They used an intercooler, and parts scavenged from three other makes of vehicle to attach a small Japanese turbo to the Greaves, achieving a 15 % power gain, 5% economy gain and lower noise levels. Total cost was 17,500 rupees - around US$370."Thiruvananthapuram: A group of students of the Lourde Matha College of Science and Technology at Kuttichal, near here, has developed a turbo-charged engine for the Royal Enfield Taurus, the only diesel motorcycle in the Indian market."
Full article and photo:
http://www.hindu.com/2009/05/24/stories ... 180200.htm