Loncin GX390 Engine
Degoverned & Low Oil Sensor Removed,
Billet 4.510'' +.100'' Conrod,
Lightweight Flat Top Piston,
0'' Deck Height,
.307 Race Camshaft,
Aluminium Top Plate & Fuel Pump,
Fire Ring Head Gasket,
ARC Lightweight Flywheel,
6* Advanced Timing Key,
Skimmed, Race Ported, Diamond Cut Seats, Big Valve Cylinder Head,
Stainless Steel Valve Train Kit,
34mm Flatslide Mikuni Carburetor Kit,
Roberston Race Exhaust,


Fast, reliable 40HP engine. Max RPM's 7500-8000

*This spec engine is built to order and due to COVID related supplier issues on some parts delivery times will be longer than usual. Please contact us for availability and delivery times*