OS MAX 21 XZ-R Version II #13875

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The OS MAX 21 XZ-R Vers. II motor was developed especially for onroad competition in the 1:8... more
The OS MAX 21 XZ-R Vers. II motor was developed especially for onroad competition in the 1:8 scale. In addition to perfect performance and "drivability", the greatest focus was placed on the already legendary workmanship and long life of OS motors. This OS symbiosis of quality and outstanding performance is now also available for everyone in the segment of 1:8 onroad models. Equipped with the new 21M carburettor, the RP7 spark plug for turbo combustion chambers, and a special cooling head, it leaves nothing to be desired.
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Technical information
Distance of screw hole / longitudinal [mm]: 21
Distance of screw hole / crosswise [mm]: 37
Item Number Manufacturer: 13875
Model: 2-Takt Nitro
Diameter of fixing hole [mm]: 3,3
Bore [mm]: 16,27
Width [mm]: 45
rpm range, approx.: 4000-45000
Recommended for : Onroad models M 1:8
All-up weight [g]: 343
Height approx. [mm]: -
Stroke [mm]: 16,8
Cylinder capacity [ccm]: 3,49
Length to hub: 69,9
Output [kW / PS] at [rpm]: 2,1 (2,71) at 33000
Carburetor : 21M
Shaft thread: 1/4"-28 UNF
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