" has a false neutral or goes right past to 5th.
Any feed back would be appreciated. "
____ Do you happen to be a "toe-jabber" ? ... Who does the type of foot-shifting where ya hit the shift-pedal with a 'jab' from your toe ?
Does your shifting-issue occur more readily when you're speed-shifting (as opposed to when you're taking it more easy) ?
If so, (or even not), you ought to read my post concerning shifting-method, at this link... viewtopic.php?f=3&t=26&p=257#p257
__ That old-post should explain for you the cause of your "false neutral" (and the most likely reason for why ANYONE has ever missed a shift on their Duke),, while your overshooting -(past the intended gear & into the next) issue, is certainly most-likely due to jabbing too much energy into the shifting-mechanism.
Many riders hit & release ("jab") the shift-lever/foot-pedal with their toe so hard & fast, that too much momentum-energy then gets introduced into the selector-wheel (& also the shift-drum),, thus causing that wheel to 'flywheel' forth-ward (past the ball-stop indentations which are meant to stop & hold it in expected place).
If the shifting 'jab' is not allowed to complete (by KEEPING toe pressed-down, as directed in my old-post), you'll then somewhat-help keep the wheel from fly-wheeling. _ But it's best to not be so excited while shifting and learn how to do it more calmly, as suggested.
__ In the past I've had a number of riders complain about missing shifts, yet when I'd try their Duke, they'd then be perplexed that I-myself would not encounter THEIR shifting-issue !
It's all a mater of shifting-style (or lack of it !), as to whether ya miss any shifts.
Since I discovered on my own the best way to COMPLETE shifts,, ever-since then, I have NEVER missed a shift on any DUKE (or any other motorcycle) !
So be sure to try & learn the shifting-method I preach ! - (As indicated in the old-post found with the given link, inserted above.)