Struggle to Kickstart if Engine is Cold

by Greta
(South Africa)

My bike is a Suzuki ts 185, a 1996 model. I serviced it recently, have a new spark-plug, it idle beautifully, run well, but STRUGGLE to start for the first time per day. If engine is warm it starts with the first kick. Once it starts I have no problem.

I thought if I service the bike and replace the spark-plug the problem will disappear, but not the case. Please help.