IModel in France hand tuned version of the GO B21.5P buggy motor. This 3.5cc 5 port
engine features work done to the main components of the engine that increase
performance and longevity. The crankshaft has been lightened while there has
been work done to the crank bell, which has been polished and lightened for
better acceleration. The liner has also received some attention with the ports
getting the teardrop treatment, while for more tuning possibilities the engine
is supplied with 4 different venturies.