– Yamato Model 331 Race Engine –
Introduced in the race stadiums in December 2014
The diameter of the Exhuast Pipe is reduced
Model 321 Model 331
Thickness of the Cylinder Head is increased by 0.5
C L I C K T O D O W N L O A D
The 331 comes with a Transister Ignition & Flywheel
upgrade which produces a stronger and more reliable spark.
The 331 Flywheel (now painted black) is required with the new style Transister Ignition.