Hello Axial....I have a friend on another forum. He just recently purchased a truggy used that came with an Axial green head engine. He wants to know if there's any way to tell which ( .28 or.32 ) engine it is. Is there any way he can find out? I have the .32 in my MGT and there's no markings of any kind on the case. There are #s on the carb body though... K90B. He tells me his says the same. I tried looking on your website, thinking that those #s might be part #s, but both engines use the same part # AX020 for the carb. Any help is appreciated. Thx