SAAB hops and a Impish noise ?

Early SAAB run to collect and then drop back the Harkstead Brazill and an electric friend.

Evening was ripe for a run in the Imp in the late sunshine.

It was going well but about seven miles of the circuit it sounded as if the exhaust was making more noise than usual and perhaps felt a little under power ? Was also a little more clutch slip once - perhaps that's the problem. Or have I just imagined everything. We'll see.