We attempt to do diesel performance modifications on our 411cc diesel go kart, but everything we look at on the engine has some kind of factory defect!
Just had a golden idea while staring at 670 predator on marketplace so I came here to give it to you guys.. build a recliner kart!!!! Find an old decent recliner (yes an actual living room furniture recliner) and mount it on a frame and just ride around in style at busco next year lol
Yanmar clone you can get parts a little hard to find but they are or look at garden tractor pulling sites or forms for the modifications that the pulling guys do.
Naturally asperated diesels are dogs. Due to the low vacuum of a running diesel its hard for them to suck enough air in for combustion (rolling coal) you can forget about any considerable power. Slap a small Ebay turbo on there, turn the fuel pump up and you'll see a considerable change in power and torque.
Seems like it could be pretty epic with lots taller gearing. The massive torque should make it move pretty good. The diesel stroke length probably isn't going to do a lot of revs in one piece, but I imagine 4500 rpm is reasonable.