Max Power – On road MX 21 MAX XL7 – 3.5cc
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| Technical details | |
| Capacity | 3,49 cc |
| Power | 2,79 HP |
| R.P.M. | 38.100 g/min. |
| Bore | 16,26 mm |
| Stroke | 16,80 mm |
| Ports | 7 |
| Sleeve | ABC |
| Piston | BAR (CNC) |
| Crankshaft Diameter | 14 mm |
| Crankshaft with Tungsten | YES |
| Silicone To The Inside | YES |
| Crankshaft Type | TURBO SG |
| Glow Plug | TURBO |
| Carburetor | SINGLE ADJUSTING |
| Weight | 330 gr. |
Categorized in Max Power, Nitro motoren