Hi
This question has probably been answered dozens of times.
Will a 150/60 x 18 tyre go straight in a 3EN2 deltabox swingarm
Have seen Bridgestone BT090 F&R tyres at pretty good prices but no matching pairs with a std 140/60 rear
Don't want to go down the route of changing swingarms etc for a 17" wheel
Trying to keep bike pretty std except for colours
Cheers
Tony

Yes - a 150 will fit.
It will make gearing slightly longer, so slightly lower acceleration but lower revs at speed ... you're looking at 5 at 100 mph at most.

Cheers