All Hondas that I can think of used OHC up to the 250 that came out in about 1998. Since then each new model has been pushrod, though the Rincon is "high cam" and I suspect the other water cooled models are too. I haven't stripped any of them yet.

 

According to this site even Honda's newest Rancher , Foremans and Rubicon
with the newer 475 Liquid cooled are all OHV. 2015 Honda FourTrax® Rancher® ES (TRX420TE1F) ATVs they also say the 680 Rincon is a OHV http://www.atvreviewnetwork.com/enth...cleCode=415495 That was my reasoning why Hondas are so down on hp for their displacement class vs the OHC brands. Infact only Honda still uses OHV period I think.

Heck many are moving from SOHC to DOHC now.

Honda did change the 475 Foreman Motor from Air/Oil to water cooled a few years ago but its 28hp did not increase due to it. Seem like they left the motor alone and just added a water jacket and that's it.

 

High cam engines are pushrod, just very short ones. If I remember rightly, the Rincon cam was level with the head gasket. The "new" 500 engine looks a lot more like the 420 one than the air cooled motor it replaced, in fact rumour has it that the 2014 420 and 500 share cases with only bore and/or stroke being different.