RE: Are the new Thunder Tiger 40s actually 46s?
Imeasured the new engine at the hobby shop that was mentioned in the first post. The bore is 21.8 mm and the stroke is 20.0 mm. According to TT specs, this is a 46. Ichecked both of my 40's that I bought at the same shop last year and they measured as 40's, The picture is the engine in the shop.