Malossi Sport Cylinder Kit 182.58 ccm (63 mm) – Big Bore Upgrade for Yamaha 125s

With the Malossi Sport Cylinder Kit, you get a real big-bore upgrade for your 4-stroke: thanks to a 63 mm bore, you reach a real 182.58 ccm displacement. The cylinder is manufactured in aluminum construction and delivered with a hard-chrome plated cylinder bore – ideal for robust, long-lasting performance in everyday use and on the track.

According to the manufacturer, the cylinder can be run with the original cylinder head. However, due to the higher compression ratio with the stock head, you should only fuel with premium gasoline or higher. This makes the kit a very solid, powerful solution for all 4-stroke fans – Made in Europe.

Important: If the cylinder is used in vehicles with direct injection, you will need the appropriate Malossi Force Master 2 ECU unit to adjust the injection quantity and avoid long-term engine damage.

Advantages & Features

• Big Bore: 63 mm bore for 182.58 ccm displacement
• Aluminum cylinder for good heat dissipation
• Hard-chrome plated bore for high durability
• Stock cylinder head usable (manufacturer specification)
• With stock head: premium gasoline or higher recommended
• For direct injection: Force Master 2 required for correct mixture adjustment
• Proven Malossi Sport quality, Made in Europe

Technical Details

• Bore: 63 mm
• Displacement: 182.58 ccm
• Material: Aluminum
• Cylinder bore: hard-chrome plated
• OEM No. (for comparison purposes): 3114852

Note on Direct Injection: required Malossi injection modules

The following injection modules are offered by Malossi (Force Master 2):

• M5514233 (Yamaha WR R-X 125ie 4T LC Euro 3 (E3D9E), YZF-R 125ie 4T LC Euro 3 -2013)
• M5514234 (MBK Cityliner 125ie 4T LC euro 3, Skycruiser 125ie 4T LC euro 3, Yamaha X-City 125ie 4T LC euro 3 (E3A5E), X-Max 125ie 4T LC euro 3 -2008, X-Max 125ie 4T LC Euro 3 2014-, X-Max 125ie 4T LC Euro 3 2009-2013)
• M5514850 (Yamaha 135ie 4T LC 2011- (T135), Crypton X 135ie 4T 4V LC 2011- (T135), Exciter 135ie 4T LC 2011- (T135), Jupiter MX 135ie 4T LC 2011- (T135), Sniper 135ie 4T LC 2011- (T135), Spark 135ie 4T LC 2011- (T135))
• M5516731B (Yamaha MT- 125ie 4T LC (E3J4E), YZF-R 125ie 4T LC euro 3 2014-)

Compatibility / Vehicles

The Malossi Sport Cylinder Kit fits many 125 models – including Yamaha YZF-R 125, Yamaha WR 125 as well as Yamaha X-Max 125 (depending on production year/variant) and other models from Beta, Fantic, HM, Husqvarna, Hyosung, MBK, Motorhispania and Rieju.

Especially for popular platforms such as Yamaha YZF-R 125, Yamaha WR 125 and Yamaha X-Max 125, the kit is a strong basis if you want more displacement and a noticeably more powerful characteristic – for fuel-injected models, be sure to use the appropriate Force Master 2 tuning.

Why Malossi?

Malossi has stood for years for well-thought-out, performance-oriented components with high manufacturing quality. With the Sport Cylinder Kit, you get a clean choice of materials, a resistant bore, and a solution designed for reliable performance – Made in Europe.