Government plans had been made to gradually increase the
Kei car engine size limit to 550 cc, to make room for cleaner four-stroke engines and to reverse the slowing Kei car sales curve. Many manufacturers responded with interim, 500 cc models in 1976, Suzuki among them. In early June 1976 the
Fronte 7-S was presented, model code
SS10. "7-S" was meant to stand for
Space,
Safety,
Sense,
Save money,
Silent,
Stamina, and
Suzuki TC, not necessarily always in the same order. As per the new regulations, it was wider than the LC20 series and had a larger engine of 443 cc. Suzuki stated that this was the ideal displacement for a two-stroke engine, but gave the lie to that when they introduced a larger, 539 cc engine only sixteen months later. Wheelbase remained at , while overall length grew to thanks to new bigger bumpers and a somewhat bulkier rear end. The more squared-off front end also allowed for a larger front luggage area. The new Fronte was available with either two- or four-door bodywork with an opening rear window. Four-doors were significantly more popular, representing about 70 percent of production. The
T4A engine was still a three-cylinder two-stroke (simply a bored out version of the LC10), as Suzuki considered themselves experts at this configuration and deemed it ideal for kei cars. Suzuki emphasized the two-stroke's advantages: a simpler, more reliable construction of lighter weight, requiring less maintenance, and producing more power and significantly more torque than a four-stroke of equal displacement. Suzuki advertised the fact that the new Fronte 7-S remained a two-stroke with the slogan "It's Still Alive". The new Suzuki TC ("Two Catalyst") emissions system meant that it provisionally met the provisional, 1975 (50
年) emissions standards thanks to a
two-way catalyst and a secondary air supply device. In January 1977, the Fronte received some light alterations including a rectangular Suzuki badge in the front grille, taillights of a new construction, and a slightly remodelled engine lid with a somewhat wider recess for the license plate. The sheetmetal at the rear was also reworked and an additional heatshield installed at the rear apron, to avoid the hot exhaust system causing grass fires. This model is sometimes referred to as the SS10-2, to tell it apart from the pre-facelift model. Suzuki's struggle to meet the 1976 emissions regulations with the two-stroke engine compelled them to write a contract with Toyota to purchase engines from their subsidiary
Daihatsu, Suzuki's main competitor. The agreement was limited to a maximum of 1,000 engines per month. with the two-stroke at a slightly higher (by ¥18,000) price. Because of the limited numbers available, four-stroke Frontes were initially only available in the all-important Tokyo market. Torque was at 3500 rpm, versus in the smaller two-stroke engine. In the end, Suzuki did manage to meet the regulations with their own engine. The new
SS12 Fronte 7-S going on sale on 25 May 1977, becoming the first two-stroke to meet the tighter 1978 (53年) emissions standards. The interim SS12 was replaced by the "full scale" 550 cc
SS20 version presented on 27 October 1977, with a slight facelift consisting of a new grille, redesigned cladding around the C-pillars, and a new dashboard. The SS20 is equipped with the
T5A engine (first seen in the
Jimny); with 539 cc it offered at 5000 rpm and at 3000 rpm, which helped bring top speed back up from . To use up leftover four-stroke engines, the SS11 received the same facelift as the SS20, becoming the
SS11-2. The SS11-2 was fairly short-lived, though, as the new T5A engine met the emissions regulations on its own and Suzuki was now able to terminate their contract with Toyota. The torque gap between the four- and the two-stroke models was widened further: while the SS11 could climb a
slope of 0.34 tanα (18.8˚) the SS20 could manage 0.52 tanα (27.5˚). The production run of the SS20 was not very long either, coming to an end after just over a year and a half. Production ended in April 1979, as Suzuki was getting ready to introduce their new generation of front-wheel drive kei cars. In the few export markets where it was available, the Fronte 7‑S was simply sold as the "Suzuki SS10" and "SS20", foregoing the Fronte name. It was also built with left-hand-drive, for export, but also for the Okinawan market where traffic drove on the opposite side of the road until
the end of July 1978. The SS10 received an engine less burdened by emissions equipment than the Japanese market model, producing at 4500 rpm. It was available as the two-door FC (Custom) and the four-door GL (Deluxe). == Fronte fifth generation (SS30/SS40)==