20 Most Recent 1999 Yamaha YZF 600 R thunder cat Questions & Answers

0.7mm to 0.8 mm

are the carbs balanced correctly and are you sure that all of the jets are clean. if not try it, it might work. sluggish throttle response is normally to do with the carbs.

Hello,

If you are referring to the Drive Sprocket the torque is 43 ft-lbs (according to the service manual).

Regards,

Oz

Sounds like you have blocked or partially blocked pilot jets,
this can happen if bike has been sitting anf fuel has gone stale in bowls or contaminated fuel in tank.
hopefully bike if well serviced or could be caused by air leaks or even tight inlet valve clearance if bike has done a lot of miles