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Spark plug looks blackish in my newly bought Hero motocorp HF Dawn 100CC?
I am in need help, i don't know if this is normal or not, I have bought a Hero HF Dawn a month back, pretty awesome bike and love every bit about it. I just did the first service which is 500KM, then when i bought the bike back home i checked the spark plug since i noticed it does around 50KM per litre, pretty good enough for me but it suppose to do better on fuel than above, the spark plug looks sooty and blackish that means it is getting more fuel than it needs, so i cleaned up the carburetor, tuned it up, now the idle screw is three quarters, not even a full round, but still spark plugs doesn't look good. What may have caused this?, i checked the choke etc, everything seems pretty fine. Is it because the engine is still new?
* I checked the air filter
* New Hero Moto engine oil added
* Stock spark plug NGK CR7HSA
* I checked the air filter
* New Hero Moto engine oil added
* Stock spark plug NGK CR7HSA
