What are your concerns with the valve sizes? We still have to run the stock appearing carb. The is no max bore requirement however.Pretty sure if there was a ring problem Wiseco wouldn't be selling it. Been running their 2 ring pistons without problems for years. Not sure what you are trying to accomplish with your engine but seeing its an alcohol engine I would be more concerned about valve size.
Well, airflow for starters.What are your concerns with the valve sizes? We still have to run the stock appearing carb. The is no max bore requirement however.