19/30 but I don't know the compression numbers and ratios it ask off hand, but I know what it means and the stupid where is the oil introduced questions where wrong in my opinion, it depends on modle.
Disappointed in my 26/30. The personalities questions got me as well as the one where oil "originates" in the carburetor.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
It could have been more specific with the questions, small engine seemed to be refering to the kind found in leaf blowers.
Compression options a bit random and didn't really fit any, my 50cc 2T Simson Schwalbe runs at 9:1 compression, which is the same as my 4 stroke Honda 175cc.
1983 Melody Deluxe II / ND50MC
1984 Melody Mini / NP50D
1979 Simson Schwalbe KR51/1 (think 2 wheel trabant/ East German Honda Cub)