Primary transmission gear 39D Yamaha X-Max 250/300 TDR

The TDR primary gear, manufactured with the best material and through a computerized process, produces precise gears to achieve maximum power and acceleration for travel or daily use.

39 Teeth (-5.13%) version without holes

Its installation is quite simple. You just have to drain the used transmission oil, remove the engine covers and then the transmission cover, carefully remove the primary gear (the large gear furthest to the right) and install the new TDR gear. Next, you should carefully close everything and use 75W-90 200ml transmission oil.