I don't know how I missed this thread ... but I did. Sounds like you have made similar mods to yours as I did to mine. I'm a bit lighter though at 72Kgs and with the standard RR spring the bike has done all I've asked. If you've got a Facebook account search for "SpudzAfricanAdventure" and you'll find how I had an incident that did indeed impact the exhaust and then how my new found best friend in Cape Town redesigned the right hand rack to offer some protection for the rest of the trip. I've tried TKC70a, TKC80s and Anakee Wilds. I think for the mixed riding that aligns with what you're doing, the TKC80s were my preferred tyre. They do last pretty well on the little 310. I mat have a go with the MotoZ range next though or the Mitas E07 combo as they get a decent review. I can confirm that this is one tough little bike and I'm looking forward to getting it home this week from it's return trip. Many happy miles to enjoy.