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| 018 | 021 | 025 | 026 | 029 Super | 036 Pro | |
| Displacement | 31.8 cc 1.95 c.i. |
35.2 cc 2.15 c.i. |
44.3 cc 2.7 c.i. |
48.7 cc 2.97 c.i. |
57.0 cc 3.4 c.i. |
61.5 cc 3.75 c.i. |
| Engine Power | 1.4 kW 1.8 bhp |
1.3 kW 1.8 bhp |
2.2 kW 3.0 bhp |
2.6 kW 3.5 bhp |
2.8 kW 3.7 bhp |
3.3 kW 4.4 bhp |
| Powerhead Weight | 8.6 lbs. | 9.9 lbs. | 10.3 lbs. | 10.6 lbs. | 13.2 lbs. | 12.5 lbs. |
| Bar Length | 12"-14" | 12"-16" | 12"-18" | 16"-24" | 16"-24" | 16"-28" |
| Anti-Vibration System | Standard | Standard | Standard | Standard | Standard | Standard |
| Electronic Ignition | Standard | Standard | Standard | Standard | Standard | Standard |
| Quickstop Chain Brake | Standard | Standard | Standard | Standard | Standard | Standard |
| Ematic Bar Lubrication | N/A | N/A | N/A | N/A | Standard | Standard |
| Side Access Chain Tensioner | N/A | Optional | Standard | Standard | Standard | Standard |
| Quick Chain Adjuster | Optional | Optional | Optional | N/A | N/A | N/A |
| Elastostart | Optional | Optional | Optional | Optional | Optional | Optional |
| Master Control Lever | Standard | Standard | Standard | Standard | Standard | Standard |
| IntelliCarb | N/A | N/A | N/A | N/A | Standard | Standard |