Yeh, that's a good old ad.
If you've never ridden a Mach III you haven't lived - man they are scary, evil, noisy, dirty, smokey, wobbly - but fark they are a heap of fun.
I'll never forget a mate loaning me his back in the 70s "here, take it for a spin, no probs". Thirty minutes later I returned shaky, sweaty, wobbly, with a grin from ear to ear and said "how good was that, but I don't need to do it again". The 750 Mach IVs weren't much different, but a bit better handling. And they both are very collectable and I'd love to have either in my garage (along with about 20 other 70's classics of course!).
And Terry, the GT750s were laughed at in the 70s, but we all now realize they were a damn good bike, and also very desirable these days.
Oh bugga, now I'm dreamin again..........