Just gave it a go on oem gaskets. Gave one 90 sec with map/pro benrzomatic torch hanging from a coat-hanger wire, it was hard to get a uniform red, then straight into cold water. Thickeness measured 2.10 mm before and 2.10mm after, none of the header pipe high/low indentations changed on the gasket.
I just buy 3 sets of K factory gaskets from webike any time I put an order in if needed. I did try to reuse the OEM once (without the above) and had to chase down a ticking noise that ended up being the flange gasket. Each one to there own. Maybe might work with an oxy but not for me.
Z900 not listed but just used a set on the z900 motor, same/same.
https://japan.webike.net/products/24983285.html

My research into heated grips indicated the Oxford were at the top for price and performance. They have 3 styles for the grips. You would have to see if they have a different diameter. I went with gerbing heated 12v gloves. One plug when getting on the bike with the option to expand to clothing later. Heated grips draw 4 amps, gloves 2 amps. The RS has a 15 amp larger stator to cater for the heated grips. If you go with gerbing unless it states that the Y cable, controller  and battery harness are included you have to purchase seperately. I went for the kaoko throttle lock. Does not interfere with the grip at all.
You could put the RS stator and rotor into the Z900 (heavier rotor/flywheel though) but you would have to mill out 1.6mm of the stator engine cover where the stator mounts or use the RS engine cover. Same plug just different colour.

Like I said in the original post, yes, I can, but z900 designed their rear turn signal assemble in a way which makes it very awkward to screw it back in, so I am trying to avoid it if possible.

Hello. 

I have a 2019 z900 and yesterday I discovered that a bolt fell out of my rear turn signal assembly, so now it is hanging on the wires.  It's the bolt that holds together the mount on one side of the bracket and a steel plate on the other side.  I still have the steel plate, but the bolt is gone.

I looked in the shop manual and it doesn't say anything about the specs for the bolt.  Of course I can take out the second turn signal's bolt and measure it, but it means I'll have to install both turn signals later and it's a very uncomfortable proposition because of the way it was designed, so I'd prefer to avoid it if I could. 

My question is - does anyone know what are dimensions and thread on that bolt so I could buy a replacement?  Or is there a place online that has this info?  I tried googling it but couldn't find anything relevant.

Thank you!
Luka

This topic has been moved to Z900 - Main Chat board as it's not ab intro....

https://www.z900forum.com/index.php?topic=6145.0