With a modern fuel injector system, instead of just changing to a larger carburetor, you need to change your fuel injector, throttle body and do a ECU tune up upgrade which may be a very costly modification. To prevent your wallet getting too light, you can try out these generic brand fuel injectors. Cheap but functional, useful for any bore up cylinder block kit.
Rated for 240cc/min output, can support up to 40hp at 90% output.
***This injector suits older model yamaha motors, years 2008-14 but may be different in other countries. Please check which version your bike uses first before buying!**
Yamaha Y15ZR/Jupiter MX King/Spark/Exciter/Sniper MXi/ T150