Yamaha DT1 250 Motorcycle - Dual-Sport (1968-1971)

The Yamaha DT1 250, produced from 1968 to 1971, was a groundbreaking dual-sport motorcycle, establishing a new market for off-road capable bikes that could also be ridden on the street. It featured a 246cc (often rounded to 250cc) two-stroke, single-cylinder, air-cooled engine with Yamaha's Autolube oil injection system, eliminating the need for fuel pre-mixing. This engine remained consistent throughout these model years. While the core 246cc engine remained consistent, significant developments occurred during this period. The GYT (Genuine Yamaha Tuning) kit, initially an aftermarket accessory, boosted horsepower from 21 hp to 30 hp and became a factory option. In 1970, Yamaha introduced the DT1 MX version, a dedicated motocross bike with the GYT kit pre-installed and street-legal components like the headlight and speedometer removed. This version also featured a 21-inch front wheel. Changes were also made to the transmission, with finer pitch gears for 1970-1971 models, and a slight modification to the compression ratio between standard and GYT-kitted versions. Q: How can I identify the exact version of my 1968-1971 Yamaha DT1 250?

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