When the racing is generally pretty close all meeting long.. then suddenly, previously ineffective riders are winning races by 50-60 yards against WORLD CLASS riders, all grouped tightly behind them, something is amiss.
Within the rules, or not within the rules, we will never know as it is not, despite what some say here, properly investigated. The sport has too much lose for that.
Unfortunately speedway is becoming ever more like Formula One where on the big tracks its a case of fastest bike wins more often than not.
It makes me laugh when people rave about what a talented rider Gollob is, comparing him to some of the best of all time. He is nowhere near some of the great riders of the past. What he does have are the fastest bikes.
We will never know, the pressure would have been completely different.