You can try to give the engine a bit more fuel, an engine at the lean side performance is better but also harder to start. So make the air-mixture a bit richer and you probably can start the engine much easier. Finding the perfect fuel-mixture is often the biggest trick of tuning a engine.
My motorcycle type is Yamaha 115Zcc after the modification be made it is hard to start specially earlier in the morning whats the problem to be solve and how to settle it? For information my motorcycle is only use start kick. I m from Selangor, Malaysia.Thank you