My CBR lastly started to loose almost all the power and making explosive sounds like ''PA'' ''PA'', I have to say that the second gear is broken so I was forcing the third gear, I want to know what it could be for to check it out and fix it. Thanks, any answer that could help please

 

As for engine making noise that could be timing wghich mean valves or shims need checking

 

That sounds bad. Next it will be making you reach for your wallet and crying MA MA.