That's a big fat yes. The 850 handles way better, night and day, but mechanical wise it's a nightmare.
From what I have seen it will be good for a while and then things start to go south almost in rapid succession, one issue after another.
1. Drivers ratchet b/c there are less teeth doing the work.
2. To fix this, it's recommended to make track singing tight. Now the suspension cant work properly, the tunnel can fold and /or the driveshaft bends. Customer usually pays for damage.
3. Uses a ton of oil. Like 15-1 or more.
4. Chains stretch like crazy and the chain adjuster can back off.
5. Primary clutch.
6. Wheelies too much and tends to want to come over backwards on steep stuff.
Unless tied into the manufacturer by way of sponsor or deal, most hard core 850 riders have switched brands due to lack of support with 850 issues.
Do you own a 850?