250 | 250 | 250 | 250 | 175 | 175 | |
ENGINE | StilettoMX | Stiletto T.T. | Pioneer | Plonker | Stiletto | Pioneer |
1. Type | Two-Cycle | Two-Cycle | Two-Cycle | Two-Cycle | Two-Cycle | Two-Cycle |
2. No of cylinders | One | One | One | One | One | One |
3. Bore | 72 mm | 72 mm | 72 mm | 72 mm | 60.9 mm | 60.9 m m |
4. Stroke | 60 mm | 60 mm | 60 mm | 60 mm | 60 mm | 60 mm |
5. Displacement | 244 cc | 244 cc | 244 cc | 244 cc | 175 cc | 175 cc |
6. Compression Ratio | 12.3 to 1 | 13.4 to 1 | 12.3 to 1 | 9.8 to 1 | 13.0 to 1 | 10.2 to 1 |
7. Piston Sizes | Standard | Standard | Standard | Standard | Standard | Standard |
Available | 1st over (+.2 mm) | 1 st over (+. 2 m m) | 1 st over (+.2 m m) | 1st over (+.2 mm) | 1 st over (+. 2 m m) | 1 st over (+.2 mm) |
2nd over (+A mm) | 2nd over (+A mm) | 2nd over (+A mm) | 2nd over (+A mm) | 2nd over (+A mm) | 2nd over (+A mm) | |
3rd over (+.6 mm) | 3rd over (+.6 mm) | 3rd over (+.6 mm) | 3rd over (+.6 mm) | 3rd over (+.6 mm) | 3rd over (+.6 mm) |
1. Brand | IRZ | IRZ | IRZ | IRZ | IRZ | IRZ |
2. Type | Double Needle | Double Needle | Double Needle | Single Needle | Double Needle | Double Needle |
3. Venturi Diameter | 33 mm | 33 mm | 29 mm | 27 mm | 29 mm | 29 mm |
4. Mid-Range Main Jet Size | 76 | 96 | * 68 **75 | N/A | 80 | 82 |
5. Hi-Speed Main Jet Size | 115 | 108 | * 106 **105 | 110 | 90 | 100 |
6. Pilot Jet Size | 40 | 40 | * 40 **53 | 48 | 40 | 35 |
7. Slide | No. 4 | No. 4 | No. 4 | No. 5 | No. 4 | No. 6 |
*1971 Models
**1972 Models
Page 147