Diasil Cylinder

DiASil Cylinder

Features of the technology
The DiASil Cylinder is an all-aluminum cylinder made possible by an exclusive Yamaha aluminum forging technology. Because it uses a 20% silicon aluminum alloy, it is possible to create a cylinder wall that is so hard and durable that it eliminates the need for a conventional steel cylinder sleeve. And, because the cylinder is all aluminum, it has excellent heat dissipation qualities and reduces engine weight at the same time. (Aluminum dissipates heat at 3.1 times the rate of steel.) The T135 is the first ASEAN market model and only the second Yamaha model of all to adopt this advanced technology, following the Japanese market model "Grand Majesty 250."

Effect (User Benefits)
(1) Maintenance-free - Because of the outstanding hardness of the DiASil cylinder wall, there is a substantial reduction in abrasion compared to a steel sleeve cylinder. (A reduction of 2 to 3 times according to Yamaha tests.) This eliminates the need for costly maintenance like sleeve replacement.
(2) Reduced oil consumption - Unlike a steel sleeve which is engraved with fine grooves to facilitate oil lubrication, the DiASil cylinder is given a surface treatment that helps maintain an ideal oil film on the cylinder wall and thus reduces oil consumption.
(3) Improved fuel economy - Because the cylinder, piston and surrounding parts are all made of aluminum, cooling is quick and efficient. This prevents heat-induced deterioration of engine performance and ensures ideal combustion efficiency.