I've always been told I'm a "slow rider" because I don't use the entire tread of my rear tyre...
My last experience is the evidence it's impossible to exploit completely my 17" racing tire with paso!
This is the exaust line, the collar and its nut

this is the rear prospective (can you image the grinding angle?)

Here's a detail of the nut

Is grinding the exaust nut enough to show the limit?

riding style can effect lean angle. the style of riding where you hang off the side of the bike in corners can increase cornering speed without increasing the lean angle. this method allows a rider to corner faster when he has run out of ground clearance, so you were either doing this before or its time to do it now. theres nothing more satisfying than when you start scrapping parts on the ground. when I used to race bikes back in the 80s my lap times dropped slowly as I ground away more parts on my bike. have fun John

No problem! For sure, my exhaust bolt has his stock shape.
I never dropped the bike and at least, some wear could be made by the previous owner .
Ciao

Nice discussion...

Frankie: You have updated Your "sign" , but can it be, that your red 907 is 91 and new black one is 92 ????

That 10. number/letter in VIN code means here in Europe manuafacturing year and in USA bikes it means year modell..... I havent check it from my Pasos, but in ST series bikes its just so.... It reads in ST2 and ST4S workshop manuals very clearly.... My "EU" ST2 is 2001 modell, but build in 2000(10. = Y) and my "EU" ST4S is 2002 build in 2002 (10. = 2). As i told, this is in ST series and also other same time area(and later) Ducatis....

Anyway 907IEs with black front Brembos are 91 modell and with gold Brembos 92 modells, no matter, when they have put to street use...

so you're not using the edge of the tyre? peer pressure getting to you? simple solution...
take an angle grinder and take the tyre edge right off with that...while you're at it grind a bit off the footpegs and maybe a touch off the handlebars, too...finish with a rough rasp for effect.
Bingo - you're a racer!!
then when your buddies say you ride too slow tell them the bike hasn't got enough ground clearance and show them the evidence...lol

back to reality; in fact - the exhaust grounding is not good - I have seen some 4 cylinder bikes go to ground because the "fixed" exhaust lifts the wheels off in the corner...not nice.
Harleys suffer from insufficient cornering clearance and will grind the cases even under moderate cornering.
I would suggest you rotate the clamp for a bit more clearance.

I have screwed my shockie right up hard; I can get to the tyre edge occasionally but this is by using the rear brake in the corner (which allows the bike to crank over a bit more).
It also depends on your tyre profile..mine is a Michelin 170/60ZR17; wider profiles give more clearance but are harder to "peg" with...I have never pegged the 907 but have had my toes scrape

the only bike I could truly "peg" was a TZ350 Yamaha, on racing slicks...
I was told NEVER to use the brakes in corners with slicks (rightly or wrongly) and just keep pushing the bike over in the corner...
I wore off the pegs and the toes of my boots with that bike - but never won a race in my whole racing career...go figure!!