Pre-Unit A Group

For timing gears, pinion etc. please click here; for main bearings click here; for alternators and fittings click here.

Pressed up crank assemblies. Most single cylinder engines have a built up crankshaft, which means that the big end, flywheels and mainshafts are separate components that are pressed together and retained by nuts or rivets. Wear takes place in the big end assembly, evidenced by up and down play, which should not be confused with side play. A fair amount of side play is acceptable, however figures for it are hard to come by and it is also expensive to cure. The only other problem likely to be encountered is worn shafts where the bearings run; they should be a light drive fit. Shafts can be reclaimed by industrial hard chromium plating and grinding to size. In order to replace any of these parts correctly, special equipment and skills are required all of which is available at Draganfly. Make sure that the oil ways are clean before assembly!