Facing problems when shifting the gears of 180DTSi in Indian Bikes Posted October 2, 2007 · Report reply Hi there again, Can anyone please tell me how much slackness should be kept for Bajaj Pulsar 180DTSi (LCD Speedo) and how to measure it(Should it be measured just by moving the chain up and down and measuring that distance)? How to find out the air-fuel ratio is correctly set or not? How much turns should the air-fuel ratio screw be turned anticlockwise after fully tightening the screw for proper combustion (i.e how to set the air-fuel ratio of 14:1)? Please answer soon. Bye.