Has anyone any experience with this product, Factory Pro Shift Kit (www.factorypro.com). Kit includes new shift detent disc profile, slightly heavier detent spring and and ball bearing detent arm assembly. Has received glowing reports from VFR web site in USA, improves shift quality and helps eliminate missed shifts apparently.

I don't have experience of the Factory Pro shift kit on my 400 but I do on my SP2. The stock shift on the SP2 is pretty sloppy and I was constantly getting false neutrals, the shift kit totally solved the problem. I've not had this issue with the RVF.

Lasse has been using one on his super trick NC30, works well im told. I have one on the todo list

Ive one of the cheaper string only kits on my Suzi and it gives nice tight gear changes, but the suzi has a better shift than Honda to start so i'd give the full kit a go.

Thanks for the feedback. I find the NC30 shift can be notchy & vague at times, sounds like this kit would be an improvement.

A little bit of info for you, bottom right pic
http://www.rvf.dk/My-RVF-Trackbike/my-r ... kbike.html