We raced with the BT-090 Pro on our '91 ZXR w/ an 18" rear. They're actually pretty decent tires but we had to run a 150 as we couldn't find the 140 for them here in Japan. It squares off the tire but it was either the 090 or some dual sport tire. You'll also never burn off your chicken strips if that matters just because of how the tire mounts to the rim.

We have since swapped for a 17" rear and options are abundant.

I guess I'm saying the BT 090's are great tires, but 150 on a 140 wheel does have it's negative impacts.

Dana
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2016 Husqvarna 701SM
2021 Husqvarna FS450 supermoto
1995 NSR250r MC28