Why does my bike go better on 98?

[lb99]

Yeah they do tingle a fair bit. Nothing more than a typical big four though. Make sure the engine mounts are tight.

Yeah, gonna check that, the missus gets it worse than me, sh reckons her foot buzzes right off the peg at over 100k. Im sure the rubber mounts will be as hard as hell by now

[riffer]

It is interesting the 91 vs 98 thing. My Aprilia Tuono (RIP) did about 20km more on a tank of 98 vs 91 and seemed to run a lot smoother.

As the bike was supposed to be fine on 91, I wonder if there's some additives in 98 that clean up the combustion chamber or fuel injectors a touch?

[caspernz]

It is interesting the 91 vs 98 thing. My Aprilia Tuono (RIP) did about 20km more on a tank of 98 vs 91 and seemed to run a lot smoother.

As the bike was supposed to be fine on 91, I wonder if there's some additives in 98 that clean up the combustion chamber or fuel injectors a touch?

The 98 supplied by BP had the effect of cleaning/degumming the fuel system, or so we'd been told. All I know is that the first year or so that we were hauling 98 the product had a strong solvent type smell to it, which might explain the degumming effect. Smells different now, so not sure if that means the cleaning effect is reduced.

My dad had a bit of a stumbling/gumming issue going on in an older European car, ran a couple of tankfuls of 98 and this seemed to cure it, so go figure.

[Dave-]

Confirmation bias is why it goes better.