| It depends on where you are in the running in process as to whether you need to worry about tappets.
The hummer is a bit noisy in this department during the run-in - however as I said in a previous thread, it's a mechanic's bike that needs adjusting now and then.
If you're still running in - then expect a little noise. If you've already run the bike in - then maybe it's time to check the gaps.
It's not a bad idea to check tolerances on a regular basis anyway - develops good habits and helps you get to know the bike. |