It might be a good idea to research the airflow those air cleaners are rated for. It wouldn't surprise me to learn that they're a bit under capacity for a 235 engine, especially at highway cruise speed. I run one approximately that size on my Harley, and it's OK for an 80 cubic inch engine. It might be wise to consider using filters that are a little taller, and/or larger diameter on the engine in the photo. Just a suggestion.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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