IAME KZ Screamer IV Engine for Professional Gearbox Kart Racing
The IAME KZ Screamer IV Engine represents the latest evolution in high-performance gearbox kart engines. Developed for the demanding KZ and KZ2 racing categories, this powerful 125cc engine was launched in 2023 as a completely redesigned racing platform built using experience gained from international championship competition.
Featuring a newly engineered crankcase that is lighter and more compact than previous generations, the engine delivers improved chassis balance, enhanced reliability, and optimized performance. The innovative cylinder design incorporates race department technology and refined port architecture, resulting in stronger acceleration, improved throttle response, and higher overall efficiency on track.
Designed for elite drivers and serious racing teams, this gearbox engine delivers more than 40 horsepower combined with a precise six-speed transmission system. The result is explosive performance out of corners, exceptional top speed, and full control over power delivery in technical circuits such as Al Forsan, Dubai Kartdrome, and Yas Kartzone.
Water cooling ensures stable operating temperatures even in the extreme UAE climate, while the reed valve intake system provides smooth power delivery and efficient fuel mixture flow. The analog ignition system offers race-proven simplicity and reliability, making this engine a strong choice for competitive drivers seeking consistent performance throughout long race weekends.
This engine is CIK homologated and built to compete at the highest level of kart racing, making it suitable for national championships, international events and professional driver development programs.
What is Included with the IAME KZ Screamer IV Engine Package
The complete engine package includes the essential racing components required for installation and competitive use.
Included components:
• IAME Screamer IV engine unit
• Dell’Orto VHSH 30 carburetor
• Six speed gearbox assembly
• Intake system with reed valve
• Ignition system components
• Water pump system
• Exhaust manifold
• Engine mounting hardware
• Basic setup fittings
Technical Specifications of the IAME KZ Screamer IV Engine
• Model: Screamer IV – KZ / KZ2
• Engine Type: Single cylinder, 2 stroke
• Category: 125cc Gearbox
• Bore: 54.00 mm
• Maximum Bore: 54.08 mm
• Stroke: 54.40 mm
• Displacement: 124.59 cc
• Ports: 5
• Inlet System: Reed valve
• Lubrication: Oil mixture
• Ignition System: Analog
• Transmission: 6-speed gearbox
• Cooling System: Water
• Starter: Push start
• Carburetor: Dell’Orto VHSH 30
• Power Output: Over 40 hp
Professional Support and Racing Development
XELAR Motorsport provides full technical support for drivers purchasing this gearbox kart engine, including setup guidance, trackside support options, and race preparation services. This ensures drivers can maximize performance and reliability while competing in demanding KZ racing environments.
Explore our karting programs and race support services through XELAR Motorsport.
Drivers interested in testing can book a session through our kart testing program
All karting safety equipment must comply with FIA homologation standards.
