This motorbike is an actual relique , the last version made from yamaha was a 2006 model until the distribuition stops , at least it happens here in Colombia.
The bike is normally used in " Piques " wich are informal races made in determined places and hours , it is frecuently used because of it's power of accelaration and speed given by the two stroke machine , Rx 115 are also improved by the owners with new and diferent parts that help developing a better performance when doing a race.

Their not just used for " piques " their also used for doing stunts as the bike weight is light.

Yamaha Energy Induction

Yamaha rx 115 is a two strike bike , what means that for each revolution of crank we can get power.
2 Stroke machines are more efficient than a 4 stroke engine.

When the piston is at the top of cylinder and the spark plug ignites the compressed fuel, the piston moves backward due to expansion of ignited fuel and it is called the power stroke.




The mechanical characteristics are :

BORE & STROKE 54 X 50 MM
COMPRESSION RATIO 6.6:1
MAX POWER 15.5 ps @ 8500 rpm
MAX TORQUE 1.35 kg.m @ 8000 rpm
RPM 12X1000

It has air intaker under the fuel tank which pumps the fuel in the cylender block through carburator.
the clyender has ports and alos piston has two ports in it for the cerculation of the fuel.