I'm new here, clearly. I've verified that I can order a stock 3.8" pulley should I decide that a 3.6" isn't right for whatever condition (Minnesota winter, or a long trip for example).

I'm wondering if there are larger pulleys. I'm very familiar with these engines and the Eaton M90's bearings longevity aren't my concern. What is a concern is how the engine might behave under lower pressure. I have more than enough info for running tiny pulleys.

Any input is appreciated.