It has become annoying to pay dealer prices ($250 + labour) every ~8,000 miles (yes, that often).

Motion Pro from MonsterParts https://monsterparts.com/products/motion-pro-pbr-chain-tool?_pos=1&_sid=59898c3ab&_ss=r

or....

is it worth it to go full D.I.D.?    http://www.didchain.com/chainTools.html


Another question: my dealer always use an angle grinder to cut the head off a pin, before pushing it out. Good practice?

I wrote this in 2015. Photos are missing, but you can still watch youtube videos. Everything I wrote there applies to your S2R.

http://www.ducatimonsterforum.org/index.php?topic=71572.0



The tool

I'd say, just buy Motion Pro P(Press) B(Break) R(Rivet) tool from Jeff.
No need to spend more money on DID or RK tool. (I do have both.)

https://youtu.be/UF7UAsHF6qE

https://youtu.be/gFEO2PtTA0E

About grinding off the head of the rivet ...

I said this in the thread linked above.
Even though some people say it is not necessary to grind off the rivet pin heads, I still recommend to do so, IF you care about your tools.
Grinding off takes less than 5 min. with hand file, less than a minute with dremel, and it significantly reduces the load on the tool (pin). Your tool will last much longer.
(It is, kind of like wearing hearing protection when riding a motorcycle. While there are many riders who claim they’ve never bothered wearing ear plugs and they have no problem at all, and no helmet manufacture say you should wear ear protection, if you want to enjoy your hearing ability for long time, it is better to wear them.
Also, before I got S4R, I was heavily into air cooled Kawasaki inline fours, and those dinosaurs run 630 chain. (I usually converted them to 530, though.) You won’t be able to break 630 chain without grinding off the pinhead first. )

I actually just went through that whole deal... converting my 796 over to the quick-change sprocket/carrier, and riveting a new chain.  One of the forum members loaned me his MotionPro PBR, which worked fabulously.  Definitely worth the money, it seems, and I may just wind up buying me own.

I got this one a while back and it has served me well: https://www.mikesxs.net/yamaha-xs650-chain-breaker-and-riveting-tool-kit.html

About $30 less than the MP tool.

Motion Pro user here and it works as advertised.

I always grind off the head of the pin.
A) Easier on the tool, and on me.
B) No risk of fuxxoring the bore of one link on a *brand new* chain.

I've used this tool for 12+ years:
https://www.motionpro.com/product/08-0058

These posts always remind me what a fair weather rider I am, 12000 miles in 12 yrs! FWIW I have the Motion Pro PBR and it works great (so far). Changed my chain for the first time a few weeks back and it was fairly straightforward. If you don't have any, also get some digital calipers so you can measure how much you have expanded the pin head on the rivet link. I think DID had a spec for how expanded it should be.