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– Yamato 331 Race Engine –

Introduced in the race stadiums in December 2014

model 331.jpg
331 cylinder head.jpg

Model 321

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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

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 - painted black - MUST be used with the new style Transister Ignition.

331 Production Changes.jpg

Model 302-331 Production Changes

Cylinder Head

302

331

Intake Manifold

245mm

285mm

Air

Funnel

221mm

275mm

Waterproof

Cover

14mm

18mm

195

191  

Drive Shaft

Housing

Yamato in Japanese copy.png
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