While the original design may be all too conservative, squeezing almost the double power out of the same engine block is imho itching for trouble.
Also: who says this is a microlight engine? My 450 kg craft is (slightly) overpowered with the stock 80 HP Rotax, 154 genuine real hp would be total overkill. OTOH in a 4-seater it might come in useful.
Last edited by Jan Olieslagers; 9th May 2017 at 19:48.