Took YBR for MOT and they replaced rear tyre with wider one

[Yamaha YBR rider]

I took my 2012 YBR125 for an MOT and the rear tyre needed changing. When I got it back I noticed that the rear tyre was 100/90 rather than 90/90. I always found the old tyres to be too narrow and these new ones are good Michelin ones. I was just wondering if this is good or if I should get it changed back to a smaller one. The front tyre is the same and didn't need changing.
Thanks

[WD Forte]

If they put a tube in it I'd be concerned
If they fitted a tubeless one and it doesn't foul anywhere,doesn't lose pressure and rides well I'd leave it be.
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bikers smell of wee

[Robby]

It isn't going to make any noticeable difference.

[slowasyoulike]

As has been said, as long as it's a tubeless one it'll be fine. Chances are you'll never notice any difference in use.

[redeem ouzzer]

Since when do YBR's have tubeless rims?

But as long as it's not rubbing on anything I wouldn't give a shit.
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Be a REAL MAN!

[WD Forte]

[Ayrton]