If over the years no one noticed, running electronic fuel injection allows manufacturers to increase compression ratios, thereby getting more horse power. In the very old days (Just before they began to significantly increase cubic inches.) when the fuel wasn't unleaded corn water, horse power added up to three things: compression, carburetor and cam. Since electronic fuel injection (and the related sensors) allows for very precise spark and fuel control (much better than any carburetor with a distributor), the manufacturer's were able to increase compression significantly as well as using much more radical cam ratios (Can't remember if ratios is the right word.).
If Suzuki is using fuel injection, it is entirely within reason they can get significantly increased horsepower out of the same displacement motor. After all, Ford and Chevrolet are now manufacturing V-8 engines displacing significantly less than the very under powered 1980's 350 and 351 cubic inch engines. These little engines are producing over 200 horsepower and getting 20 miles to the gallon average (like the little 4.3L in my 2004 red Ford F150 truck).
That Tahatsu has been able to solve how to get fuel injection into the small cubic inch engines is a great thing for all of us. Let's hope the rest of the companies follow suit. Soon we'll have 4 cycle engines as light or lighter than the 2 cycles of the past with more horsepower and nobody will be missing the "good ole days."
For my own part, I'm so glad to see the junk vehicles I had to deal with in the eighties gone I just can't say. Underpowered, troublesome and lasted at most 100K miles or so, many of them, in spite of good maintenance. Nothing like the Ford Trucks I have now, 120K and running like new cars.
