You have read the title right. Yamaha 135LC Extreme Spirit with 5-speed are able to be converted to 6-speed with minimal modification to the engine. This is due to the fact that the engine shared a lot of the component from its brother with 6-speed like the YZF-R15, FZ150i and Byson(Indonesia). Modifmania.com, an Indonesia-based blog has revealed the modification for all us to see and many thanks to them for sharing the valuable information.
I think this the beginning of 135LC 5-speed extreme modification. More and more modification will come out and that just means more fun will come through. Check out for more info after the jump