CV carbs, not slides. You must not have cleaned much if you didn't figure this out, popping off the tops of the needles gives it away.
Check your parking brake adjustment and connections to your reverse sensor (located behind the shifter). This can cause intermittent bogging on account of the rev limiters associated with them.
Check your parking brake adjustment and connections to your reverse sensor (located behind the shifter). This can cause intermittent bogging on account of the rev limiters associated with them.