Acha yeh scene hota. my mehru at cold start was giving blue smoke (So i thought it has valve seals issue or rings issue). the oil was 20/50 mineral oil, this time i got 10/40 synthetic oil in her, and smoke etc at cold smoke is gone now. it gives only kinda grey smoke sometimes but with 2 or 3 revs it get vanished. And before that i have to rev for 6 to 8 times to get that blue smoke finished. And if i start now at early morning it gives this grey smoke at cold start but if i start her first cold start never aftrnoon time. No smoke. ANd got no idea of this miracle lol 