Hello all.... whats the difference between the older design OS pre-surpass engines and
the more modern surpass engines? I have an older pre-surpass 120 4 stroke that I aquired and had it totally rebuilt- new bearings, ring etc... and was wondering whats the power difference from the newer engines of today? I plan on putting the pre surpass 120 on a GSP
hellcat and was just wondering on the performance I might expect?
Thanks in advance!!! John