Recently cleaned a newish Shimano Nasci FB to try to get rid of a clicking sound. Ive tested it without spool, still clicks. Without handle, still clicks. Bearings are good. It only clicks in the upright position, if i reel with the reel horizontal, no click. The spool shaft does not appear to be bent and the reel free spins great. From everything Ive seen, it appears to be due to the oscillation design as it seems to click when the oscillating slider ends are reached by the pin on the oscillating gear? The pin that the oscillating slider slides on has a fair amount of play as it enters from under the reel body as opposed to the side and the bottom cover does not have a prong to reduce the movement. 

 

Anyone else experience this clicking or any ideas on what to check? 

 

 

Interesting. I've had my Nasci since May and last week I had this happen to me.

 

Like you, I only heard it if while I was fishing a spoon or fluke or the reel was up right.

 

I didn't hear it fishing a topwater BUT as you stated, I had the rod tip down so the reel wasn't upright.

 

I just sent mine off to Shimano this past week so I hope they have a fix or replacement.