I have a 1979 polaris apollo 340. that I have cleaned the carbs and put new needle and seats in new fuel line and filter. It will start and idle and run. But it wont take full throttle and if you roll the throttle on it will run up to 3/4 but not full. And if you punch the throttle it will bog. And bog at full. It does run a little rich. I think I have the carbs adjusted right. Could it be the choke plungers are wore out and need replaced. Do they wear out. The cable seem to be ok. This has got me stumped but at least I can ride some. Any help will be greatly appreciated. Thanks for your time everyone.