Oversquare is an old fashioned precept that simply doesnt work.
Its all to do with the way you have to go about generating port area , and on the other side of that coin is the percieved idea that you can rev a short stroker harder due to lower piston speed.
But all physics aside , look at what history tells us.
In GP racing Yamaha steadfastly stuck to 56x 50.6 and were never even close to winning 125 or 250 titles untill they finally ditched corporate pride and went square in 2000.
That year they blitzed 250GP with Jaques and Nakano.
Due to the port timing limitations , the short stroke 4DP series TZ could never rev harder than the 54 square Honda or Aprilia - as the theory says it should.
There is a completely differing set of reasons for 250MX singles to be very undersquare at 72 stroke - where outright power isnt the issue, its a flat torque curve from low rpm.
But then look at the power results gained by Honda with its RS500V that was 68 x 68.8 square.
The worst example of oversquare idiocy would have to be" the great leaders " V twin GP500 Aprilia.
Its only claim to fame being McWilliams pole at Philip Island , and that was the rider on that day , not the engines power as was predicted ( never actually seen in reality ).
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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