Welcome, very nice looking bike. I have not found too many helmets that fit in anything other than a Top Box. It depends on where I am but fact is they are easy to steal. I have never had a helmet stolen in my 45 years of riding but I take them in with me 90% of the time unless it's locked in the rear box.
I'm a bit "old school" no two ways but a full face offers the most protection and tends to be the most confining, you can work your way down from there. I actually have different helmets for different bike and weather. That is a little over the top, I know.
For my scooter and usually Sportster I tend to wear a good 1/2 helmet, what is commonly know as a CHIPS. I've had a few models, trying them on is important due to head shape. It is probably more PC to buy from the shop you try them on at and I will if it's a Mom & Pop type, big Super Centers are the Motorcycle Boutiques, well I go on-line. They usually get enough money, I had to get a special screw for my Sportster to be correct, it was $9 for a #@%# Screw?
For the Scoot and the Sportster I wear a Scorpion old model EXO-100 (silver of course to match the scoot) somehow I seem to have lost one so I also have a Scorpion EXO 110 (Black but it does have a red flair strip) it's a bit more modern, both have a drop down shade. I just like open helmets, when I can. I have specific leather for each bike too but I'm a bit over the deep end.
I know not as safe but in nice weather I like to wear an open face, these are light have some nifty features and get good reviews for what they are. I also have on heavy solid Bell 3/4 for anytime I want an open face but more protection. For true safety you just can't beat a full coverage of good quality.
For the Ducati I use a Biltwell Gringo, full face but very large opening, no shield unless you snap that on. it's very "old school" but has the right look for the Monster.
After that I go Modular, have a GMax, it has a light in back for visibility, can even work with your brakes. Good fit, decent reviews. I also have a Zeus, they are a very good Helmet according to almost all reviews and very cheap in cost but a very GOOD Helmet. The Zeus brand gets very, good safety reviews in line with expensive $400 + and the Zeus can be had for around $100 here is a link to review the Zeus Helmet, may not work but one can find them easy enough
http://www.webbikeworld.com/r2/zeus-helmet/zeus-helmet.htm
Still, it has to fit well to be of any use.
⚠️ Last edited by DrScooter on UTC; edited 6 times