Re: More difference in SPL motors than just VRO?
To my knowledge, the SPL engines were pre-60 degree looper vintage in most cases although the SPL's that were available after the 60 degree engines came out (in the V-series) happen to be all crossflows.
There was never anything clear on what the SPL was for sure..I've heard many rumors, yet on the new '97 115SPL I bought, it had all of the tricks any of the others had...PTNT, Cowl TNT, 9amp charge (typical of the 90 degree crossflow).
Can't say that the factory has anything, at that time, that indicated any difference...but, as I've said, some say they were cheaper models of which I disagree...Mine had everything the std 115 in the crossflow had.