Finally got some time to work on this. Sorry I didn't take as many pics as I shouldve. The grom bolts were bigger than the crappy little one Jiangsu used. So, I drilled out the hole to accept the bigger bolt. Yes it was a pita.
I can see why they use the smaller bolt though. The weld from the swingarm bushing area doesn't give much space for wide (shoulder) bolt or nut. In fact you can't even get the bolt/nut in there with the swingarm on.
I used my jack to slightly get it out of the way enough to get my nut on. I used a hobby knife to trim the chain rubber a bit, just to make sure it didn't bind.
Again sorry I didn't take more pics. Here's my nice big bolt installed after alot of smack talking,...
Much more 'solid' feel to the bike. Buzzier in the foot pegs as well. What's next,....