why is there a blast sound in my motorcycle?

Question

while driving it makes a blast sound but nothing goes wrong and i can continue

Answer 1

Interesting description, but it does sound like a backfire which is caused by a couple of different things. One, the spark is too far advanced which probably won't happen on a modern bike with computerized ignition. Most probably it's your mixture. From the way you word your question, it's my guess that you're not that familiar with mechanical work so if I were you, I'd take it to a mechanic.

That said however, I own a few Harleys and have owned several; they ALL backfire at different times and the simple truth is that there's nothing wrong, that's just what they do sometimes. It cleans out any residue if nothing else, and it's not harmful. If yours only does it every now and again, I wouldn't worry about it. If it bothers you though, take it to the shop and have it looked at by your mechanic.

Answer 2

sounds like a backfire, it needs a tune up

Answer 3

Check your valve clearances.