Racing Cylinder MALOSSI 289 cc

for YAMAHA 250 City i.e./
-Max i.e.
YAMAHA 250cc 4-stroke LC i.e.
aluminium

74,0mm
stroke 73mm
3 piston ring(s)
pin 17mm

TUNING SPORT – high-performance

For race use only. Not admitted in the area of the German StVZO!
This item can not be delivered to the country of your choice. Product description
The new complete cylinder equipped with CDI for Yamaha 250 4-stroke LC engines was born!
Force Master is the innovative CDI which allows to change the injection in order to fit perfectly the new Malossi 4-stroke cylinder kit.
This CDI has been scheduled with 3 different maps so as to be coupled perfectly with your vehicle whatever its setting is!
TECHNICAL FEATURES
Cylinder
Bore:
74 mm; Stroke: 66.8 mm; Displacement: 287.29 cc; Compression ratio: 1:11
Material: primary aluminium alloy with a high content of hardened and tempered silicon, cylinder liner with silicon carbide coating in a galvanic nickel die and crossed smoothing with two diamond passages with very limited tolerances
Machining: on machine tools with high precision numerical control
Cylinder-piston connection with an allowance of 0.05 mm
Recalculated and upgraded heat exchange surfaces
Piston
Ultra compact with 3 rings
Material: special aluminium alloy with high silicon content, low thermal expansion and a tin facing on the sliding surfaces
Machining on machine tools with numerical control
Lightened and reinforced
Upgraded heat exchange surfaces
Piston rings
Special rings with high sliding ease and very high mechanical resistance
I
ring compression in nitrided and chromium steel
II
special cast iron ring
Three – piece scraper ring made of chromium-plated special steel alloy
CDI
Carburation adjusting

20% at min/medium/max
3 different maps

OEM numbers (for comparisons):
3114268 (MALOSSI)