551in |
| Stroke | 13.7mm / 0.539in |
| Displacement | 2.11cc / 0.129cu.in |  
| Weight | 511g / 7.45oz |
| Instruction Manual | N/A |
| Exploded View | [[http://nitroenginewiki.com/images/osspeed13893/13893_13894_OSS_21VSpec.pdf|Click]] |

==== Crank Specifications ====
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^Variant ^ Notes 
| Crankshaft  | Steel |
| Crank Type | ??mm Threaded |


==== Crankcase Specifications ====
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^Variant ^ Notes 
| Rear Bearing | Steel 14.00 x 25.40 x 6.00 |
| Front Bearing | Steel 7.00 x 19.00 x 6.00 |
| Case | Cast Aluminum Black Oxide Coated |
| Backplate | Bump Start |
| Exhaust | Side |

==== Rod Specifications ====
^Variant ^ Notes 
| Rod | Aluminum with brass bushing |
| Rod Length | ??mm |

==== Piston/Sleeve Specifications ====
^Variant ^ Notes 
| Piston/Sleeve Type | ABC(Aluminum Piston, Brass sleeve, Chrome Liner) |
| Intake Ports | 3 |
| Exhaust Ports | 1 |


==== Carburetor Specifications ====
Carb Needle settings are default after breakin.
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^Variant ^ Notes 
| Carburetor Size | OS 21H |
| Carburetor Size | 9mm |
| Carburetor Style | Slide |
| Carburetor Material |Aluminum Body with Nylon insulator |
| Carburetor Adjustment | 3 Needle |
| Carburetor Restrictors | 7mm, 8mm, 9mm |
| Carb LSN | - | 
| Carb MSN | - | 
| Carb HSN | - | 


==== Head Button/Cooling Head Specifications ====
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^Variant ^ Notes 
| Head Button | Turbo |
| Supplied Glow Plug | OS P3 |
| Cooling Head | Black Oxide coated Magnesium/Black anodized Aluminum |




 





==== Timing Specs ====
^ ^  
| Intake Rotor Timing Opening | N/A |
| Intake Rotor Timing Closing | N/A |
| Intake Rotor Timing Duration | N/A |
| Transfer Timing Height | N/A |
| Transfer Timing Duration | N/A |
| Exhaust Timing Height | N/A |
| Exhaust Timing Duration | N/A |


==== Performance ====
^ ^  
| Manufacturer Claimed Peak | 0.56ps @ 29,000 |
| X-Dyno Peak Power(HP) | N/A |
| X-Dyno Peak Torque(oz-in) | N/A |
| X-Dyno Peak RPM Measured | N/A |


==== Variants ====
^Variant ^ Notes 
| [[osmax12cv|OS MAX 12CV]] | Original, Bump Start Backplate, 211g/7.45oz, Part#11241 |  
| [[osmax12cv|OS MAX 12CV-X]] | Same as Original, Pull Start Backplate, 269g/9.5oz, Part#11242 |   
| [[osmax12cv|OS MAX 12CV Hyper]] | Same as Original, Bump Start Backplate, Gold Head 190g/6.7oz, Part#11273 |  
| [[osmax12cv|OS MAX 12CV-X Hyper]] | Same as Original, Pull Start Backplate, Gold Head 248g/8.75oz, Part#11273 |