Just get a rubber hammer and start banging around on the exhaust... It's probably the hanger... The spring has a tendency to rattle... You'll get quite the buzz around 4500RPM.. That means, Let's go faster... Buzz goes away shortly thereafter and this is when it will start pulling hard....All the way up to the rev limiter... The real power is above the buzz...
They all do it....Really they do....
John
They all do it....Really they do....
John