– Classic 350 with flex-fuel blend unveiled – Gets green and red paint scheme – Likely to be launched in 2025 Royal Enfield has unveiled a flex-fuel version of its most successful motorcycle – the Classic 350. This bike was unveiled at the ongoing 2024 Bharat Mobility Expo. Flex Fuel Classic 350 can run with a blend of petrol and ethanol. However, the exact percentage of ethanol blending has not been mentioned. Currently, most petrol pumps across the country have 10 per cent ethanol blended in their petrol tanks. The government has plans to take the ethanol blend to 25% by 2025.