Your question is unintelligible.
The only motors I know of that you start by a spring are old lawnmowers and the Honda Express (which is a moped not a minibike). The only way they don't start is if the spark plug needs replacing or they're out of gas or there's a fuel blockage.
It doesn't take any time to turn your bike on. It's either got a kill switch or a key. It's either on or off. Presumably you mean it takes 15 minutes to START, in which case the bike shop has either stuffed something up, or they fixed it to how it should be and you are still using your old starting technique - which now won't work. Did the bike shop actually test that it ran when they gave it back to you?
By the way, the THROTTLE is for going fast or slow, not the clutch.