Got a moki 1.8 today and the compression is higher than my 10 year old St3000. I ran it, but it didn't turn any scary rpm's over the ST as I was told. I'll do a direct comparison soon. I don't expect I'll see a significant difference. My ST runs a perry pump and a OS 7D carb. I paid $50 for it last year and based on some opinions I guess, it kicks @$$ for ST.