James As per my posts last week, I've just put the bike back together with your 'base-line' suggestions. Namely; EKN Needle #4 Main Jet #175 Pilot Jet #45 Pilot Air Jet #100 Pilot Screw @ 1.0 turn out The airbox cover is removed, and the bike is YZ-timed (its a '99 WR with the FCR carb) So, the results: terrible !!! 1. Starts OK, and ticks-over really sweet 2. 1/8 to 1/4 throttle, missing and banging 3. 1/4 to 1/2 throttle, really struggles to pick-up 4. Full throttle, really strong So, what do you suggest I change first? Would I be right to guess that the bike is too rich low-down, and too lean in the middle? Your valued help and advice would be most appreciated. That includes all you guys who have some thoughts. Look forward to hearing from you.