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We plan to reopen the webstore later in 2021.
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This engine and pipe combo has been designed according to Adam Drake's advice and taste. This engine also comes pre run-in on a heated oil bath run-in machine.
This new edition comes with a new design cylinder liner with new porting and a new design crankshaft with double tungsten counter weight. The new bore x stroke is designed with Adam Drakes's requirements in mind. This OS engine includes some carburetor reducers (6.5mm and 8.0mm) to suit both powerful drive and fuel economy drive OS SPEED 5. P3 GOLD plug is used for more consistent idling.
- Designed according to Adam Drake's advice and taste.
- New design cylinder liner with new porting
- New design crankshaft with double tungsten counter weight
- New bore x stroke (see the attached specifications)
- Carburetor reducers are 6.5mm and 8.0mm to suit both powerful drive and fuel economy drive OS SPEED 5. P3 GOLD plug is used for more consistent idling.
