bottom of the crank chambers. This was first seen on the Suzuki GT750, GT550, and GT380 motorcycles. In an effort to reduce CO, HC, and NOx emissions, the EPIC (Exhaust Port Ignition Cleaner) system was also installed. Applications: 1971.05–1973.07 Suzuki Fronte LC10 W 1971.09–1976 Suzuki Fronte Coupé 1973–1976.05 Suzuki Fronte LC20 LC50 A bored-out version of the air-cooled LC10, called the LC50 in reference to its near half-litre displacement (actually ) appeared in January 1969. In street applications, this engine was only for export, and was only ever made with air cooling. Like its smaller brethren, the LC50 breathed through triple carburettors. Water-cooled triples were built for racing purposes, producing at 9,000 rpm. These took part in the JAF Grand Prix Formula Junior class as well as "MR" (Minicar Racing) meets. Thus equipped, the Can-Am style Fronte RF with Mitsuo Itoh at the helm took the victory at the 1970 "Junior Seven Challenge Cup" race, held at Fuji International Speedway, with an average speed of . 1969.01–1970 Suzuki Fronte 500 1970–1973.07 Suzuki Fronte 500/LC50 ("Sting Ray") T4A In response to the changed Kei car regulations taking effect on January 1, 1976, Suzuki developed a bored out and cleaner version of the LC10W, featuring Suzuki TC (Twin Catalyst, a double muffler in which uncombusted fuel was burned) emissions equipment. The watercooled engine's bore was , while retaining the stroke. Sometime between 1973 and 1976 Suzuki had changed their system of naming engines, so this engine became the T4A. This meant that it was the first ("A") engine with a 0.4-litre displacement. The T4A was fairly short-lived (only used in the Fronte 7-S for a little over two years), and was soon replaced by an unrelated "full size" (550 cc) engine called the T5A/T5B. The emissions strangled T4A put out at 4,500 rpm in its final "TC53" form: specific power was 54% of what a 1972 Fronte GT had managed. 1976.05–1977.10 Suzuki Fronte 7-S SS10/SS12 See also List of Suzuki engines References LC10 Two-stroke gasoline engines Straight-three engines Gasoline engines by model