I have the same problems. After a few miles on my bike on a hot day, I
Perhaps if you describe the smell, that would help.
However, unless you have a check engine light on (assuming that your
light works), it is unlikely to be the cat.
Which 3 litre engine is it? There is a Duratec engine and the Vulcan
engine. Both were 3 litres. The Duratec engine has 24 valves and the
Vulcan has 12 valves.
If the problem that caused it to conk out were the cat, I would expect
that it were blocked up. A blocked up cat will also cause the engine
to overheat, because the hot gases don't leave the engine fast enough.
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