![]() A 6A alternator is optional, but as it doesn't have voltage regulation only a car battery should be used to prevent frying it on longer runs. ![]() ![]() The gear ratio is 2.09:1 and the manual longshaft model weighs 57.5kg, with electric start adding 4kg. The single carbie is easy to maintain and there's a simple mechanical ignition timing advance. At 499cc the twin-cylinder DT30 still has the largest displacement of any carbie two-stroke 30 and while it doesn't develop any more power than the competition, it produces way more torque.ĭeveloping 29.6hp at 5300rpm with a Wide Open Throttle rev range of 5000-5600rpm it's an under-stressed unit, while its main and auxiliary cooling water intakes ensure the powerhead is never likely to suffer from water starvation. ![]() This is why at higher revs most loop-charged engines outperform their cross-flow counterparts. By using slightly domed pistons instead of those with a ridged top (as found in cross-flow engines) the pistons can be made lighter, reducing the flywheel size and the power needed to drive it.
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