– Yamato 331 Race Engine –

Introduced in the race stadiums in December 2014

model 331.jpg
331 cylinder head.jpg

Model 321

Model 331

331 exhaust.jpg

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

C L I C K  T O  D O W N L O A D

332 Magneto.jpg

In 2017 a new Transister Ignition / Flywheel upgrade was introduced.  This produces a stronger and more reliable spark.

New Flywheel.jpg

The 331 Flywheel (now painted black) must be used with the new style Transister Ignition.