Most of underbone riders in Malaysia are excited to know that HLYM has introduced the 2011 Yamaha 135LC Extreme Spirit with 5-speed. The features fitted to it are way beyond the ‘normal’ criteria of an underbone bike for it class. The brakes are upgraded to fully disc brake setup with the front equipped with 297mm disc plate with 2-piston caliper and the rear with 190mm disc plate with 1-piston Nissin caliper. At first, I thought the rear brake caliper is the same model with the Y125Z rear brake caliper which is 2-piston equipped. In Thailand, the another version of Y135LC ES that is the X1R has been equipped with rear disc brake setup long time ago and has been followed by 135LC riders here to have their bike equipped with rear disc brake too. What the fuss actually about fitting the rear disc brake? It is about three thing;