Vortex VTJ OK Junior Engine (CIK-FIA)

Description

Vortex VTJ — 125cc single-cylinder reed-valve two-stroke, liquid-cooled with external pump. CIK-FIA homologated (012-EJ-29) for the OK Junior class, the Junior category of direct-drive karts established by FIA Karting. Successor of the DTJ, winner of two world championships in 2020-21-22: compact dimensions, low centre of gravity, lightness, ease of use and reliability, with optimised cast-and-machined crankcases and paired crankcase boring.

Technical specifications

• 125cc
• Bore x stroke 54×54 mm (square)
• Roller main bearings
• Cylinder with fully machined cast-iron dry liner
• 5/3 cylinder/crankcase transfers
• Crankcase reed-valve intake
• Fully machined intake section
• Connecting rod 102 mm
• Selettra ignition CIK-FIA homologated 034-IG-20
• Max 14
• 000 rpm (rev limiter).

Supplied with

• Roller bearings
• Selettra ignition and coil
• Spark plug and cap

Exhaust, carburettor and engine mount not supplied.