MXZ / Legend / Summit / Grand Touring / Formula
Got a 1997 Ski Doo Formula 380F(62mm x 61mm) coming. I want to Big Bore it to a 76mm x 61mm, a 550F(553cc). The 380F, and 550F use the same 120mm Rods, and same 61mm stroke. I'm probably going to go with 76mm LA Sleeves.
Has anyone done this before?
Does anyone know the Factory HP rating, at...