But most of them are done on tuning link which throws up some odd numbers as the computer doesn't take in to account 'real world' changes such as wheel slip, chain wear etc, which will cause a spike in the graph and tuning-link will think its a fuelling problem and adjust the map to suit.
Tuning link was basically a tool to sell dyno's so 'anyone' could map a bike, the better operators dont use it.
If your waiting for a filter, most Dyno centres with a 250i will prob have a filter on the shelf or at worst next day, you could have it fitted when its mapped, doubt they'd charge to fit the filter.
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