DAP T80 - Twin Carb

The engines were originaly brought into Australia by Brian Hunter who picked them up from the Hegar factory and raced them on a twin factory Bug setup at various meetings in the US before returning home. The engines are believed to be the ones that appear in the photos of Brian Hunter on the VHKA site http://www.vintagekart.4t.com/twins.html.

The engines have extensive internal modifications and porting and have the distinctive hegar logo milled into the heads. John Humphries aquired them some time in the 1980's and rebuilt them with some good rods etc from Peter Dell along with Yamaha pistons. The extra carb was fitted by using a KX 80 reed valve and a custom made reed block fitted to the flat area where the fuel pump for a delorto carb would be mounted. The crankases and reed blocks took many hours on the mill but better than watching tv. John modified four carbies for methanol and fitted the engines to a Swiss Hutless twin frame but could not get it to grip in the front so discarded it in favour of the X8. The set up was only used on a few ocasions including the Devonport street race in around 1990 and produced a huge power surge in the mid range that outpowered later model motors--Rotax etc -- the left hand engine distroyed itself when the rotary valve gasket broke and blocked off the pulse hole to the carby and leaned out.

John now has enough parts to rebuild the broken engine although he believes that they will need two fairly fit pushes to get going so the T90's with clutches seem to be a more user friendly option at the miniute. He hope that the motors will be his next project when he finishes the X8 twin and the HKS/Mac