osspeed21vzbspecii
Differences
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| osspeed21vzbspecii [2026/08/02 10:17] – created nitroadmin | osspeed21vzbspecii [2026/08/30 15:19] (current) – [Specifications] nitroadmin | ||
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| ==== Specifications ==== | ==== Specifications ==== | ||
| - | ^Variant | + | ^ ^ |
| | Manufacturer | OS Engines | | | Manufacturer | OS Engines | | ||
| | Re-branded Engine | No | | | Re-branded Engine | No | | ||
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| ==== Crank Specifications ==== | ==== Crank Specifications ==== | ||
| - | {{ http:// | + | {{ http:// |
| ^Variant ^ Notes | ^Variant ^ Notes | ||
| | Crankshaft | | Crankshaft | ||
| Line 34: | Line 34: | ||
| | Case | Cast Aluminum Black Oxide Coated | | | Case | Cast Aluminum Black Oxide Coated | | ||
| | Backplate | Bump Start | | | Backplate | Bump Start | | ||
| + | | Exhaust | Rear | | ||
| ==== Rod Specifications ==== | ==== Rod Specifications ==== | ||
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| ==== Carburetor Specifications ==== | ==== Carburetor Specifications ==== | ||
| - | Uses OS 21J carburetor. | + | Carb Needle settings are default after breakin. |
| - | {{ http:// | + | {{ http:// |
| ^Variant ^ Notes | ^Variant ^ Notes | ||
| + | | Carburetor | OS 21J | | ||
| | Carburetor Size | 7mm | | | Carburetor Size | 7mm | | ||
| | Carburetor Style | Slide | | | Carburetor Style | Slide | | ||
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| | Carburetor Adjustment | 3 Needle | | | Carburetor Adjustment | 3 Needle | | ||
| | Carburetor Restrictors | 6mm, 6.5mm, 7mm | | | Carburetor Restrictors | 6mm, 6.5mm, 7mm | | ||
| - | | Carb LSN | - | | ||
| - | | Carb MSN | - | | ||
| - | | Carb HSN | - | | ||
| ==== Head Button/ | ==== Head Button/ | ||
| - | {{ http:// | + | {{ http:// |
| ^Variant ^ Notes | ^Variant ^ Notes | ||
| | Head Button | Turbo | | | Head Button | Turbo | | ||
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| ==== Timing Specs ==== | ==== Timing Specs ==== | ||
| - | ^ ^ | + | //Main article: [[timing# |
| - | | Intake Rotor Timing | + | |
| - | | Intake Rotor Timing Closing | 74.5° ATDC | | + | |
| - | | Intake Rotor Timing Duration | 239° | | + | |
| - | | Transfer Timing Height | 3.5mm from BDC | | + | |
| - | | Transfer Timing Duration | 114° | | + | |
| - | | Exhaust Timing Height | 6.4mm from BDC | | + | |
| - | | Exhaust Timing Duration | 114° | | + | |
| - | TIMING DIAGRAM HERE | + | ==== Downloads ==== |
| + | ^ ^ | ||
| + | | Instruction Manual | [[http:// | ||
| + | | Exploded View | [[http:// | ||
| ==== Performance ==== | ==== Performance ==== | ||
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| ==== Variants ==== | ==== Variants ==== | ||
| ^Variant ^ Notes | ^Variant ^ Notes | ||
| - | | OS Speed 21VZ-B V-Spec | Original, Magnesium cooling head, 21H Carb 320.5g/ | + | | [[osspeed21vzbv-spec|OS Speed 21VZ-B V-Spec]] | Original, Magnesium cooling head, 21H Carb 320.5g/ |
| - | | OS Speed 21VZ-B V-Spec AL | Same as original, Aluminum cooling head, 361.8g/ | + | | [[osspeed21vzbv-spec|OS Speed 21VZ-B V-Spec AL]] | Same as original, Aluminum cooling head, 361.8g/ |
| - | | OS Speed 21VZ-B | + | | [[osspeed21vzbspecii|OS Speed 21VZ-B SpecII]] | Same as original, Drilled Aluminum cooling head, 21J Carb 349g/ |
| - | | Protek 321B Samurai V2 | Same as Speed, Drilled Aluminum cooling head, 355g/ | + | | [[protek321bsamurai|Protek 321B Samurai V2]] | Same as Speed, Drilled Aluminum cooling head, 355g/ |
| - | | Ninja JX21 B01 | 5 port version of speed, OS 28XZ Case, no slugs in crank, Aluminum cooling head, 361.8g/ | + | | [[ninjajx21bo1|Ninja JX21 B01]] | 5 port version of speed, OS 28XZ Case, no slugs in crank, Aluminum cooling head, 361.8g/ |
| - | | Ninja JX21 B01A | Same as original JX, Drilled Aluminum cooling head, 374g/ | + | | [[ninjajx21bo1a|Ninja JX21 B01A]] | Same as original JX, Drilled Aluminum cooling head, 374g/ |
osspeed21vzbspecii.1785683859.txt.gz · Last modified: by nitroadmin