Bought those as well but from a different seller. Seller had matching normal right hand thread bolts also. Ordered one of each for $1.70 a piece.
I added a SS lock washer on top and on the bottom of the reservoir bracket to reduce the bolt size to about 12mm. I think it looks factory clean. You be the judge.
i just got a monster 1200 r and am getting bar end mirrors. i have read that the threading on one side of the mirror bolts is reverse. i've never come up upon this on any of my other bikes. i will need to remove the mirrors and get bolts a little shorter to hold down the reservoirs. does anyone know the size of these bolts and is one a reverse thread. i figure they're 10mm or 8mm. thanks for your help.
my 2017 monster 1200 r is m8. right twist on one, left twist on other. you'll probably have to cut is down some. no big deal. i just but it in the drill head and turn it with a hack saw. just brush out any little shavings. there is also a guy on eBay selling knurled ones that are cool but like $30. they look cool but are out of stock now.-----http://www.ebay.com/itm/192080603352. i also went to cnc racing and they have beautiful stuff. here is the page for my bike. ---- http://cncracing.it/en/prodotti/duca...1200-r-2016-17. i've had rizoma spy r's 80mm on a couple of bikes as well. theses cnc racing barrends use your own bar end to fasten them to the bars. imho they are beautiful. i'm ordering them plus a few other parts-hard to contain myself. with my bmw's it was rizoma. with my monster it's ducati billet and now cnc racing. i'm unable to sleep waiting for my new farkles. if you own a ducati, the sticker shock should not kill you-not cheap but beautiful stuff. just make sure you give the correct year. you'd think 2016 & 2017 would be the same. THEY ARE NOT-ducati updated some parts and fitments before really updating the bike. just be ware. on. many parts-even foot pegs, there is a difference. i found out the hard way.