Sunday, 6 February 2022

Yamaha YZF R125 performance tuning modifications

A post collecting information on popular modifications to the Yamaha YZF R125 may do a post on each time and money allowing. Im not a big fan of wasting lots of money for little return but your opinion may differ.



Yamaha YZF R125 performance tuning modifications



Yamaha YZF R125 EGR delete 

EGR system is fitted to reduce emmision by circling exhaust gases into you inlet system to reduce temperature of the combustion chamber. Obviously this is going to have an effect of the combustion and the power. 


Yamaha YZF R125 air valve mod

The air valve is a reed valve when the exhaust go negative it sucks in air from the air valve and this helps burn off  any unburned gases.


Yamaha YZF R125 Air box mod

Theory here is more air in more, more air available for combustion , more exhaust out and more power, 


Yamaha YZF R125 Air filter ( sports )

Same as sbove less restriction for air equal  more air for engine and in theory more power.


Yamaha YZF R125 Sports exhaust

As above the moving air through the engine more efficiently adding more power , and noise. although an exhaust baffle has been shown to improve things on sports exhausts.


Yamaha YZF R125 Sprockets

Increase top or bottom end by adjusting sizing of sprockets. 



Yamaha YZF R125 Power commander ~ O2 sensor 

Finer control of fuel injection and custom fuel maps more fuel at the correct time equals more power.


Yamaha YZF R125 Big bore kit and Injector upgrade 

Increase bore size more power, increase injector size more fuel, therer are different size injectors for differing bore size increases. 


Yamaha  YZF R125 after market shock ( adjustable ) 

Increase handling and steering buy adjusting you suspension to suit your riding style 




No comments:

Post a Comment