Pumper carb
you can buy a pumper from fourstrokeworks.com I two own a klx 300 bought it used just getting back into riding after 20 years thought I would check out a thumper just now getting serious about going through the bike getting ready to check the valves ,add a hot start kit ,an improved crankcase breathing system and an improved shifter star , eric gorr has some positive things to say about the cv carb only one I have seen to be positive about it I want to e mail him and see why