I find Dan to be opinionated at times, but I sent my clutch to him and am very happy, and I've seen very few complaints about any of his work or products. I'd guess he has higher customer satisfaction than Polaris. He might do better business by taking a different tact, but he's not selling coffee or designer clothes, so he can say pretty much anything and not lose that much business as long as he keeps doing good work and standing behind it.
As for the motor itself, I think the first year went well enough to call a success, and that 2020 addresses MOST of the issues that did come up. I'd guess the failure rate was elevated, but better if anything than the last few new motors Polaris has introduced. Really, the one big "I wonder" item is the cylinder wall finish. I have no way of telling if the one Dan showed pictures of is representative – maybe, maybe not, but it'd be interesting to compare the lifespan of one like that with a "fixed" one. Dan's finish has to help, but how much? As for a big bore, I've gotta agree with Dan on that. I'd guess Polaris had good reasons to stop at 840 – even OE attempts at over-850 motors seem pretty iffy, let alone aftermarket, and you know a both have been trying (and promising). A few people might find it's a good fit despite the drawbacks, but I'm betting twin pipes and/or a turbo will be a better cost/performance/longevity mix for most buyers looking for more.
