Just sold my 2020 ltx le With td multi map dash flash and all the supporting mods. Ordered up an Indy XCR 850 for this coming season. I demoed an 850 assault b 4 buying the winder. I’m sure I’ll notice the power difference as I always trial rode the winder at 290 on max spool 17. Was crazy fun power but pay for the weight of the sled trying to keep up with 850’s in the twisters. Been on Yamaha 4 stoke since 2005 so looking forward to a sled that’s 150 lbs lighter, looking for a better feeling body after a hard 200+ mile day attacking the trail.I did the same . The 850 felt like a slug compared to my 270 winder. For a two stroke both the 650 and 850 are great motors. The 650 with its smooth powerband was the choice for trail. We liked it so much we ordered one for my wife. I am sure I will also ride it on the tight trail days when she doesn’t go out.